Powermatic 3520B User Manual

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Operating Instructions and Parts Manual

Woodturning Lathe

Model 3520B

WMH TOOL GROUP

shown with optional 18-inch bed extension and user-made shelf

Warranty and Service

WMH Tool Group, Inc., warrants every product it sells. If one of our tools needs service or repair, one of our Authorized Service Center located throughout the United States can give you quick service. In most cases, any of these WMH Tool Group Authorized Service Centers can authorize warranty repair, assist you in obtaining part s, or perform routine maintenance and major repair on your POWERMATIC

MORE INFORMATION

WMH Tool Group is consistently adding new products t o the line. For complet e, up-to-date product i nformation, check with your local WMH Tool Group distributor, or visit powermatic.com.

WARRANTY

POWERMATIC products carry a limited warranty which varies in duration based upon the product.

WHAT IS COVERED?

This warranty covers any defects in workmanship or materials subject to the exceptions stated below. Cutting tools, abrasives and other consumables are excluded from warranty coverage.

WHO IS COVERED?

This warranty covers only the initial purchaser of the product.

WHAT IS THE PERIOD OF COVERAGE?

The general POWERMATIC warranty lasts for the time period specified in the product literature of each product.

WHAT IS NOT COVERED?

The Five Year Warranty does not cover products used for commercial, industrial or educational purposes. Products with a Five Year Warranty that are used for commercial, industrial or education purposes revert to a One Year Warranty. This warranty does not cover defects due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear, improper repair or alterations, or lack of maintenance.

HOW TO GET SERVICE

The product or part must be returned for examination, postage prepaid, t o a location designated by us. For the name of the location nearest you, please call 1-800-274-6848.

You must provide proof of initial purchase date and an explanation of the complaint must accompany the merchandise. If our inspection discloses a defect, we will repair or replace the product, or refund the purchase price, at our option.

We will return the repaired product or replacement at our expense unless it is determined by us that there is no defect, or that the defect resulted from causes not within the scope of our warranty in which case we will, at your direction, dispose of or return the product. In the event you choose to have the product returned, you will be responsible for the handling and shipping costs of the return.

HOW STATE LAW APPLIES

This warranty gives you specific legal rights; you may also have other rights which vary from state to state.

LIMITATIONS ON THIS WARRA NTY

WMH TOOL GROUP LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR EACH PRODUCT. EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG THE IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

WMH TOOL GROUP SHALL IN NO EVENT BE LIABLE FOR DEATH, INJURIES TO PERSONS OR PROPERTY, OR FOR INCIDENTAL, CONTINGENT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF OUR PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.

WMH Tool Group sells through distribut ors only. The specifications in WMH catal ogs are given as general information and are not binding. Members of WMH Tool Group reserve the right to effect at any t ime, wit hout prior notice, those alt erations to parts, fittings, and accessory equipment which they may deem necessary for any reason whatsoever.

tools. For the name of an Authorized Service Center in your area call 1-800-274-6848.

Warranty and Servic e ..............................................................................................................................2

Table of Contents....................................................................................................................................3

Warning...................................................................................................................................................4

Introduction..............................................................................................................................................6

Specifications..........................................................................................................................................6

Unpacking...............................................................................................................................................7

Contents of the Shipping Container......................................................................................................7

Assembly.................................................................................................................................................8

Comparator Rear Bracket.....................................................................................................................9

Tool Caddy...........................................................................................................................................9

Guard...................................................................................................................................................9

Bed Extension (Optional Accessory)...................................................................................................10

Shelf Assemblies (Optional) ...............................................................................................................11

Grounding Instructions...........................................................................................................................12

Single Phase Operation...................................................................................................................... 13

Three Phase Operation......................................................................................................................13

Extension cords..................................................................................................................................13

Adjustments...........................................................................................................................................13

Headstock and Tailstock Movement ...................................................................................................13

Cam Tightn e ss...................................................................................................................................14

Tool Support ......................................................................................................................................14

Locking Handles ............................................................................................................................... ..14

Live Center and Cone.........................................................................................................................15

Indexer...............................................................................................................................................15

Centers – Installi ng and Removing..................................................................................................... 15

Face Plate – Installing and Removing................................................................................................. 16

Comparator – Installing and Using......................................................................................................16

Speed Change...................................................................................................................................17

Sheave and Belt Alignment ................................................................................................................18

Checking Spindle Play........................................................................................................................18

Shea ve/Drive Bel t Rep lac ement.........................................................................................................18

Operating Controls.................................................................................................................................19

Operation...............................................................................................................................................20

Turning To o ls.....................................................................................................................................21

Spindle Tu rning..................................................................................................................................22

Cutting Techniques ............................................................................................................................23

Face Plate and Bowl Turning..............................................................................................................25

Bowl Turning Techniques...................................................................................................................26

Maintenance..........................................................................................................................................27

Indexer Positions...................................................................................................................................28

Troubleshooting.....................................................................................................................................29

Recommended Lathe S peeds (per diameter of workpiece) .....................................................................30

Replacement Parts................................................................................................................................30

Headstock Assembly.......................................................................................................................... 31

Parts List: Headstoc k A ssembly .........................................................................................................32

Stand and Bed Assembl y ...................................................................................................................34

Parts List: Stand and B ed A ssembly...................................................................................................35

Optional Accessories: B ed E x tensions................................................................................................36

Optional Accessories: Outboard Turning Stand...................................................................................37

Optional Accessories: A dapters, Face Pl ates, and T ool Support s .......................................................38

Optional Accessories: Dust Port Assembly .........................................................................................39

Electrical Connections ...........................................................................................................................40

Electric al: Rem ote ON/OFF Switch (Optional Accessory) .......................................................................41

Warning

1. Read and understand the entire owners manual befor e attempting assembly or operati on.

2. Read and understand the warnings po sted on the m achine and i n thi s manual. Failur e to comply wit h

all of these warnings m ay cause seriou s i njury.

3. Replace the warning labels if they become obscured or removed.

4. This Lathe is designed and i ntended for use by properly tr ained and experienced personnel only. If

you are not f amiliar with the pr oper and safe operation of a Lathe, do not use unti l proper training and knowledge have been obtained.

5. Do not use this Lathe for other than its intended use. If used for other purposes, WMH Tool Group

disclaim s any real or i mplied warrant y and h olds itsel f harml ess from any injury t hat may r esult f rom that use.

6. Always wear approved safety glasses/face shields whil e using this machine. Everyday eyeglasses

only have impact resi stant lenses; they are not safet y glasses.

7. Before operating this Lathe, r em ov e tie, rings, watches and other jewelry, and r oll sleeves up past the

elbows. Remove all loose clot hing and confine long hair. Non-slip footwear or a nti-skid fl oor str ips are recommended. Do not wear gloves.

8. Wear ear protector s (plugs or muffs) during extended peri ods of oper ation.

9. Some dust created by power sanding, sawing, grinding, drilling and other construction activities

contain chemi cals known to cause cancer , bir th defects or other r eproductiv e harm . Some examples of these chemic als are:

• Lead from lead based paint.

• Crystalli ne sil ic a from bricks, cement and other masonry pr oduc ts.

• Arsenic and chromium from chemically treated lumber .

Your risk of exposure varies, depending on how often you do this type of work. To reduce your exposure to these chemicals, work in a well-ventilated area and work with approved safety equipment, such as face or dust masks that are specifically designed to filter out microscopic particles.

10. Do not operate this machine while tired or under the influence of drugs, al c ohol or any m edic ation.

11. Do not expose this machine to rain, or operat e m ac hine in dam p loc ations.

12. M ak e c er tain the switch is in the OFF position before connecting the machine to the power supply.

13. M ak e c er tain the machine is properly grounded.

14. M ak e all machine adjustments or maintenance with the machine unplugged f r om the power source.

15. Remove adjusting keys and wrenches. Form a habit of checking to see that keys and adjusting

wrenches are removed from the machine before turning it on.

16. K eep the safety guar d in place at all times when the machine is i n use. If removed for maint enance

purposes or for turni ng proc edures which do not perm it its use, ex ercise extr eme cauti on and replace the guard immedi ately after the operation is com plete.

17. Check damaged parts. Before further use of the machine, a guard or other part that is damaged

should be carefully checked to determine that it will operate properly and perform its intended function. Check for alignment of moving part s, binding of moving parts, br eakage of parts, mounting and any other condi ti ons that m ay affect its operati on. A guard or ot her part that i s damaged shoul d be properly repaired or replaced.

18. Provide for adequate space surrounding work area and non-gl ar e, overhead lighting.

19. Keep the floor around the machi ne clean and free of scrap material, oil and grease.

20. Keep visitors a safe distance from the work area. Keep children away.

21. M ak e y our workshop chi ld proof with padlock s, m ast er switc hes or by r emoving starter keys.

22. Giv e your work undivi ded attention. Looking ar ound, carryi ng on a conversation and “ horse-play” ar e

careless acts that can r esul t in serious injury.

23. Maint ain a balanced stance at all tim es so that you do not fall or lean agai nst the centers, workpi ece

or other moving parts. Do not overreach or use excessive forc e to perform any machine operation.

24. Use the ri ght t ool at the corr ect speed and f eed rat e. Do not forc e a tool or att achment to do a job for

which it was not designed. T he ri ght tool will do the job better and safer.

25. Use recom mended accessories; improper accessories m ay be hazardous.

26. Keep turning tools sharp and clean for the best and safest performance, and position the tools

properly in relation to the workpiece.

27. Turn off the mac hine before cl eaning. Use a brush or compressed ai r to remove chips or debris — do

not use your hands.

28. Do not st and on the machine. Serious injury could occur if the machine tips over.

29. Nev er leave the Lat he running unattended. Turn the power off and do not l eave the machine unt il it

comes to a complete stop.

30. Remove loose items and unnecessary work pieces from the area bef or e starting the machine.

31. Check the workpi ece carefully for splits, knots or other obstruct ions which m ay cause a safety risk

while turning.

