Jet Tools J-7040 User Manual

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Operating Instructions and Parts Manual

10” x 16” Horizontal Band Saw

Models J-7020, J-7040

WALTER MEIER (Manuf acturing) Inc.

427 New Sanford Road LaVergne, Tennessee 37086 Part No. M- 414472

1.0 Warranty and Service

Walter Meier (Manufacturing) Inc., warrants every product it sells. If one of our tools needs service or repair, one of our Authorized Service Centers located throughout the United States can give you quick service. In most cases, any of these Walter Meier Authorized Service Centers can authorize warranty repair, assist you in obtaining parts, or perform routine maintenance and major repair on your JET® tools. For the name of an Authorized Service Center in your area call 1-800-274-6848.

MORE INFORMATION

Walter Meier is consistently adding new products to the line. For complete, up-to-date product information, check with your local Walter Meier distributor, or visit waltermeier.com.

WARRANTY

JET products carry a limited warranty which varies in duratio n based upon the product (MW = Metalworking, WW = Woodworking).

WHAT IS COVERED?

This warranty covers any defects in workmanship or materials subject to the e xceptions 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 JET warranty lasts for the time period specified in the product literature of each product.

WHAT IS NOT COVERED?

Five Year Warranties do not cover woodworking (WW) products used for commercial, industrial or educational purposes. Woodworking products with Five Year Warranties 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, to 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 shipping and handling 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 WARRANTY

WALTER MEIER (MANUFACTURING) INC., 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 ST ATES DO NOT ALLOW LIMITATIONS ON HOW LONG THE IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. WALTER MEIER 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. Walter Meier sells through distributors only. The specifications in Walter Meier catalogs are given as general information and are not binding. Members of Walter Meier reserve the right to effect at any time, without prior notice, those alterations to parts, fittings, and accessory equipment which they may deem necessary for any reason whatsoever. JET® branded products are not sold in Canada by Walter Meier.

2.0 Table of contents

Section Page

1.0 Warranty and Service ............................................................................................................................................ 2

2.0 Table of contents ................................................................................................................................................... 3

3.0 Safety Warnings..................................................................................................................................................... 4

4.0 About this machine and manual ............................................................................................ ............................... 6

5.0 Specifications ......................................................................................................................................................... 6

6.0 Ma chine setup........................................................................................................................................................ 8

6.1 Un crating and spotting ...................................................................................................................................... 8

7.0 Electrical connections............................................................................................................................................ 8

8.0 Operating instructions ........................................................................................................................................... 8

8.1 Controls .............................................................................................................................................................. 8

8.2 Setting blade speed ........................................................................................................................................... 8

8.3 Raising/lowering saw head ............................................................................................................................... 9

8.4 Controlling the cut: Hydraulic feed control ....................................................................................................... 9

8.5 Evaluating cutting efficiency ............................................................................................................................ 10

8.6 Blade selection................................................................................................................................................. 10

8.7 Blade break-in procedures .............................................................................................................................. 10

9.0 Work setup ........................................................................................................................................................... 10

9.1 Securing workpiece for square cuts ............................................................................................................... 10

9.2 Adjusting vise for angle cuts ........................................................................................................................... 10

9.3 Installation and adjustment of work stop........................................................................................................ 11

10.0 Starting the Saw ........................................................................................................ ........................................ 11

10.1 Coolant flow ................................................................................................................................................... 12

10.2 Coolant mixture and quantity ........................................................................................................................ 12

11.0 Adjustments ....................................................................................................................................................... 12

11.1 Blade tracking adjustment............................................................................................................................. 12

11.2 Factory or field procedure ............................................................................................................................. 12

11.3 Blade guide bearing adjustment ................................................................................................................... 13

11.4 Test cutting to verify adjustment accuracy .................................................................................................. 14

11.5 Limit switch adjustment ................................................................................................................................. 14

12.0 Maintenance....................................................................................................................................................... 14

12.1 Cleanin g ......................................................................................................................................................... 14