32. Adjust the tool support t o the proper height and position for the work. Rotate the workpiece by hand to

check clearance wit h the tool support.

33. Sel ect the appropriate speed f or the turning job at hand. Start at low speed and all ow the Lathe to

ramp up to operating speed.

34. Never stop a rotating workpiece with your hand.

35. If gluing up a workpiece, always use a high-quality glue of the type necessary for that particular

workpiece.

Familiarize you rself with the following safety no tices used in this manual:

This means that if precautions are not heeded, it may result i n mi nor i njur y and/or

possible machine damage.

This means that if precautions are not heeded, it may result i n serious injury or possibly

even death.

- - SAVE THESE INSTRUCTIONS - -

Introduction

This manual is provided by W MH Tool Group cov ering the safe oper ation and mai ntenance procedure s for a Model 3520B Lathe. T his manual contains i nstructions on install ation, safety precautions, general operating proc edures, maintenance i nstructions and part s breakdown. This mac hine has been designed and constructed to pr ovi de years of troubl e free operation if used in accor dance with instr ucti ons set forth in this manual . If ther e are any que sti ons or com m ents, please cont act ei t her your loc al suppl ier or W MH Tool Group. WMH Tool Group can also be reached at our web site: www.wmhtool gr oup.com.

Specifications

Model Number.................................................................................................................................3520B

Stock Number.............................................................................................................................. 1352001

Working distanc e between centers (in.)............................................................................................31-1/2

Working distanc e between centers, 18” bed extension mounted (in.)......................................................48

Maximum distanc e between spindle face and tailstock quill (in.).............................................................36

Swing over bed (in.)...............................................................................................................................20

Maximum overall length (in.)..................................................................................................................73

Overall height to top of headstock (in.).............................................................................................49-1/2

Distance from floor to centerline of spindle (in.)......................................................................................45

Spindle speeds (RPM)....................................................................................high 125-3200; low 50-1200

Motor...................................................................................................................TEFC, 2HP, 220V, 60Hz

Lathe power requirements ............................................................................................. 220V, 3Ph or 1Ph

Spindle thread si z e (i n.)........................................................................................................1-1/4 x 8 TPI.

Headstock spindle t aper .............................................................................................................. #2 Morse

Tailstock quill taper.....................................................................................................................#2 Morse

Hole through tailstock spindle, diameter (i n.).........................................................................................3/8

Hole through headstock spi ndle, diameter (i n.)......................................................................................5/8

Drive system.......................................................................................................Poly V belt, inverter drive

Tailstock quill travel (in.).....................................................................................................................4-1/2

Footprint of stand (in.).............................................................................................................50 L x 24 W

Spindle direction................................................................................................................forward/reverse

Net Weigh t (lb s.)..................................................................................................................................630

Shipping Weigh t (lbs.)..........................................................................................................................682

The above specifications were current at the tim e this manual was publi shed, but because of our policy of continuous im provement, WMH Tool Group reserv es the right to change specif ications at any tim e and without pri or notic e, without incurring obligations.

Unpacking

Open shipping cont ainer and check f or shipping damage. Report any damage immediately to your distributor and shipping agent. Do not discard any shipping material until the Lathe is assembled and running properly.

Compare the cont ent s of y our cont ainer wit h the following parts list to make sure all parts are intact. Some parts can be found in separate boxes packed around the Lathe. Mi ssing parts, if any, should be reported to your distri butor. Read the instructi on manual t horoughly for assembly, maintenance and safety instructions.

Contents of the Shipping Container

1 Lathe Bed, with Headstock, Tailstock, &

Tool Support Base – (A) 2 Leg Assemblies – (B) 1 Guard – (C)

1 Tool Support, 14” – (D) 1 Face Plate, 3” – (E) 1 Live Center – (F) 1 Spur Center, 1” – (G) 1 Index Pin – (H) 1 Live Center Pin – (J) 1 Knockout Rod – (K) 1 Face Plate Wrench – (L) 1 Tool Caddy – (M) 4 Levelers – (N) 12 Socket Hd. Cap Screws, 3/8” x 1-1/4” – (O) 12 Lock Washers, 3/8” – (P) 10 Flat Washers, 3/8” – (R) 2 Comparator Centers – (S) 1 Comparator Rear Br ac k et wit h

Lock Handle – (T) 1 Owner's Manual 1 Warranty Card

Read and understand the entire contents of this manual before attempting set-up

or operation! Failure t o co mpl y may cause seri ou s injury.

Assembly

Tools required for assembly

Forklift or hoist with straps/slings 14mm wrench 4mm and 8mm hex wrenches

The Lathe should be

disconnected f rom power during assembly.

1. Remove any screws or straps that hold the Lathe parts to the pallet, and remove protective wrapping.

2. The Lathe should be locat ed in a dry area, on a sturdy floor, and wit h sufficient lighti ng. Leave plenty of space around the machine for operations and routine maintenance work.

If you have a hoist or forklift:

3. Lif t the Lat he off the pall et using a fork lift or hoist, and move it to the desired location. (Forks may need to be positioned more toward the headstock to balance the weight.) Proc eed to step 6 to install the legs and levelers while the Lathe is still off the floor.

If you do NOT have a hoist or forklift:

4. If a forklift or hoist is not av ailable, the use of one or more assistants is mandatory. First decrease the weight on the Lathe by removing the headstock, tailstock and tool support base (Refer to “Headstock and Tailstock Movement” on page 13 for removal instructions ).

The head stock is heavy; use

caution when removing it from the lathe bed.

5. Lift the Lathe bed and set i t upsi de down on the floor (make sure padding/cloths have been laid down to prevent scratching the bed). Or, set the Lat he bed upon a table of sufficient height to allow the legs and levelers to be assembled, as shown in Figure 1.

6. While the Lathe is off the floor, install the legs to the bed usi ng eight socket head cap screws with eight lock washers and eight flat washers (Figure 1). Tighten the screws firmly with a 8mm hex wrench.

7. Screw the levelers into the threaded holes of the legs (F igure 1). Tighten t he hex nuts against the bott om of the legs with a 14m m wrench.

Figure 1

8. The lev elers can be adjusted at any time to ensure the Lathe is stable and level.

9. Set the Lathe right side up (or remove it from the tabl e).

10. Ex posed metal areas of the Lat he, such as the bed and spindles, have been factory coated with a protectant. This should be removed with a soft cloth and a cleanerdegreaser. Clean the bed areas under the headstock, tailstock and tool support base. Do not use an abrasive pad, and do not allow solvents to contact painted or plastic areas.

11. Re-inst all headstock, tool support base, and tailstock.

Comparator Rear Bracket

Mount the com parat or rear bracket (A, Figure 2) to the back of the tailstock with t wo 3/8 x 1-1/4 socket head cap screws, two 3/8 lock washers and two 3/8 flat washers (B, Figure 2). The bracket has a slot so it can be aligned wit h the bracket on the headstock. (See “Com parator – Installing and Using” for further information.)

Figure 2

Tool Caddy

The tool caddy, shown in Figure 3, can be mounted to the left end or right end of the Lathe. The left end, near the headstock area, is generally preferred for convenience. Use two socket head cap screws and two lock washers with an 8mm hex wrench to secure the tool caddy to the threaded holes in the Lathe.

The tool caddy has holes for placing the knockout rod, spur c enter, live center, live c enter pin, compar ator c enters, and faceplate wrench.

Accessories can also be stored in t he tailstock, as shown in Figure 4.

Guard

The guard must always be

used in operations that will allow its use.

1. On the guard, loosen the set screw on the outer coll ar (shown in F igure 5) with a 4mm hex wrench. Slide the outer collar off the guard support rod.

2. Insert the guard support rod into the mounting bracket at the rear of the headstock, as shown in Figure 5. You will have to lif t up on the spring pi n, as shown, to slide the guard support rod into the mounting bracket. Release the spring pin and it will snap i nto posi ti on as you sl ide t he support rod far ther in.

Figure 3

Figure 4

Figure 5

3. Install the outer collar and tighten the set screw.

4. The guard can be pivoted to one of two positions: Operating mode (shown on front cover) or tilted back for stock loading (shown in Figur e 6).

5. Pull up on the spring pin, and begin tilting the guard, then release the spring pin. When the guard reaches either of the two positions, the spring pin will engage.

Bed Extension (Optional Accessory)

An optional 18” bed extension assembly, stock number 6294727B, is available for the Lathe (see your Powermatic dealer). To m ount the bed extension to the Lathe:

1. Slide the tailstock away from the edge of the bed.

2. Have an assistant hold the bed extension flush to the end of the Lathe bed, and insert three 3/8 x 1-3/4 socket head cap screws, three 3/8 lock washers and three 3/8 flat washers, through the holes in the bed extension into the threaded holes on the Lathe. See Figure 7.

3. Shift the bed ex tension upward so that it i s slightly higher than the Lathe bed. Tighten the screws with an 8mm wrench just enough to hold the bed extensi on to the Lathe bed.

IMPORTANT: The surface of the bed extension must be level with the surface of the Lathe bed to allow smooth m ovement of the tailstoc k across the seam.

4. Use a dead blow mallet, or a hammer with a block of wood, to tap down the bed extension unti l it is flush with t he Lathe bed. See Figure 8. Never use a steel-faced

hammer directly against the bed surfaces. Tap the bed extension where

needed until its surface is aligned with the Lathe bed, and the inside ways are aligned.

Figure 6

Figure 7

(optional 18” bed extension shown)

5. Firmly tighten the three socket head cap screws. Make sure your alignment of the bed surfaces doesn’t shift while tightening the screws.

6. Unscrew the stop bolt from the Lathe bed (Figure 7) , and screw it into t he hole at the

Figure 8

end of the bed extension.

For outboard turning, where the headstock is moved to the opposite end of the Lathe to accommodate large bowl blanks, you can (1) mount the 18” bed ex tension to the three l ower holes on the Lathe frame, and (2) mount a vertical extension post [optional accessory, stock number 3520B -310] to the tool rest base. See Figure 9.