12.2 Lubrication ...................................................................................................................................................... 15

12.3 Changing blades ............................................................................................................................................ 15

12.4 Changing drive belt........................................................................................................................................ 15

12.5 Replacing drive motor ................................................................................................................................... 16

12.6 Adjusting counterbalance spring .................................................................................................................. 16

12.7 Replacing drive wheel ................................................................................................................................... 16

12.8 Replacing idler wheel or idler bearing .......................................................................................................... 16

12.9 Adjusting blade guides .................................................................................................................................. 16

12.10 Replacing carbide blade guide ................................................................................................................... 17

12.11 Replacing guide bearings ........................................................................................................................... 17

12.12 Replacing blade edge bearings .......................................................................................... ........................ 17

12.13 Replacing wire brush................................................................................................................................... 17

13.0 Tr oublesh ootin g the J-7020/7 040 Band Saws ................................................................................................ 18

14.0 Replacement Parts ............................................................................................................................................ 19

14.1. 1 Base (J-7020/7040) – E xploded Vi ew ...................................................................................................... 20

14.1.2 Base (J-7020/7040) – Parts List............................................................................................................... 21

14.2. 1 Head (J-7020/7040) – E xploded Vi ew ...................................................................................................... 24

14.2. 2 Head (J- 7020/7040) – Parts List .............................................................................................................. 25

15.0 Electrical Connections....................................................................................................................................... 28

15.1 El ectrical Connect ions – si ngle pha se only (model J-7020) ...................................................................... 28

15.2 El ectrical Connect ions – t hree phase only (model J-7040) ........................................................................ 29

3.0 Safety Warnings

General Cautions

- Misuse of this machine can cause serious injury.

- For safety, the machine must be set up, used and serviced properly.

- Read, understand and follow the instructions in the operator’s and parts manual which was shipped with your machine.

When setting up the machine:

- Always avoid using the machine in da mp or poorly lighted work areas.

- Always be sure the machine is securely anchored to the floor or the work bench.

- Always keep the machine guards in place.

- Always put the st art switch in the “OFF” position before plugging in the machine.

When using the machine:

- Never operate the machine with safety guards missing.

- Always wear safety glasses with side shields (See ANSI Z87.1)

- Never wear loose clothing or jewelry.

- Never overreach; you may slip and fall into the machine.

- Never leave the machine running while unattended.

- Always shut the machine off when not in use.

When servicing the machine:

- Always unplug the machine from the electrical power before servicing.

- Always follow the instructions in the operators and parts manual when changing accessory tools or parts.

- Never modify the machine without consulting Walter Meier (Manufacturing) Inc.

You — the stationary power tool user — hold the key to safety.

Read and follow these simple rules for best results and full benefits from your machine. Used properly, JET machinery is among the best in design and safety. However, any machine used improperly can be rendered inefficient and unsafe. It is mandatory that those who use our products be properly trained in how to use them correctly. They should read and understand the Operator’s and Parts Manual as well as all labels affixed to the machine. Failure in following all of these warnings can cause serious injuries.

Gene ra l Mach inery Warn i ngs

1. Always wear protective eye wear when operating machinery. Eye wear shall be impact resistant, protective safety glasses with side shields which comply with ANSI Z87.1 specifications. Use of eye wear which does not comply with ANSI Z87.1 specifications could result in severe injury from the breakage of the eye protection.

2. Wear proper apparel. No loose clothing or jewelry which can get caught in moving parts. Rubber soled, nonslip, footwear is recommended for best footing.

3. Do not overreach. Failure to maintain a proper working position can cause you to fall into the machine or cause your clothing to get caught — pulling you into the machine.

4. Keep guards in place and in proper working order. Do not operate the machine with the guards removed.

5. Avoid dangerous working environments. Do not use stationary machine tools in wet or damp locations. Keep work areas clean and well lit.