Shelf Assemblies (Optional)

The double ledges on the inside of the Lathe legs will provide support for a shelf (not provided), which is convenient for storing larger items while keepi ng them easily accessible.

Figures 10-11-12 illustrate three methods of creating a shelf, using common lumber and basic tools.

IMPORTANT TIP: It is unlikely that a full-size shelf can be com pletely built and then i nserted between the Lathe l egs. Therefore, construct the shelf in pi eces and insert screws only after the shelf has been established beneath the Lathe.

Shelf Style 1 (Figure 10) Lay two 2x6 boards f lat upon the inner l edges.

Boards of 48” l ength are suitable, al though 481/2” is optimal.

Shelf Style 2 (Figure 11) Lay two 2x4’s (or 2x 6’s) on edge int o the outer

ledges. Boards of 48” length are suitable, 481/2” optimal.

Cut two pieces from a plywood board, and screw them t o the top edges of the 2x4’s. (One 48” plywood piece will not fi t through the l egs of the Lathe; use at least two pieces.) Make the plywood pieces flush with the outside edge of the 2x4’s.

Figure 9

(shown with optional acc es s or ies )

Figure 10

Shelf Style 3: (Fi gur e 12) This is a basket-style shelf consisting of two

2x6’s and dowel rods. The advantage of this design is that m ost wood chips will fall through the shelf instead of accumulating on it. The instructions below are for building the shelf shown in Figure 12. The completed shelf is shown on the front cover of t his manual.

Materials used:

2 – 2x6’s (48” suitable, 48-1/2” optimal). 8 – wood dowels, 4’ length, 5/8” diameter.

Figure 11

1. Mark your hole centers (2” centers) along the length of a 2x6. Pl ace the holes so that the tops of the dowels will be even with the tops of the l edges on the Lat he. Al so, adj ust your hole center s as necessary so that the first and last dowel will begin at approximately the same distance from the ledge at both ends of the Lathe.

2. Use a 5/8” spade bit c hucked i n a dri ll press or in a portabl e dril l. Bore t he holes through one 2x6; this will be t he r ear pi ec e.

3. On the other 2x6, do not bore through but only deep enough to securel y hold t he ends of the dowel rods. This will be the front piece and will provide a pleasing appearance at the front of your Lathe.

4. When all hol es have been bored, place t he 2x6’s on edge in the outer ledges of the Lathe.

5. Cut the dowel rods to length with a miter saw or hand saw, so t hat after i nsertion the rods will be flush with the back of the rear 2x6.

6. Insert the dowel rods through the holes in the rear 2x6, as shown in Fi gur e 12.

7. A strip of wood can be screwed to the rear 2x6 to cover the dowel holes and prevent the dowels from working out.

Figure 12

Grounding Instructions

Electrical connections must

be made by a qualified electrician in compliance with all relevant codes. This machine must be properly grounded to help prevent electrical shock and possible fatal injury.

This mac hine m ust be grounded. I n the event of a malfuncti on or break down, groundi ng prov i des a path of least resi stance f or electric current to reduce the ri sk of el ectri c shock.

Improper connection of the equipmentgrounding conductor can result in a risk of electric shock. The conductor, with insulation having an outer surface that is green with or without yellow stripes, is the equipmentgrounding conductor. If r epair or replac em ent of the electric cord or plug is necessary, do not connect the equi pment-grounding conduc tor to a live terminal.

Check with a qualified electrician or service personnel if the grounding instructions are not completely understood, or if in doubt as to whether the tool is properly grounded.

Repair or replace a damaged or worn cord immediately.

The Lathe will operate on single phase or three phase, 230 v olt power suppl y. The Lat he shoul d be connected to a dedi cated circuit. Mak e sure the characteristics of your power supply match the specifications on the motor plate of the Lathe.

Single Phase Operation

A three wire pigtail for use on 230 volt single phase power is attac hed to the invert er and may be “hard-wired” to the power source, or connected to a UL/CSA listed r ec eptacle plug.

Connect the 230 volt supply to the black and white leads and ground the green lead.

If you are hard-wiring the Lathe to a panel, make sure a disconnect is available for the operator. Duri ng hard-wiring of the Lathe, m ake sure the fuses have been removed or the breakers have been tripped in the circuit to which the Lathe will be connected. Place a warning placard on the fuse holder or circuit breaker to prevent it being turned on while the machine is being wired.

Three Phase Operation

If three phase power is used, it will be necessary to replace the pigtail wire attached to the inverter with a 12/4 wire and c onnect the three hot leads to t he inver ter at R, S, T as shown in the wiring di agram on page 40. Always connec t the ground lead.

Recommended Gauges (AWG) of Extension Cords

Extension Cord Length *

100

150

Amps

< 5 16 16 16 14 12 12

5 to 8 16 16 14 12 10 NR

8 to 12 14 14 12 10 NR NR 12 to 15 12 12 10 10 NR NR 15 to 20 10 10 10 NR NR NR

feet

200 feet

Extens ion cords

If an extension cord is necessary, make sure the cord rating i s suitable for the am perage listed on the machine’s motor plate. An undersized cord will cause a drop in line voltage resulting i n loss of power and overheating.

Use the chart i n F igur e 13 as a gener al gui de i n choosing the cor rect size cord. If in doubt, use the next heavi er gauge. The smaller the gauge number, the heavier the cord.

Adjustments

Headstock and Tailstock Movement

To slide the headstock or tailstock, swing the locking handle (A, Figure 14) backward or forward until the headstock/tailstock can slide freely. When the headstock/tailstock is positioned, r otate the locking handl e to tighten it securely.

21 to 30 10 NR NR NR NR NR

*based on li miting th e lin e vol tage drop to 5V at 150% of the rated amp eres.

NR: Not Recommended.

Figure 13

Figure 14

To remove headstock, tailstock or toolrest base from the bed, unscr ew and rem ove ei ther of t he stop bolts (B, Figure 14). After re-mounting these items on the Lat he, re- insert the stop bolt.

For most turning operations, except outboard turning, the headstock should be positioned at the left end of the bed, and only the tailstock moved to accomodate the workpiece.

Cam Tightness

If the headstock, t ailstock or tool rest base does not tight en properly down agai nst the Lathe bed when the locking handle is tightened, it may need adjusti ng. Figure 15 uses the tail stock as the example:

1. Unscrew and remove the stop bolt on the end of the lathe bed (B, Figure 14) and sli de the tailstoc k off the end of the bed.

2. Turn the tailstock on i ts side, and tighten the lock nut with a wrench. See Figur e 15.

3. Mount tailstock on bed and insert the stop bolt.

Tool Support

A 14” tool support is provided wit h your Lat he. I t is designed to allow adjustment for height, position on the bed, and angle to the work.

Figure 15

Loosen the locking handle on the tool support base (C, Figure 16) to slide the support base forward or back, and to angle it to the bed. Tighten the locking handle firmly before operating the Lathe.

Loosen the small handle (D, Fi gure 16) to raise or lower the tool support and angle it to the work. Tighten the handle before operating the Lathe.

The small handl e (D, Fi gure 16) can be insert ed into one of thr ee hol es on the tool support ba se. The position sho wn in Figure 16 i s preferred so that the locking handle contacts the groove in the tool rest shaft.

Locking Handles

Each small loc king handle such as D, F igure 16 can be rotated to a more convenient position. Simply lif t up on the handle, rot ate it on the pin, then release i t , maki ng sure i t seat s it self on the pin.

Figure 16

Live Center and Cone

The live center cone, shown in Figure 17, screws clockwise onto the threads of the live center body.

To remove the cone from the live center, first insert the liv e center pin through t he hole in the live center body as shown in Figure 17. If the pin will not insert at first, rotate the cone until the pin can be inserted. T he cone can now be removed by holding t he body stati onary while unscrewing the cone.

Indexer

The indexer allows you to cut evenly spaced features in a workpiece while keepi ng the Lathe headstock spindle locked; for example, when cutting flutes on a spindle blank with a router, while the spindle blank is secured within the Lathe centers.

There are 12 holes i n the spindle collar spaced 30° apart, and 4 holes in t he headstock ca sting which accept the i ndex pin (see Figures 18 and

19). The combination of holes will allow you to

mark your workpiec e for evenly spaced features.

1. To use the indexer, thread the index pin (Figure 18) into one of the four holes until the index pin engages the spindle and prevents it from turning. This will be your first indexing position.

2. Unscrew and remove the index pin, and look down the hole, carefully counting the number of holes as you rotate the spindle using the hand wheel. Conti nue to rotat e the spindle until you reach the hole needed for your second fl ute cutting, then re-insert the index pin.

Figure 17

Figure 18

3. Ref er to the more det ailed instructions and chart on page 28 to determine in which holes to place the index pin relative to the number of flut es desired in your workpiece.

NOTE: Remove index pin before turning on the Lathe.

Centers – Installing and Removing

1. Disconnect Lathe f rom power source.

2. To install a spur center or live center (the spur center should f irst be mounted to your workpiece; see under “Operation” for more details), clean the taper ed end of t he center and the inside of the headstock taper spindle, then push the center into the headstock spindle.

Figure 19

3. To remove a spur center or liv e center, first remove the workpiece from the Lathe. Insert the knockout rod (Figure 20) through the hole in the handwheel and firmly tap the tapered end of t he spur center. The sli ding collar on the knockout rod helps give the necessary impact without having to use a mallet against the end of the rod.

IMPORTANT: Hol d the center by either placi ng your thumb and forefinger on the outside diameter of the spur center, or wrapping the center with a rag. The c enter c an be damaged if allowed to fall.

Face Plate – Installing and Removing

1. Disconnect Lathe f rom power source.

2. Mount the face plate to your bowl blank.

3. Push in the spindle lock button (Figure 21) and rotate the handwheel slightly until the spindle locks. Keep the spindle lock button pushed in.

4. Instal l t he face pl ate onto the t hreads of the headstock spindle and rotate clockwise hand-tight. When the Lathe is turned on (forward rotation), the rotational force will snug the face plate even further onto the threads.

Figure 20

Figure 21

If at any time you will be

reversing spindle rotation, make sure the two set screws in the face plate are tight! One of these is shown in Figure 22. Failure to do this may cause th e face plate to loo sen from the headstock spindle.

5. To remove the face plate, loosen the two socket set screws (Figure 22). Engage the spindle lock button and turn the face plate counterclockwise with the face plate wrench, as shown in Fi gur e 21.

Comparator – Installing and Using

The spindle comparator consists of two comparator centers inserted i nto the brack ets at the back of the Lathe. The c om par ator is used to mount a finished, or “reference spindle” from which measurements can be taken, the measurements being transferred to the new piece which i s bei ng turned.

The guard must be removed

to use the spindle comparator. Use caution and wear a face mask when turni ng without the guard installed.

Figure 22

1. Remove the guard from the headstock bracket.

2. Install the comparator spur center into the headstock bracket, by lifting up on the spring pin and i nserti ng the comparat or spur center until its point is about even with the point of the spur center in the headstock spindle. See Figure 23. The spring pin in t he bracket should engage one of the holes in the comparator c enter at this position.

3. Install the rear comparator center in the tailstock bracket and tighten the bracket handle. See Figure 24.

4. Mount the spur center with the spindl e blank that you will be t urning. Loosen the t ailstoc k locking handle, and slide the tailstock until the live center is about 1-inch from the spindle blank, then tighten the locking handle. Advance the live center using the tailstock handwheel, until the live center is secured in the spindle blank.

5. Mount the reference spindle between the comparator centers, as shown in Figure 24.

NOTE: The reference spindle should be mounted last after all adjustment of the tailstock and ram has been accomplished with the spindle blank. Likewise, when turning operation is complete, remove the reference spindle first.

Figure 23

Figure 24

(shown with optional 18” bed extension)

Speed Change

1. Disconnect Lathe f rom power source.

2. To change speed ranges, pull open the access door on the headstock.

3. Loosen the pivot lock handle (A, Figure 25) and lift up the tensi on handle ( B, Fi gure 25) to raise the motor. Tighten the pivot lock handle (A, Figure 25) to hold the motor in the raised position.

4. There should be sufficient slack in the belt to reposition it to the other steps on the sheaves. The label on the access door shows the required belt position.

5. Loosen the pivot lock handle (A, Figure 25) and lower the m otor to tension the belt. Be sure that the Pol y-V groov es of the belt seat properly i n the corresponding groov e of the sheave. Do not overtension; a very light pressure on the tension handle (B, Figure

25) is adequate to prev ent belt slippage.

6. Tighten the pivot lock handle (A, Figure 25).

Figure 25

Belt shown in LOW speed range pos ition

Sheave and Belt Alignment

The motor and spindl e sheav es are al igned wit h each other at the factory, but if any service is performed t hat affects their alignment it is v ery important that they be realigned. To realign them, loosen the two set scre ws on the spindle sheave (C, Figure 25) with a hex wrench, and slide the spindle sheav e into the proper posi tion. Re-tighten set screws.

When sheaves and belt are properly aligned, there should be no unusual pulsing sounds or noise coming from the belt.

Checking Spindle Play

The spindle beari ng has been set at t he factory for general turning applications. There should be no "end play" or looseness along the spindle’s axis. If any looseness should ev er occur, it may be rectified by carefully tightening the bearing lock nut on t he spindle, as follows. (See Fi gure

26).

1. Use a screwdriver to carefully bend back any tabs on the tabbed lock washer (C, Figure 26) that interfere with the insets (B, Figure 26) on the spanner nut.

2. Place the end of a flat head screwdriver down against one of the insets of the bearing lock nut (B, Figure 26) .

3. Tap the handle of the screwdriver with a mallet so that it turns the spanner nut (A, Figure 26) tighter in a clockwise direction. Rotate the spanner nut only about 1/16” at a time.

Do not overtighten the

spanner nut or the spindle bearings will overheat.

4. The spanner nut should be tightened just enough to remove the end play and the spindle should still rotate very freely. Run the lathe f or a tim e, and chec k f or heat fr om the spindle bearings. If the bearings are running hot, t he spanner nut is too t ight and should be loosened slightly.

5. After the spanner nut (B, Figure 26) has been properly adj usted, carefully bend back into place any tabs on the tabbed lock washer (C, Figur e 26).

Figure 26

Sheave/Drive Belt Replacement

Replacing t he spindle sheav e can be a diffic ul t procedure; it is recommended that the headstock be taken to an authorized service center for this.

1. Disconnect Lathe f rom power source.

2. Loosen the pivot lock handle (A, Figure 25) and lift up the tensi on handle ( B, Fi gure 25) to raise the motor.

3. Tight en the pivot l ock handle (A, Figure 25) to hold the m otor i n the rai sed positi on. Sli p the belt off the pulleys.

4. Loosen the two set screws on the handwheel (A, Figure 26) with a hex wrench, and pull the handwheel off the headstock spindle.

5. Loosen and rem ove the beari ng lock nut (B, Figure 26) and tabbed lock washer (C, Figure 26).

6. Slide the spindle a little way out of the headstock, just enough to remov e sheave or belt.

NOTE: You m ay have to tap t he end of the spindle with a wood block to move it. (Do NOT use a steel face hammer directly against the spindle.)

7. If replacing the spindle sheave, loosen the two set scre ws (C, Figur e 25), and sli de the sheave off the spindle.

8. Install the new spindle sheave, loosely securing the two set screws. Make sure the sheave is oriented properly.

9. Slide the spindle back into place, install tabbed lock washer (C, Figure 26), and bearing lock nut (B, Figure 26). Check for any spindle play at this point (See “Checking Spindle Play” section).

10. Re-i nstall t he handwheel and t i ghten t he set screws (A, Figur e 26).

11. Al ign the new sheave ( see “Sheave and Belt Alignment”) then tighten the two set screws (C, Figure 26) securely on the sheave.

12. Loosen the piv ot lock handl e and lower the motor using the tension handle. Re-tighten the pivot lock handle.

Operating Controls

See Figure 27. (A) On/Off Button: P ush i n to stop the machine;

pull out to start the Lathe. NOTE: If there is a power outage while

operating the Lathe, the Lathe will not automatically restart once power is restored. Cycle the on/off switch in order to restart the machine.

Figure 27

(B) Forward/Reverse

When turning with a face

plate, make su re bo th set screw s on the face plate are tight (see Figure 22) before reversing th e spindle. Failure to comply may cause the face plate to spin loose from the spindle.

at the lowest speed, with the dial rotated all the way counter clock wise.

A.C. Inverter (mounted to rear of headst oc k )

The 3520B Lathe us es the latest technology in A.C. inv erter drives to provi de infinitely variabl e spindle speeds within the specified ranges (shown under “Specifications” on page 6). The inverter controls the speed of the motor by varying the f requency of the v oltage supplied to the motor. The inv erter provides an accel eration ramp that eliminates the shock of normal starting. Al so, a braking feat ure eliminates long coasting peri ods after the Lathe is turned off.

The 2 horsepower motor is specially designed for use with inverter drives, and is balanced to reduce noise and minim iz e v ibr ation.

The A.C. Inverter does not require any programming – it is pre-programmed from the factory. The buttons on the face of the

inverter sho uld never b e pu shed at an y time.

Use only the controls on the front of the headstock.

If you suspect there is a problem with the inverter or the inverter settings, contact WMH Tool Group tec hnic al service at 1-800-274-6848.

Operation

The information which follows is general in nature and is not intended to be a complete course in wood turning. Nothing can r eplace the knowledge gained by talking with experienced woodturners or consulting books, articles, etc. Above all, simple trial and error will aid in develop in g proficiency in the craft.

Inspection

Before operating the lathe, check that ev er ything is in proper worki ng or der :

1. Level your machine; use the adjustable levelers t o help r educ e v ibr ation.

2. Check bearings; adjust only if endplay exists.

3. Check belt ; it should be snug but not ov erly tight.

4. Bed ways; keep clean, use steel wool to remove any r ust spots, and apply paste wax to prevent buildup of rust and finishes.

5. Tool support; u se a m ill fil e to remov e nicks and dings.

6. Spindle tapers; shoul d be clean and free of dust and chips for proper seating of tapers.

7. Tailstock; clean and lubricate ram and locking device.

Lighting; proper lighting i s essential to elim inate shadows and reduce eye strain.

Turnin g To ols

If possible, select only quali ty, high-speed steel turning tools. High-speed steel tools hold an edge and last longer t han ordinary carbon steel . As one becomes proficient in turning, a variety of specialt y tool s for specif ic appli cati ons can be acquired. T he following tool s provide the basics for most woodturning pr ojects (see Figure 28):

Skews – 1-1/2" and 1" or 1-1/4", used to make finishing cuts and details.

Large Roug hing Go uge – 1" to 1-1/4" , used to eliminat e waste wood.

Spindl e Gouge s – 1/4", 3/8", 1/2", used to t urn beads, coves and other details.

Deep Fluted Bow l Gouge – 1/4" , 3/ 8" and 1/ 2", used for turning bowls & plates.

Square Scraper ( Bedan) – 3/ 8” or 1/ 2", used to create square shoulder s.

Large Round Nose (Domed) Scrap er – 1-1/2", used to reduce ridges on interior of bowls, round edges of bowls, etc.

Parting Tool - 1/8", used for scraping, m aking a cut-off, or to set diameters for sizing.

For safety and best performance, keep tools sharp. If a tool stops cutting or requires excessiv e pr essure to make a cut, it needs to be sharpened. A number of brand name sharpening jigs and fixtures are available; however, a woodturner should learn to sharpen tools freehand. For best results, use a slow speed grinder (1800 rpm) fitted with a 60-grit aluminum oxi de wheel (for shapi ng) and a 100grit al um. oxide wheel (for fi nal sharpening and touchup). The grinder should be located near your lathe and at a comfortable height. A diamond dresser will keep the wheel s true and eliminat e gl azi ng.