6. Special electrical precautions should be taken when working on flammable materials.

7. Avoid accidental starts by being sure that the start switch is in the “OFF” position before plugging in the machine.

8. Never leave the machine running while unattended. The machine shall be shut off whenever it is not being used.

9. Disconnect the electrical power before servicing, whenever changing accessories or when general maintenance is done on the machine.

10. Maintain all machine tools with care. Follow all maintenance instructions for lubricating and the changing of accessories. No attempt shall be made to modify or have makeshift repairs done to the machine. This not only voids the warranty but also renders the machine unsafe.

11. If there is any risk of tipping or sliding, the machinery must be anchored to the floor.

12. Secure your work. Use clamps or a vise to hold your work, when practical. It is safer than using your hands and it frees both hands to operate the machine.

13. Never brush chips away while the machine is in operation.

14. Keep work area clean. Cluttered areas invite accidents.

15. Remove adjusting keys and wrenches before turning the machine on.

16. Use the right tool. Don’t force a tool or attachment to do a job for which it was not designed.

17. Use only recommended accessories and follow manufacturer’s instructions pertaining to them.

18. Keep hands in sight and clear of all moving parts

and cutting surfaces.

19. All visitors should be kept at a safe distance from the work area. Make your workshop co mpletely safe by using padlocks, master switches, or by removing starter keys.

20. Know the tool you are using; its application, limitations, and potential hazards.

General Electrical Cautions

This machine should be grounded in accordance with the National Electrical Code and local codes and ordinances. The work should be done by a qualified electrician. The machine should be grounded to protect the user from electrical shock.

Wi re Sizes

CAUTION: For circuits that are a great distance fro m

the electrical service box, the wire size must be increased in order to deliver ample voltage to the motor. To minimize power losses and to prevent motor overheating and burnout, the use of wire sizes for branch circuits or electrical extension cords according to the following table is recommended:

Conductor

length

240 volt lines 120 volt lines

0-50 feet No. 14 No. 14

50-100 feet No. 14 No. 12

Over 100 feet No. 12 No. 8

WG (American Wire Gauge) number

Safet y Inst ruc tions on Sawing Systems

1. Always wear leather gloves when handling saw blade. The operator shall not wear gloves when operating the machi ne.

2. All doors shall be closed, all panels replaced, and other safety guards in place prior to the machine being started or opera ted.

3. Be sure that the blade is not in contact with the workpiece when the motor is started. The

motor shall be started and you should allow the saw to achieve full speed before bringing the saw bl ade into contact with the workpiece.

4. Keep hands away from the blade area.

5. Remove any cut off piece carefully while keeping y our hands free of the blade a rea.

6. Saw must be stopped and electrical supply must be cut off before any blade replacement or adjustment of blade support mechanism is done, or before any attempt is made to change the drive belt s or before a ny per iodic ser vice or maintenance i s perfor m ed on the saw.

7. Remove all loose items and unnecessary workpieces from the area before starting machine.

8. Bring adjustable saw guides and guards as close as pos sible t o the workpiece.

9. Always wear protective eye wear when operating, servicing, or adjusting machinery. Eyewear shall be impact resistant, protective safety glasses with side shields complying with ANSI Z87.1 specifications. Use of eye wear which does not comply with ANSI Z87.1 specifications could result in severe injury from br eakage of eye prot ection.

10. 10. Nonslip footwear and safety shoes are recommended.

11. Wear ear protectors (plugs or muffs) during extended per iods of operation.

12. The workpiece, or part being sawed, must be securely clamped before the saw blade enters the workpiece.

13. Remove cut off pieces carefully, keeping hands away from saw blade.

14. Saw must be stopped and electrical supply disconnected before reaching into cutting area.

15. Avoid contact with coolant, especially guarding your eyes.

Familiarize yourself with the following safety notices used in this manual:

This means that if precautions are not heeded, it may result in minor injury and/or possible

machine da ma ge.

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

death.