Never allow the tool t o rest in one place on the wheel, keep it moving and use a li ght touch.

Figure 28

Basic Turning Tools

Carbon steel tools can overheat easily and should be cooled frequently. If the edge turns blue, it has l ost its temper and should be ground past the blue area.

High-speed steel tools are not as likely to overheat, but can be damaged i f allowed to get red hot. High-speed steel tools should not be quenched for cooling. Honing with a diamond lap or slipstone will save trips to the grinder and keep the edge fresh.

Spindle Turning

Spindle t urning t akes place bet ween the c enter s of the lathe. It requires a spur or driv e center in the headstock and a live or dead center in the tailstock. A cup c enter r ather t han a cone cent er in the tailstock will often reduce the risk of splitti ng the stock .

Figure 29 shows the basic profile shapes in spindle turning.

Stock Sele ct ion

Stock for spindles should be straight grained and free of checks, cracks, knots and other defects. It should be cut 1/8" t o 1/4" larger than the finished di am eter and may requi re additi onal length so the ends can be rem ov ed later . Larger stock should have the corners removed to produce an octagon m aking the piece easier to rough down to a cyli nder.

Figure 29

1. With a combi nation square, or plasti c c enter finder for round stock, locate and mark center on each end of the workpiece. Accuracy is not critical on full rounds but extremely impor tant on stock where square sections are to rem ain. Put a dimple in t he stock with an awl or nail, or use a springloaded automatic center punch.

2. Extremely hard woods may requi re kerf s cut into the ends of the stock (Figure 30) using a band saw, so the wood will accept the spur center and the live center.

3. Drive the spur center about 1/4” into the workpiece, using a wood mallet or dead blow hammer as shown in Figure 31. Be careful that you do not split the workpiece.

Never use a steel f ace hammer and never drive the workpi ece onto the spur center while it is mounted in the Lathe spindle.

4. Make sure the headstock is locked to the Lathe bed.

5. Clean the tapered end of the spur center and the inside of the headstoc k spi ndle.

6. Insert the tapered end of the spur center (with the attached workpiece) into the headstock spindle.

Figure 30

Figure 31

7. Support the workpiece while bringing the tailstock into position about 1” away from the end of t he workpiece. Lock t he tailstock to the bed.

8. Advance the tailstock spindle with the handwheel in order to seat the live center into the workpiece. Use enough pressure to secure the workpiece between the centers so that it won’t fly off, but do not use excessiv e pressure.

9. Tighten the spindle locking handle.

The tailstock ram is capable

of exerting excessive pressure against the workpiece and the headstock. Apply only sufficient force with the tailst ock to hold the workpiece securely in place. Excessive pressure can overheat center bearings and damage both workpiece and Lathe.

10. Mov e tool support i nto positi on. It should be parallel to the workpiece, just below the centerline and approximately 1/8" to 1/4" from the corners of the workpiece to be turned, as in Figure 32. Tighten support base to Lathe bed.

11. Rotate workpiece by hand to check for proper clearanc e.

12. Star t lat he at lowest speed and bring i t up to the appropriate RPM for the size of workpiece used. Consult digital readout on the headstock.

Cutting Techniques

Figure 32

Roughing Out

1. Begin with a large roughing gouge. Place the tool on the tool support with the heel of the tool on the surface to be c ut.

2. Slowly and gently raise tool handle until cutting edge comes into contact with the workpiece.

3. Begi nning about 2” fr om the tailstock end of the workpiece, roll the flute (hollowed-out portion) of t he tool in the directi on of the cut. See Figure 33. Make long sweeping cut s in a continuous motion to rough the piece down to a cylinder.

4. Keep as much of the bevel of the tool as possible in contact with the workpiece to ensure control and avoid catches. NOTE: Always cut down-hil l, or f rom large diamet er to small diameter. Always work toward the end of a work-piece, never start cutting at the end.

Figure 33

5. Once the workpiece is roughed down to a cylinder, smooth it with a l arge skew. Keep the skew handle perpendi c ular to the spindle and use only the center third of the cutting edge for a l ong smoothi ngcut (touchi ng one of the points of the skew to the spinning workpiece may cause a catch and ruin the workpiece).

6. Add details to the workpiece with skew, parting tool, scraper or spi ndle gouge.

Beads

1. Make a parti ng cut f or what is to be a b ead to the desired depth. Place the parting tool on the tool support and move tool forward to make the full bevel of the tool come in contact with the workpiece. Gently raise handle to make cut to the appropriate depth.

2. Repeat for other side of the bead.

3. Using a small skew or spindle gouge, start in the center between the two cuts and cut down each side to form the bead. Roll the tool in direction of cut.

Coves

1. Use a spindle gouge. With the flute of the tool at 90 degrees to the workpiece, touch the point of the tool to the workpiece and r oll in towards the bottom of the cove. See Figure 34. Stop at the bottom; attempting

to go up the opposite side may cause the tool to catch.

2. Lightly mark the center of the "V" wit h the tip of the skew.

3. Move the poi nt of the skew to the right half of the desired widt h of your c ut.

4. With the bevel parallel to the right si de of the cut, raise the handl e and push the tool in to the desired depth, as shown in Figure 35.

Figure 35

5. Repeat from the left side. The two cuts should meet at the bottom and l eave a clean "V" cut.

6. Additional cuts may be taken to add to either the depth or width of the cut.

Parting Off

1. Use parting tool.

2. Adjust l athe speed to lower RPM for parti ng through a workpiece.

Figure 34

2. Mov e the tool over the desir ed width of the cove.

3. With the flute facing the opposite direction, repeat step 1 f or other side of cov e. Stop at bottom of cut.

"V" Cuts

1. Use the long poi nt of the skew. (NOT E: Do not press the long poi nt of the skew directl y into the workpi ece to creat e the "V"; t his will result in a burned or burnished "V" with fibers being r olled up at both sides.)

3. Place tool on tool support and raise the handle until it starts to cut and continue to cut toward the cent er of t he workpiece.

4. Loosel y hold on t o the piece i n one hand as it separates from the waste wood.

Sanding and Finishing

Leaving clean cuts will reduce the amount of sanding required. Move the tool support out of the way, adjust the lathe to a low speed, and begin with fine sandpaper (120 grit or finer). Coarser sandpaper will leave deep scratches that are diff icult to r emove, and dull crisp detail s on the spindle. Progress through each grit without skippi ng grits (for example, do not jum p from 120 grit to 220 grit). Fold the sandpaper into a pad; do not wrap sandpaper around your fingers or the workpiece.

To apply a finish, the workpiece can be left on the lathe. Turn off the lathe and use a brush or paper towel to apply the finish. Remove excess finish before restarting lathe. Allow to dry and sand again with 320 or 400 grit sandpaper. Apply second coat of fi nish and buff.

Face Plate and Bowl Turning

Face plate turning is normally done on the inboard side of the headstock over the bed. Larger workpieces must be turned on the outboard side (r em ove t ailstoc k and tool support base, and move headstock to opposite end of bed). See Figure 9.

Mounting Stock

Use of a face plat e i s the m ost c ommon m ethod for holdi ng a block of wood for turning bowls and plates:

1. Select stock at least 1/ 8" to 1/4" larger than each dimension on the finished workpiece.

2. Always select the largest diameter fac e plate that can be used for the workpiece to be turned.

3. True one surface of the workpiece for mounting against the face plate.

4. Using the face plate as a tem plate, mark the location of the mounting holes on the workpiece, and drill pilot holes of the appropriate si ze. Face plates are dri lled for No. 12 screws. (Phillips and square drive screws will hold up better than slotted screws. Sheel metal screws are case hardened with deeper and sharper threads than wood screws.)

If the mounting screws on the face plate interfere with the workpiece, a glue or waste block can be used:

5. Make a block the same diameter as the face plate, Figure 36. Both glue block and workpiece should have flat surfaces for gluing.

6. Glue the block to the workpi ec e. Avoid using brown paper or newspaper between the block and workpi ece. I t may work fi ne if y ou are using scrapers, but a slight catc h with a bowl gouge can separate the two.

NOTE: When using a gl ue bl ock, be caref ul wit h the adhesiv e you select . Dry workpiec es can be bonded with ordinary white or yellow glue but must be clamped to ensure a g ood bond. G reen workpieces require cy anoac r y late type glue.

Faceplate or Chuck?

While facepl ates are the sim plest, most reliabl e method of holding a block of wood for turning, chucks can also be used. As there are dozens of chucks to choose from, the woodturner should first consi der all the different types of t ur ning that will be done, and read reports or discuss with other turners who o wn c hucks before making a decision.

A chuck is not a r equir ement, but is handy when working on more than one piece at a time. Rather than rem oving screws, y ou simply open the chuck and change workpi ec es.

The most popular ones are four jaw scroll chucks with a variety of jaws to accomodate different size tenons. Most also come with a screw chuck as well .

Wood Selection

Firewood is the cheape st, most widely av ailable stock to use whil e l earni ng to t urn bo wls. Si m ply waste wood for a while practicing turning techniques. Develop skill with each tool before attempting t o make a finished piec e. It is best to start with dry wood, without worrying about drying or distortion. Once turning becomes comfortable, try green wood which cuts very easily. As the tur ner gains exper ienc e, he or she will find extraordinary grain and figure in the form of burls, crot c hes and bark inclusions.

Figure 36

Checks and Cr acks

Green wood will check and crack. For best results, leave logs in as long a lengt h as you c an handle. As the material starts to dry, surface cracks will develop on the ends of the log. Cut off two to three inches and you should find good, sound wood. Also cut the log in half al ong the pith to avoid having it in the fi nished pi ece. Most checks radiate f rom the pith. As you turn bo wls from green wood, make sure you maintain a consistent wall thickness throughout the piece. Leaving a pi ece thick i n some areas and thin i n others will cause the wood to dry unevenly and promote checks and crac k s.

Distortion

Distortion is a problem associated with turning green wood. It will vary from one type of wood to the next. Typically, fruitwoods tend to distort more than others. It also varies wit h the time of year the tree was cut and how the logs are stored.

Tools for Bowl Turning

The deep fluted bowl gouge is the most essential and versatile tool for most bowl and plate turning. The bowl gouge is heavier and easier to control than other types of gouges. It also allows removal of wood much faster and with less vibration than other gouges. Most average sized bowl work can be accomplished with a 3/8" or 1/2" bowl gouge. A 1/4" bowl gouge is best sui ted for smaller bowls and li ght finishing cuts. Larger 3/4" and 1" bowl gouges are only used for extrem ely lar ge pieces.

Large domed scraper s can also be u sed to help clean up the interior surfaces of bowls. A light touch with the scraper sli ghtly tilt ed will eliminate some of the ridges occasionally left by an inexperienced bowl gouge.

Bowl Turning Techniques

7. As the bowl takes shape, work on the bottom (tailstock end) to accomodate attaching a face pl ate.

8. Turn a short tenon (about 1/ 8" l ong) the si ze of the hole in the facepl ate. See Figure 37. This will all ow centeri ng the workpi ece when the faceplate is attached.

Figure 37

9. (NOTE: If you plan to use a chuck, turn a tenon of t he appr opriate length and diameter to fit your chuck.)

10. Stop the lathe, remove workpiece and attach face plate or chuck (see "Mounting Stock" above).

To Shape Outside of Bowl

1. Odd shaped burls, crotches and other irregular shaped blanks require special preparation before mounting in a chuck or onto a faceplat e. Remove the bark, if there is any, from what appears to be the c enter of the top of the workpiec e.

2. Drive spur center into the top of the workpiece with a mallet or dead blow hammer.

3. Slip the spur center i nto t he headstock t aper and bring the tailstock with a live or ball bearing center into position. Lock the tailstock to the bed and advance the tailstock spindle in order to seat the cup center into the workpiece. Tighten the ram locking handl e.

4. Turn workpiece by hand to ensure proper clearance.

5. Start lathe at lowest speed a nd bri ng it up to the maximum safe speed for the size of work to be turned (see page 30). If the machine starts to vibrate, lower the speed until vibration stops.

6. Rough out the outside of the bowl with the 1/2" deep fluted bowl gouge, holding the handle of the t ool firmly against your hip. For best control, use your whole body to move the gouge through the workpiece.

The surfaces of faceplate and

workpiece should mount flush to each other.

11. Finish turning the outside of bowl with 1/2" or 3/8" bowl gouge. Leave additional material at base of bowl for support while turning interior. This will be removed lat er.

To Shape Interior of Bowl

1. Stop the lathe and move tailstock away. (You may want to remove the center from the tailstock to prevent bumping it with your elbow.)

2. Adjust tool support in front of the bowl just below centerline, at a r ight angle t o the lathe ways.

3. Rotate workpiece by hand to check clearance.

4. Face off top of bowl by making a light shearing cut across the top of workpiece, from rim to center.

5. Place 1/2" bowl gouge on tool support at center of the workpiece with t he flute fac ing top of bowl. The tool handle shoul d be level and pointed toward the f our o'cl ock position, as shown in Figure 38.

Figure 38

6. Use the l eft hand to control cutting edge of gouge, while right hand swings tool handle around toward your body (Figure 38). The flute should start out facing top of workpiece, and rotate upward as it mov es deeper into the bowl to m aintain a cl ean even c urve. As the tool goes deeper into the bowl, progressively work out toward the rim. It may be necessary to turn the tool support into the piece as you get deeper into the bowl.

pressure. Coarser sandpaper tend s to leav e deep scratches that are hard to eliminate. Use power-sanding techniques to avoid concentric sanding marks around your finished piece. Avoid rounding over the rim and foot wit h sandpaper; try to keep detail s crisp. Finish sanding wit h 220 gr it.

3. Remove sanding dust with tack rags or compressed air and, with lathe turned off, apply first c oat of finish. Let stand for several minutes, wipe of f excess. Allow to dry before sanding again with 320 or 400 grit sandpaper.

4. Turn lathe back on and continue the separation cut almost all the way through the base. Stop at abo ut 3" and use a smal l fine tooth saw to separate t he bowl from t he waste.

5. Apply second finish coat and allow to dry before buffing.

Maintenance

(NOTE: Try to make one, very light continuous movement from the rim to the bottom of the bowl to ensure a clean, sweeping curve through the piece. Should there be a few small ridges left, a light cut with a large domed scraper can even out the surface.)

7. Develop wall thickness at the rim and maintain i t as you work deeper int o the b o wl (Once the piece is thin toward the bottom, you cannot mak e it thinner at the rim). When the interior is fi nished, move t he tool support to exterior to re-define bottom of bowl. (General r ule of thumb: the base shoul d be approxim ately 1/3 the overall diam eter of the bowl).

8. Work the tight area around faceplate or chuck with 1/4" bowl gouge.

9. Begin t he separation with a part ing tool, but do not cut all the way through yet .

Sanding and Finishing

1. Remove the tool support and adjust lathe speed to approximately 500 RPM. High speed can build friction while sanding and cause heat check in some woods.

Before doing maintenance on

the Lathe, disconnect it from the electrical supply by pulling out the plug or switching off the main switch. Failure to comply may cause serious injury.

Maintenance on the 3520B Lathe should be performed at periodic intervals to ensure that the machine is in proper working order, that all fasteners are tight, and all necessary adjustments have been made. Inspection and maintenance shoul d be perfor med at least t wice a year, but more fr equently if t he Lathe receives constant use.

Clean and oil the lathe bed(s) so that headstock, tailstock and t ool support base will slide easily. Clean any rust spots that may develop on the bed with a commercial r ust r em ov er.

Use compressed air to blow out the interior of the headstock, in order to keep sawdust and chips from accumulating on belts and sheav es. Also blow off debris that accumulates on the inverter. Do not disassemble inverter to clean!

Frequently clean out the morse tapers on both headstock and tai lstock. Com mercially av ailable taper cleaner s may be ac quir ed from tool stores.

2. Begin with fine sandpaper (120 grit) and progress through each grit, using only light

Indexer Positions

How to use the chart

The indexer is shown as viewed from the tailstock end of the Lat he. Poi nts A, B, C and D are the hole s in the head ca sting. The holes in the spindle collar may be considered as numbered 1 through 12.

Example: You wish to rout 9 flutes on your spindle blank. Locate the “9” in the “No. of Flutes” colum n; each fl ute angle will be 40° . The index pin should first be inserted into hole combination “A-1”. Make your first flute at this position. Back off the index pin and rotate the spindle until the index pin can be inserted into hole combination “A-5”; this will be followed by “A-9”. Succeeding flutes will be made with the index pin in the B position: “B-2”, “B-6” and so on.

No. of Flute s

360° divided by...

1 360.00 A 1

Angle Letter # Letter # Letter # Letter #

2 180.00 A 1,7 3 120.00 A 1,5,9 4 90.00 A 1,4,7,10 5 72.00 ----------------------- 6 60.00 A 1,3,5,7,9,11 8 45.00 A 1,4,7,10 D 2,5,8,11

9 40.00 A 1,5,9 B 2,6,10 C 4,8,12 10 36.00 ----------------------- 12 30.00 A 1 to 12 15 24.00 ----------------------- 16 22.50 ----------------------- 18 20.00 A 1,3,5,7,9,11 B 2,4,6,8,10,12 C 2,4,6,8,10,12 20 18.00 ----------------------- 24 15.00 A 1 to 12 D 1 to 12 30 12.00 ----------------------- 36 10.00 A 1 to 12 B 1 to 12 C 1 to 12

other interesting patterns....

18 20.00 A 1,3,5,7,9,11 B 1,3,5,7,9,11 C 1,3,5,7,9,11

NOTE: A dashed line indicates t hat particular set of angles is not pos s ible with the indexer.

Figure 39

Troubleshooting

Trouble Probable Cause Remedy

Motor fails to develop full power.

Motor or spindle stalls or will not start.

Excessive vibration.

Power line overloaded. Correct overload c ondition. Undersize wires in power supply

syste m. Faulty inverter. Contact WMH Technical Service. Worn motor. Replace motor. Excessive cut. Reduce depth of cut. Improper belt adjustment, or worn or

broken belt. Improper cooling of motor. Blow out sawdust from m otor housi ng

Worn spindle beari ngs. Replace bearings. Worn motor. Replace motor. Workpiec e warped, out of r ound, has

major flaw, or was improper ly prepared for tur ning.

Worn spindle beari ngs. Replace spindle bearings. Worn drive belt. Replace driv e belt. See pages 18-19.

Increase supply wir e si z e.

Adjust or replace belt as needed (see pages 18-19).

fan.

Correct problem by planing or sawing workpiece, or discard entirely and use new workpiece.

speed only.

Tools tend to grab or dig in.

Headstock moves when applying pressure with Tailstock.

when applying pressure.

Motor mount loc k handl e is l oose. Tighten loc k handl e ( A, Figure 25) . Lathe on uneven surface. Adjust lev eler s. Potentiometer faulty. Replace potentiometer. Lathe runs at one Electroni c AC inver ter is not

programmed pr operl y , or is defective, or there is loose wiring.

Dull tools. Keep tools sharp (see page 21). Tool support set t oo low. Reposition tool support height. See

Tool support set t oo far from workpiece.

Improper tool being used. Use correct tool for operation. Excessive pressure being applied by

tailstock (more than 500 lbs. of force).

Cam lock nut needs adjusting. Tighten cam lock nut (Figure 15). Tailstock moves Lathe bed and tailstock mating

surfaces are greasy or oi ly.

Contact WMH Technical Service to help identify problem; 800-274-6846.

page 23. Reposition tool support closer to

workpiece (page 23).