4.0 About this machine and manual

The JET Models J-7020 and J-7040 Horizontal Cut-Off Band Saws are ruggedly built, precision-oriented machines designed for either wet or dry applications. The 2-horsepower motor along with the worm gear reduction drive train in an oil bath, transmits smoot h and positive power to th e blade. This drive sy stem coupled with the recirculating coolant system keeps the blade running cool and true, which results in longer blade life. The blade guide system has adjustable six-point contact using a combination of bearing and carbide blocks. The vise is a rapid acting, three j aw design.

This manual is provided by Walter Meier (Manufacturing) Inc. covering the safe operation and maintenance procedures fo r the J- 70 20 and J- 7 04 0 Ho r izontal B a nd Saws . T hi s m an ual c o ntains instr uc t ions o n i ns t allat ion, safety precautions, general operating procedures, maintenance instructions and parts breakdown. Your machine has been designed and constructed to provide years of trouble-free operation if used in accordance with the instructions as set forth in this document.

If there are questions or comments, please contact your local supplier or Walter Meier. Walter Meier can also be reached at ou r web sit e: www .walt ermeier.com.

Retain this manual for fut ure reference. If the machine transfer s ownersh ip, th e m anual sh ould accompany it.

Read and understand the entire contents of this manual before attempting assembly

or operation! Failure to comply may cause serious injury!

5.0 Specifications

Model number ......................................................... J-7020 ..................................... J-7040 ............................... J-7040-4

Stock number......................................................... 414472 .................................... 414478 ..................................414499

Motor and electricals:

Main motor type...................................................... ......totally enclosed fan cooled, induction ....................................

Horsepower ...................................... 1-1/2 HP (1.1kW) ........................... 2HP (1.5kW) ......................... 2HP (1.5kW)

Phase .................................................................. single .............................................. 3 ............................................3

Voltage .......................................................... 115/230V ................................ 230/460V .............................. 230/460V

(prewired 230V) (prewired 230V) (prewired 460V)

Cycle .................................................................... 60Hz ....................................... 60Hz ..................................... 60Hz

Listed FLA (full load amps)............................. 22A/11A ........................................... 6A ......................................... 3A

Start capacitor .................................. 300MFD 250VAC ............................................. -- ........................................... --

Run capacitor .........................................40μF 250VAC ............................................. -- ........................................... --

Starting amps ............................................... 80A / 40A ......................................... 26A ....................................... 13A

Running amps (no load) .............................. 15A / 7.6A ........................................... 8A ......................................... 4A

Power cord length .................................................. 6 ft. .......................................... 6 ft. ........................................6 ft.

Power plug installed ................................................. no ............................................ no ..........................................no

Power transfer ....................... belt and stepless pulleys .........belt and stepless pulleys ...... belt and stepless pulleys

Motor speed ................................................ 1720 RPM ............................... 1720 RPM .............................1720 RPM

Recommended circuit size

Sound emission ................................................... 80 dB ...................................... 80 dB .................................... 80 dB

Coolant pump:

Horsepower ...........................................1/8HP (0.1kW) ........................ 1/8HP (0.1kW) ...................... 1/8HP (0.1kW)

Phase .................................................................. single .............................................. 3 ............................................3

Voltage .......................................................... 115/230V ................................ 220/440V .............................. 220/440V

Listed FLA (full load amps)............................ 0.5/0.25A .................................. 0.2/0.1A ................................ 0.2/0.1A

Speed ................................................. 2850/3400 RPM ...................... 2850/3400 RPM ....................2850/3400 RPM

Cycle .................................................................... 60Hz ....................................... 60Hz ..................................... 60Hz

Flow rate.....................................................1 gal. p/min ............................. 1 gal. p/min ........................... 1 gal. p/min

subject to local/national electrical codes

............................ 30A/15A ......................................... 15A ....................................... 10A

Speeds and capacities:

Blade speed ............................... variable 100-350 fpm .............. variable 100-350 fpm ............ variable 100-350 fpm

Round capacity at 90-degrees .................10” (255mm) ........................... 10” (255mm) ......................... 10” (255mm)

Round capacity at 45-degrees .................10” (255mm) ........................... 10” (255mm) ......................... 10” (255mm)

Rectangular capacity at 90-degrees...... 7”x16”/10”x10” ........................ 7”x16”/10”x10” ...................... 7”x16”/10”x10”

Rectangular capacity at 45-degrees............. 6-1/2”x11” ............................... 6-1/2”x11” ............................. 6-1/2”x 11”

Coolant reservoir capacity ................................... 8 gal. ....................................... 8 gal. ..................................... 8 gal.