Slide headstock t o the left end, then apply pressure to workpiece with tailstock. Apply only suffici ent force with tailstoc k to hold workpiece securely in place.

Remove tailstock and clean surfaces with a cleaner/degreaser. Re- apply light coat of oil to Lat he bed surface.

Recommended Lathe Speeds (per diameter of workpiece)

DIAMETER OF WORK ROUGHING RPM

Under 2" 1520 3000 3 0 00

2 to 4" 760 1600 2480 4 to 6" 510 1080 16 50 6 to 8" 380 810 1240

8 to 10" 300 650 1000 10 to 12" 255 540 830 12 to 14" 220 460 710 14 to 16" 190 400 620

16" to 20" 175 325 500

GENERAL CUTTING

RPM

FINISHING RPM

20" to 24" 175 260 400

Replacement Parts

Replacement part s are li sted on the f ollowing page s. To order par ts or reac h our servi ce depar tment, call 1-800-274-6848 between 7:30 a.m. and 6:00 p.m. (CST), Monday through Friday. Having the Model Number and Serial Number of your machine available when you call will allow us to serve you qui c kl y and accurately.

Headstock Assembly

Parts List: Headstock Assembly

Index No. Part No. Description Size Qty

1............... 6294736..................Faceplate...........................................................3” ...............................1

2............... 6295796..................Nyloc Insert Socket Set Screw........................... 1/4-20x3/8” ................4

3............... 6294725..................Spur Center.......................................................MT2 ...........................1

4............... 3520B-204 .............. Spindle.............................................................. ...................................1

5............... 3520B-205 .............. Key.................................................................... 8x8x75........................1

6............... 3520B-206 .............. Key.................................................................... 8x8x45........................1

7............... BB-6207ZZ.............. Bearing.............................................................. 6207ZZ.......................2

8............... 3520B-208 .............. Bushing............................................................. ................................... 1

9............... 3520B-209 .............. Cushion............................................................. ...................................1

10.............3520B-210 .............. Headstock ......................................................... ...................................1

11.............BB-6206VV ............ Bearing .............................................................6206VV...................... 1

12.............6864006.................. Bearing Lock Washer......................................... ................................... 1

13.............6549006.................. Bearing Nut....................................................... ...................................1

14.............3271081.................. Handwheel ........................................................ ...................................1

15.............TS-0270011............Socket Set Screw.............................................. 5/16-18x1/4” ...............6

16.............6143004.................. Collar Retaining................................................. ...................................2

17.............6644005.................. Plunger ............................................................. ...................................1

18.............3064711.................. Lathe Guard Bracket.......................................... ...................................1

19.............6294728.................. Safety Guard..................................................... ...................................1

20.............JWL1642-164A ....... Inverter, VFD015S21A....................................... 2HP, 220V..................1

21.............6710015.................. Socket Head Cap Screw.................................... #10-24x1/2”..............10

22.............JWL1642-170.......... Signal Cord........................................................ ...................................1

23.............3520B-223 .............. Headstock Clamping Shaft................................. ...................................1

24.............TS-0640091............Nylon Lock Hex Nut........................................... 3/8”-16........................1

25.............6095038.................. Bushing............................................................. ...................................1

26.............6430045.................. Knob.................................................................. ...................................2

27.............3268219.................. Handle, Headstoc k ............................................ ...................................1

28.............3719189.................. Motor Sheav e .................................................... ...................................1

29.............2595036.................. Motor Assembly Plate........................................ ...................................1

30.............TS-0720091............Lock Was h e r......................................................3/8..............................3

31.............TS-0209061............Socket Head Cap Screw.................................... 3/8-16x1-1/4”..............3

32.............3520B-232 .............. Motor................................................................. 2HP, 220V, 60Hz........1

33.............JWL1642-166.......... Bracket.............................................................. ...................................1

35.............TS-0680042............Flat Washer.......................................................3/8..............................2

36.............6350031.................. Motor Plate Locking Handle............................... ...................................1

37.............JWL1642-130A ....... Digital Readout.................................................. ...................................1

38.............3520B-238 .............. Plate.................................................................. ...................................1

39.............3520B-239 .............. DRO Cover........................................................ ...................................1

40.............JWL1642-127.......... Tap Screw......................................................... M3x10 ........................4

41.............TS-0253031............Socket Head Button Screw ................................ #10-24x1/2” ................4

42.............JWL1642-134.......... Tap Screw......................................................... 1/4”x1/2”.....................2

43.............TS-1540011............Nut.................................................................... M3..............................2

44.............TS-2361031............Lock Was h e r......................................................M3..............................2

45.............JWL1642-135.......... Bracket.............................................................. ...................................1

46.............6295717.................. Knob.................................................................. ...................................1

47.............3520B-247 .............. Door Panel ........................................................ ...................................1

48.............3520B-248 .............. Speed Label...................................................... ...................................1

49.............6708019.................. Socket Head Cap Screw.................................... #8-32x5/8”..................2

50.............6365012.................. Door Hinge........................................................ ...................................1

51.............6295911.................. Pad.................................................................... ...................................1

52.............6860704.................. Flat Washer....................................................... #8...............................2

53.............6508007.................. Nut .................................................................... #8-32..........................2

54.............3520B-254 .............. Control Panel..................................................... ...................................1

55.............6295839.................. Push/Pull Switch................................................ ...................................1

56.............6821492.................. Switch Fwd/Rev................................................. ...................................1

57.............6295915.................. Control Pot Assembly........................................ ...................................1

58.............6813062.................. Spring................................................................ ...................................1

59.............3601006.................. Spindle Lock Plunger......................................... ...................................1

60.............3520B-260 .............. Control Label..................................................... ...................................1

61.............6294786.................. Spindle Lock Bracket......................................... ...................................1

62.............6077228.................. Micro V-Belt....................................................... 260J ...........................1

63.............3719188.................. Spindle Sheave ................................................. ...................................1

64.............3520B-264 .............. Locking Collar.................................................... ...................................1

65.............3058001.................. Clamp Bolt......................................................... ...................................1

66.............3092095.................. Clamp................................................................ ...................................1

67.............6520009.................. Nylon Lock Hex Nut........................................... 5/8”-11........................1

68.............6294787.................. Power Cord ....................................................... ...................................1

69.............6294790.................. Motor Cord........................................................ ...................................1

70.............JWL1642-165.......... Strain Relief ....................................................... ...................................3

71.............3520B-271 .............. Index Pin........................................................... .....................................

72.............6294744.................. Face Plate Wrench............................................ ...................................1

73.............3520B-273 .............. Set Screw .......................................................... #10-24x1”...................1

74.............6716139.................. Flat Head Socket Screw..................................... 3/8-16×1”....................4

75.............3520B-275 .............. Spindle Comparator Spur Center....................... ...................................1

76.............JWL1642-183.......... Cable Clamp...................................................... ...................................2

77.............TS-0560071............Hex Nut............................................................. #10-24........................ 2

78.............TS-081C082............ Phillips Pan Head Machine Screw ..................... #10-24x1-1/2”.............2

79.............TS-069204..............Washer.............................................................. #10 .............................2

80.............JML1642-169..........Braking Resistor................................................ ...................................1

81.............6430047.................. Knob.................................................................. ...................................1

82.............3520B-282 .............. Bracket.............................................................. ...................................1

83.............6295838.................. Phillips Round Head Machine Screw.................. M3x20........................2

84.............TS-1490021............Hex Cap Screw.................................................. M8x16 ........................1

85.............TS-0267021............Socket Set Screw.............................................. 1/4-20x1/4”.................2

................. 6294754..................Knockout Rod Assembly (includes i ndex # 86 thru 92) ...........................1

86.............TS-0270031............Socket Set Screw.............................................. 5/16-18x3/8” ...............1

87.............3520B-287 .............. Slide Hammer.................................................... ................................... 1

88.............3520B-288 .............. Slide Handle...................................................... ...................................1

89.............6295796.................. Nyloc Insert Socket Set Screw........................... 1/4-20x3/8..................2

90.............3520B-290 .............. Rod................................................................... ...................................1

91.............3520B-291 .............. Retaining Collar................................................. ................................... 1

92.............3520B-292 .............. Brass Tip........................................................... ...................................1

93.............3520B-293 .............. Inverter Label..................................................... ................................... 2

94.............3520B-294 .............. Warning Label ................................................... ...................................1

95.............3520B-295 .............. Cord Snap Ring................................................. ...................................1

96.............3520B-296 .............. Phillips Pan Head Machine Screw...................... M3-0.5Px10................3

Stand and Bed Assembly

Parts List: Stand and Bed Assembly

Index No. Part No. Description Size Qty

1............... 3520B-101 .............. Bed.................................................................... ...................................1

2............... 3520B-102 .............. Leg.................................................................... ...................................2

3............... 6295754..................Stop Bolt............................................................ ...................................2

................. 6294797..................Tool Rest Support Assembly (includes index #4 thru #12)...................... 1

4............... 3520B-104 .............. Tool Rest Support Base..................................... ...................................1

5............... 3520B-105 .............. End Cover......................................................... ...................................1

6............... 3520B-106 .............. C-Ring............................................................... S-22 ...........................1

7............... 6710015..................Socket Head Cap Screw.................................... #10-24x1/2” ................4

8............... 3520B-108 .............. Tool Support Rod............................................... ...................................1

9............... 6294763..................Locking Handle.................................................. ...................................2

10.............3520B-110 .............. Bolt.................................................................... ...................................1

11.............6294770.................. Clamp................................................................ ...................................1

12.............TS-0650081............Nylon Lock Hex Nut........................................... 3/4”-10........................1

13.............6294742.................. Tool Support...................................................... 14”..............................1

................. 6295902..................Live Center Assembly (includes index #14 thru #17) ..............................1

14.............6295905.................. Live Center Cone............................................... ...................................1

15.............6295904.................. Live Center Tip .................................................. ...................................1

16.............6295903.................. Live Center Body............................................... ...................................1

17.............6295906.................. Live Center Rod................................................. ................................... 1

18.............3520B-118 .............. Quill................................................................... ...................................1

19.............6295909.................. Lead Screw ....................................................... ...................................1

20.............TS-0560071............Hex Nut............................................................. #10-24........................ 1

21.............3520B-121 .............. Set Screw .......................................................... #10-24x3/4” ................1

22.............6295910.................. Lock Handle ...................................................... ...................................1

23.............3728005.................. Quill Lock Sleeve............................................... ...................................1

24.............3520B-124 .............. Tailstock............................................................ ...................................1

25.............3520B-125 .............. Tailstock Handw heel.......................................... ...................................1

26.............3520B-126 .............. Tailstock Handle................................................ ...................................1

27.............6430045.................. Knob.................................................................. ...................................1

28.............3268217.................. Handle............................................................... ...................................1

29.............3092095.................. Clamp................................................................ ...................................1

30.............6095038.................. Bushing............................................................. ...................................1

31.............3708012.................. Tailstock Cl amping Shaft ................................... ...................................1

32.............TS-0640091............Nylon Lock Hex Nut........................................... 3/8”-16........................1

33.............TS-1490021............Hex Cap Screw.................................................. M8x16 ........................1

34.............3520B-134 .............. Co ver Plate........................................................ ...................................1

35.............6295717.................. Lock Knob......................................................... ...................................1

36.............TS-081C022............ Phillips Pan Head Machine Screw...................... #10-24x3/8” ................2

37.............TS-0270011............Socket Set Screw.............................................. 5/16x1/4”....................2

38.............3096003.................. Collar................................................................. ...................................1

39.............6760102.................. Set Screw.......................................................... #10-32x1”...................1

40.............6294774.................. Powermatic Nameplate ..................................... ...................................1

41.............3058001.................. Bolt .................................................................... ...................................1

42.............6294773.................. Warning Label ................................................... ...................................1

43.............3520B-143 .............. Shelf.................................................................. ...................................1

44.............TS-0720091............Lock Was h e r......................................................3/8 ”...........................12

45.............TS-0209061............Socket Head Cap Screw.................................... 3/8x1-1/4”.................12

46.............TS-0570031............Hex Nut............................................................. 3/8”-16........................4

47.............6442000.................. Adjustable Leveler............................................. ...................................4

49.............3520B-149 .............. I.D Label............................................................ ...................................1

50.............3520B-150 .............. Comparator Rear Bracket.................................. ...................................1

51.............3520B-151 .............. Comparator Rear Center.................................... ...................................1

52.............6520009.................. Nylon Lock Hex Nut........................................... 5/8”-11........................1

53.............TS-0680042............Flat Washer.......................................................3/8”...........................10

Optional Accessories: Bed Extensions

Index No. Part No. Description Size Qty

................. 6294727B ............... 18” Bed Extension Assembly (incl udes i tems 1 thru 6)

1............... 3520B-310 .............. Extension Post................................................... ...................................1

2............... 6294763..................Locking Handle.................................................. ...................................1

3............... 3520B-311 .............. 18” Bed Extension ............................................. ...................................1

4............... TS-0680042 ............ Flat Washe r....................................................... 3/8”.............................3

5............... TS-0720091 ............ Lock Washer......................................................3/8”.............................3

6............... TS-0209081 ............ Socket Head Cap Screw.................................... 3/8-16x1-3/4”..............3

................. 6294726B ............... 50” Bed Extension Assembly (incl udes i tems 7 thru 15)

7............... 3520B-101 .............. 50” Bed.............................................................. ...................................1

8............... 3520B-102 .............. Leg.................................................................... ...................................1

9............... TS-0570031 ............ Hex Nut.............................................................3/8-16x1”....................2

10.............6442000.................. Leveler.............................................................. ...................................2

11.............TS-0720091............Lock Was h e r......................................................3/8 ”.............................4

12.............TS-0209061............Socket Head Cap Screw.................................... 3/8”x1-1/4” ..................4

13.............TS-0680042............Flat Washer.......................................................3/8”.............................3

14.............TS-0720091............Lock Was h e r......................................................3/8 ”.............................3

15.............TS-0209081............Socket Head Cap Screw.................................... 3/8-16x1-3/4”..............3

Optional Accessories: Outboard Turning Stand

Index No. Part No. Description Si z e Qty.

................. 6294732..................Heavy Duty Outboard Turning Stand Assembly (item s 1 thr u 7) ...............

1............... 3042503..................Turning Stand Base............................... ...............................................1

2............... 6295897..................Offset To o l Support Pin..........................1.00” diameter.........................1

3............... 6295898..................Offset To o l Support Casting...................1.00” hole................................1

4............... 2695026..................Screw Lock Assembly............................ ...............................................3

5............... 3423055..................Turning Stand Leg ................................. ...............................................1

6............... 6861700..................Lock Washer..........................................5/8”.........................................2

7............... 6769002..................Socket Head Cap Screw........................5/8”-18 x 2”..............................2

Optional Accessories: Adapters, Face Plates, and Tool Supports

Index No. Part No. Description Si z e Qty.

1............... 6294734..................Spind le Adapter.....................................1-1/4”-8 to 1-1/2”-8....................

2............... 6294735..................Spind le Extens ion..................................2”..............................................

3............... 6294745..................Ball Bearing Tailstock Center (not shown) ................................................

4............... 6294736..................3” Face Plate.........................................1-1/4-8......................................

5............... 6294737..................4” Face Plate.........................................1-1/4-8......................................

6............... 6294738..................7” Face Plate.........................................1-1/4-8......................................

7............... 6294733..................Remote ON/OFF Switch........................ .................................................

................. 6294730..................12” Metal Spinning Tool Suppo rt Assembly (includes items 8, 9) ........

8............... ...............................12” Metal Spinning Tool Support............ ...............................................1

9............... 3585011..................Tool Support Pin.................................... 5/8x.495x3.50 .........................2

................. 6294731..................26” Tool Support Assembly (incl udes i tems 10, 11, 12).........................

10............. ............................... 26” Tool Support.................................... ...............................................1

11.............6294795.................. Tool Support Post.................................. ...............................................2

12.............6716219.................. Socket Head Cap Screw........................3/8-16x6-1/4............................2

13.............6294740.................. Bowl Turning Tool Support (R.H.) .......... .................................................

14.............6294751.................. Bowl Turning Tool Support (L.H.)........... .................................................

15.............6294741.................. 16” Tool Support.................................... .................................................

16.............6294739.................. 6” Tool Support...................................... .................................................

................. 6294742..................14” Tool Support.................................... .................................................

Optional Accessories: Dust Port Assembly

Index No. Part No. Description Size Qty

................. 6294796..................Dust Port Assembly (includes index #1 thru 12)

1............... 3520B-401 .............. Lower Dust Hood............................................... ...................................1

2............... 3520B-402 .............. Upper Dust Hood............................................... ...................................1

3............... 3520B-403 .............. Hood Lock K nob (Female) ................................. ...................................1

4............... 3520B-404 .............. Lock Washer, Exte r n a l Too th............................. M7..............................2

5............... 3520B-405 .............. Hood Support Collar .......................................... ...................................1

6............... 3520B-406 .............. Hood Lock K nob ................................................ ...................................3

7............... 3520B-407 .............. Support Rod ...................................................... ...................................1

8............... 3520B-408 .............. Rod Holder........................................................ ...................................1

9............... TS-1482021 ............ Hex Cap Screw..................................................M6x12........................4

10.............TS-2361061............Lock Was h e r......................................................M6..............................4

11.............3520B-411 .............. Support Bracket................................................. ...................................1

12.............3520B-412 .............. Lock Handle ...................................................... ................................... 2

Electrical Connections

Electrical: Remote ON/OFF Switch (Optional Accessory)

NOTE: The Lathe can only operate when both the headstock and remote switches are in the “ON”

position. To mount the remot e switch to y our Lathe, pr oceed as follows.

1. Disconnect all el ec trical power to the Lathe.

2. Remove the two screws from the control panel. Do NOT disconnect control panel from wiring

harness.

3. Run the r emote switch’s wiring harness thr ough the opening in the back of the headstock and out

through the front of the headstock.

4. Connect the remot e switch’s wir ing har ness to the bac k of the Push/P ull switc h (ref er to the el ectrical

schematic on page 40).

5. Reinstall the control panel to the headstock. From the back of the headstock, lightly pull out any

excess wire that may be insi de the headstock .

6. The magnetic back on the r em ote switch will allow the switch to be placed any where on the Lathe.

7. Connect elect rical power to the Lathe and resume operati ons.

NOTES

WMH Tool Gr ou p

2420 Vantage Drive

Elgin, Illinois 60124

Phone: 800-274-6848

www.wmhtoolgroup.com

Powermatic 3520B User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Warranty and Service

Table of Contents

Specifications

Unpacking

Assembly

Comparator Rear Bracket

Tool Caddy

Guard

Bed Extension (Optional Accessory)

Shelf Assemblies (Optional)

Grounding Instructions

Adjustments

Headstock and Tailstock Movement

Cam Tightness

Tool Support

Locking Handles

Live Center and Cone

Indexer

Centers – Installing and Removing

Face Plate – Installing and Removing

Comparator – Installing and Using

Speed Change

Sheave and Belt Alignment

Checking Spindle Play

Sheave/Drive Belt Replacement

Operating Controls

Operation

Turnin g To ols

Spindle Turning

Cutting Techniques

Face Plate and Bowl Turning

Bowl Turning Techniques

Maintenance

Indexer Positions

Troubleshooting

Recommended Lathe Speeds (per diameter of workpiece)

Replacement Parts

Headstock Assembly

Stand and Bed Assembly

Optional Accessories: Bed Extensions

Optional Accessories: Outboard Turning Stand

Optional Accessories: Adapters, Face Plates, and Tool Supports

Optional Accessories: Dust Port Assembly

Electrical Connections