Dimensions:

Blade size ............................................... 1x0.035x130” .......................... 1x0.035x130” ........................ 1x0.035x130”

Blade wheel diameter ...............................14” (360mm) ........................... 14” (360mm) ......................... 14” (360mm)

Bed height from floor ......................... 23-1/2” (597mm) ..................... 23-1/2” (597mm) ................... 23-1/2” (597mm)

Floor space required ........................... 75-1/2”x33”x41” ...................... 75-1/2”x 33”x41” .................... 75-1/2”x33”x41”

(1918x838x1042mm) (1918x838x1042mm) (1918x838x1042mm)

Bed working surface ............................. 17-1/2”Wx24”L ........................ 17-1/2”Wx24”L ...................... 17-1/2”Wx24”L

(445x610mm) (445x610mm) (445x610mm)

Overall size........................................ 79”Lx31”Wx41”H .....................79”Lx31”Wx41”H .................. 79”Lx31”Wx41”H

(2007x788x1042mm) (2007x788x1042mm) (2007x788x1042mm)

Shipping crate ................................... 76”Lx30”Wx46”H .....................76”Lx 30”Wx46”H .................. 76”Lx30”Wx46”H

(1931x762x1170mm) (1931x762x1170mm) (1931x762x1170mm) Materials:

Bed and motor support ....................................cast iron .................................. cast iron ................................ cast iron

Blade wheels ...................................................cast iron ................................. cast iron ................................ cast iron

Bow frame .............................................................steel ........................................ steel ...................................... steel

Stand .....................................................................steel ........................................ steel ...................................... steel

Blade guides.......................carbide blocks/ball bearing ..... carbide blocks/ball bearing ... carbide blocks/ball bearing

Weights:

Net weight .......................................... 927 lb (420.5kg) ...................... 927 lb (420.5kg) ....................927 lb (420.5kg)

Shipping weight ..................................... 973 lb (441kg) ......................... 973 lb (441kg) .......................973 lb (441kg)

The specifications in this manual were current at time of publication, but because of our policy of continuous improvement, Walter M eier (Manufacturing) Inc., reserves the ri ght to change speci fications at any time and wi thout prior notice, without incurring obligations.

6.0 Machine setup

The saw delivered to you has been adjusted at the factory. A number of test pieces have been cut using the saw to verify the accuracy of cutting. Therefore, the only setup operations required before releasing the saw for service are spotting the saw and establishing the electrical connections to the motor.

6.1 Un crat i ng and spotti ng

Spot the saw where it makes the most sense for the operations you will probably be doing. If you are going to be doing cut-off work on very long pieces of stock, allow plenty of room for the stock, and the infeed and outfeed supports. Remove the saw f rom the ship ping skid and dis card any holddown devices that were used to secure the saw to the skid.

7.0 Electr ic al co n nect i on s

NOTE: Local codes take precedence over recommendations.

8.0 Operating instructions

8.1 Controls

The operating controls for the saw are provided in a control panel on the left side of the machine. The control panel is mounted on a pivoting tube. The pivoting tube allows the operator to position the control panel in a convenient location.

JET recommends that any wiring involving hard wiring of the saw to a branch, or any change of voltage supplied to the motor be performed by a licensed electrician.

Observe the following when connecting to the power source (wiring diagrams are shown in secti on 15.0):

1. Make sure the saw is disconnected from the

power source, or that the fuses have been removed or breakers tripped in the circuit in which the saw will be connected. Place a warning placard on the f use or circuit breaker to pr event a ccidental electrical shock .

2. If you are instal ling th e m otor power cor d int o a

receptacle, make sure to use the appropriate plug.

3. If you are using hard-wired connections to a

junction box, connect the wires in the box, and close th e box.

4. In stall the fuses or r eset t he break e r.

5. The saw is now ready for service. It is recomm ended that the single phase band saw

(model J-7020), when operated on 115 v o lt power, be connected to a dedicated 30 amp circuit with a 30 amp circuit breaker or time-delay fuse marked “D”. When operated on 230 volt power, use a dedicated 15 amp circuit with a 15 amp circuit breaker or ti m e-delay fuse marked “D”.

It is recommended that the three phase band saw (model J-70 40) on 230 volt power b e connect ed to a dedicated 15 amp circuit with a 20 amp circuit breaker or time-delay fuse marked “D”; and for 460 volt power, a dedicated 10 amp circuit with a 20 amp circuit breaker or time- delay fuse mark ed “D”.

Figur e 1: Control panel

1. A power-on light is provided on the left side of the control panel. The power-on light indicates when power is connected to the machine.

2. An emergency stop button is provided on the control panel. The emergency stop button provides a means to rapidly cut off electrical power.

3. The saw motor pushbutton switch starts the saw motor and the E-stop button stops the saw motor.

4. A green pushbutton switch is provided to the right of the emergency stop pushbutton. The pushbutton opens an electro-magnetic valve in the hydraulic cylinder circuit. Opening the valves a llows t he saw head to move downward and put the saw blade in contact with the workpiece.

5. A red release button on the electro-magnetic valve provides a means to lower the saw head when power to the machine has been disconnected (see Figure 4) .

6. The rate at which the saw head moves downward is controlled by a hydraulic feed rate control located on the top, rear of the saw head (see Figure 3).

7. A coolant pump switch is provided on the electrical equipment box on the back of the machine (see figur e 2).

8.2 Set t ing blade speed

1. The blade speed is controlled by an adjustment mechanism on the right end of the saw. Speed increases when the adjustment

knob is turned counterclockwise. Speed decreases when the knob i s turned clockwise.

2. A placard on the drive belt guard provides recommended speeds for v arious ma teria ls.

3. A speed indicator is provided on the barrel of the adjustment mechanism. The indicator provides speed indications in feet per minute and meters per minute. (The meters per minute values are shown in parenthesis on the indicator.)

4. The feed rates on the placard are expressed in me ters pe r minute . The f eed rate grad uatio ns available on the indicator may not match the recommended feed rate. An approximate speed may therefore be required. For example, to set a speed rate of 25 meters per minute, the indicator would be set about midway between 21 meters-per-minute and the 30 meter s-per- m inute gr aduation s.

To change speed, the saw

motor must be ope rating.

5. Turn the speed adjustment knob to the desired rate setting as determined by the material being cut.

8.4 Controlling the cut: Hydraulic

feed contro l

The weight of the saw arm provides all the force needed to move the saw blade through the workpiece. In fact, if the full weight of the arm is allow ed to make the cut, rapid bl ade wear and poor cutting accuracy will result. A hydraulic feed control is provided that gives the operator a means to control the speed and efficiency of cut ting.

The hydraulic cylinder is attached between the saw base and the saw head. The hydraulic cylinder resi sts movement of t he saw head in th e downward direction. However, the hydraulic cyl inder offers no resi stance when the saw head is ra ised upward.

The amount of downward force can be controlled by using the feed rate control valve. When the valve is opened slightly, the saw head will move downward. The further the valve is opened, the fast er the saw head will mov e downward.

The feed control is adjusted by the operator until the saw is operating efficiently. This is usually determined by observing the chip formation. (See section 8.5, Evaluating cutting efficiency, fo r more information.)

Figur e 2: Coolant pump swit ch

8.3 Rai si ng/lo wering saw head

1. Lift the saw head using the handle on the far left side of the saw head.

2. To lower the saw head, press the green pushbutton on the right side of the control panel.

3. To adjust the feed rate, adjust the feed rate control valve knob on the top of the saw head (see Fi gure 3) .

4. To lower the saw head with power off, pull and turn the red knob (manual override) on the elect ro-magnetic valve ( see Figur e 4).

Figur e 4: Lowering head with p ower off

Figur e 3: Controls

8.5 Evaluating cut ting effici ency

Is the blade cutting efficiently? The best way to determine this is to observe the chips formed by the cut ting blade.

If the chip formation is powdery, then the feed rate is much too light, or the bla de is dull.

If the chips formed are curled, but colored — that is, eith er blue or straw-colored fr om heat gen erated durin g the cut — then th e feed rat e is too h igh.

If the c hips are sli ghtl y cu rle d and ar e not c o lor ed by heat — the blade is sufficiently sharp and is cutting at its most efficient rat e.

8.6 Blade selecti on

The cut-off saw is provided with a saw blade that is adequate for a variety of cut-off jobs on a variety of common materials. A 4/6 vari tooth bi-metal blade (5674011) and a 6/10 vari tooth bi-metal blade (5674021) are ava il able from JET.

See sect. 8.2, Setting blade speed, for the recommended speeds for various materials. These selections , whi le appropriate for many shop cutting needs, do not encompass the wide variety of blades of special configuration (tooth pitch and set) and special alloys for cutting unusual or exotic materials.

A c oar se b lad e co uld be us ed fo r a s ol id st eel b ar but a finer tooth blade would be used on a thin-wall tube. In general, the blade choice is determined by the thickness of the material; the thinner the materi al, the finer the tooth pitch.

A minimum of three teeth should be on the wor k piece at all times for proper cutting. The blade and workpiece ca n be damaged if t he teet h are so far apart that they straddle the wor kpiece.

For very high production on cutting of special materials, or to cut hard-to-cut materials such as stainless steel, tool steel, or titanium, you can ask your industrial distributor for more specific blade recommendat ions. Also, the supplier w ho provides the workpiece material should be prepared to provide you with very specific instructions regarding the best blade (and coolant or cutting fluid, if needed) for the material and shape supplied.

1. Clamp a round section workpiece in the vise. The workpiece should be 2 inches or larger in diameter.

2. Set the saw on low speed. Start the cut with a very light feed rate.

3. When the saw has completed 1/3 of the cut, increase the feed rate slightly and allow the saw to complete the cut.

4. K eep the sam e hydr aulic cylind er s etting and begin a second cut on the same or similar workpiece.

5. When the blade has completed about 1/3 of the cut, increase the feed rate. Watch the chip formation until cutting is at its most efficient rate and allow the saw to complete the cut (see sect. 8.5, Evaluating blade efficiency). The bl ade is no w cons ide red read y fo r regul ar service.

9.0 Work setup

9.1 Securing wo rkpiece fo r square

cuts

1. Raise the saw head (refer to Figure 5).

2. Slide the left vise jaw f ar enough to the left to allow the workpi ece to be pla ced in t he vise.

3. Place the workpiece on the work table. If the workpiece is long, provide support at the other end. It may also be necessary to provide additional downward clamping to hold the workpiece securely on the work table.

4. Turn clamping hand wheel clockwise to clamp the workpiece in position against the fixed (right) vise jaw.

5. After completing the cut, turn the clamping hand wheel counterclockwise and slide the left jaw away from th e workpiece.

8.7 Bl ade break-in procedures

New blades are very sharp a nd, therefore, have a tooth geometry which is easily damaged if a careful break-in procedure is not followed. Consult the blade manufacturer’s literature for break-in of spec ific blades o n specific materials. However, the following procedure will be adequate for br eak- in of JET-supplied blades on lower alloy ferrous materials.

Figure 5: Securing workpiece

9.2 Ad justing vise for an gl e cuts

1. Referring to Figure 6, loosen the angle locking screw and the pi vot screw on the le ft vise jaw.

2. Turn the locking handle on the round, anglesetting block counterclockwise to unlock the

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