Wilton 8014FW, 8020FW Operating Instructions And Parts Manual

Operating Instructions and Parts Manual
14- & 20-inch Metalworking Band Saws
Models 8014FW and 8020FW
Model 8014FW Model 8020FW
WMH TOOL GROUP
2420 Vantage Drive Elgin, Illinois 60123 Part No. M-8014FW Ph.: 800-274-6848 Revision A 6/05 www.wmhtoolgroup.com Copyright © WMH Tool Group
This manual has been prepared for the owner and operators of a Wilton 8014FW or 8020FW Band Saw. Its purpose, aside from machine operation, is to promote safety using accepted operating and maintenance procedures. To obtain maximum life and efficiency from your band saw and to aid in using it safely, please read this manual thoroughly and follow the instructions carefully.
Warranty and Service
WMH Tool Group warrants every product it sells. If one of our tools needs service or repair, one of our Authorized Repair Stations located throughout the United States can provide quick service or information.
In most cases, a WMH Tool Group Repair Station can assist in authorizing repair work, obtaining parts, or perform routine or major maintenance repair on your Wilton product.
For the name of an Authorized Repair Station in your area, please call 1-800-274-6848, or visit our web site at www.wmhtoolgroup.com
More Information
Remember, WMH Tool Group is consistently adding new products to the line. For complete, up-to-date product information, check with your local WMH Tool Group distributor, or visit our web site at www.wmhtoolgroup.com
WMH Tool Group Warranty
WMH Tool Group makes every effort to assure that its products meet high quality and durability standards and warrants to the original retail consumer/purchaser of our products that each product be free from defects in materials and workmanship as follows: 1 YEAR LIMITED WARRANTY ON ALL PRODUCTS UNLESS SPECIFIED OTHERWISE. This Warranty does not apply to defects due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear, repair or alterations outside our facilities, or to a lack of maintenance.
WMH TOOL GROUP LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD SPECIFIED ABOVE, BEGINNING FROM THE DATE THE PRODUCT WAS PURCHASED AT RETAIL. 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. IN NO EVENT SHALL WMH TOOL GROUP 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.
To take advantage of this warranty, the product or part must be returned for examination, postage prepaid, to an Authorized Repair Station designated by our office. Proof of purchase date and an explanation of the complaint must accompany the merchandise. If our inspection discloses a defect, we will either repair or replace the product at our discretion, or refund the purchase price if we cannot readily and quickly provide a repair or replacement. We will return the repaired product or replacement at WMH Tool Group’s expense, but if it is determined there is no defect, or that the defect resulted from causes not within the scope of WMH Tool Group’s warranty, then the user must bear the cost of storing and returning the product. This warranty gives you specific legal rights; you may also have other rights, which vary from state to state.
WMH Tool Group sells through distributors only. Members of the WMH Tool Group reserve the right to effect at any time, without prior notice, alterations to parts, fittings and accessory equipment, which they may deem necessary for any reason whatsoever.
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Table of Contents
Warranty and Service ..............................................................................................................................2
Table of Contents ....................................................................................................................................3
Warning...................................................................................................................................................4
Introduction.............................................................................................................................................. 6
Specifications ..........................................................................................................................................6
Features and Terminology.......................................................................................................................7
Unpacking ...............................................................................................................................................8
Contents of the Shipping Container ......................................................................................................8
Installation and Assembly ........................................................................................................................9
Fence...................................................................................................................................................9
Shear...................................................................................................................................................9
Grounding Instructions.............................................................................................................................9
Test Run ............................................................................................................................................ 10
Extension cords..................................................................................................................................10
Adjustments........................................................................................................................................... 11
Blade Removal and Installation .......................................................................................................... 11
Guide Post .........................................................................................................................................11
Blade Tension....................................................................................................................................11
Blade Tracking...................................................................................................................................12
Blade Guides ..................................................................................................................................... 12
Squaring Work Table with Blade.........................................................................................................13
Replacing Drive Belts......................................................................................................................... 14
Work Lamp Bulb.................................................................................................................................14
Band Saw Operation..............................................................................................................................14
Blade Break-In Procedure ..................................................................................................................14
Setting Blade Speed........................................................................................................................... 15
Evaluating Cutting Efficiency ..............................................................................................................15
Welder Operation...................................................................................................................................16
Shearing ............................................................................................................................................ 16
Removing Teeth................................................................................................................................. 16
Welding..............................................................................................................................................16
Annealing...........................................................................................................................................17
Blade Selection......................................................................................................................................19
Width ................................................................................................................................................. 19
Gage..................................................................................................................................................20
Pitch...................................................................................................................................................20
Shape ................................................................................................................................................20
Set .....................................................................................................................................................21
Material..............................................................................................................................................21
Blade Breakage..................................................................................................................................21
Speed and Pitch Chart...........................................................................................................................23
Typical Band Saw Operations................................................................................................................ 24
Troubleshooting – Mechanical and Electrical Problems..........................................................................26
Replacement Parts ................................................................................................................................29
Parts List: Band Saw Assembly (8014FW only) .................................................................................. 30
Band Saw Assembly (8014FW only)................................................................................................... 35
Parts List: Welder, Shear and Work Lamp Assemblies (8014FW only)................................................ 36
Welder, Shear and Work Lamp Assemblies (8014FW only) ................................................................39
Parts List: Band Saw Assembly (8020FW only) .................................................................................. 40
Band Saw Assembly (8020FW only)................................................................................................... 47
Band Saw Assembly (8020FW only)................................................................................................... 48
Parts List: Welder, Shear and Work Lamp Assemblies (8020FW only)................................................ 49
Welder, Shear and Work Lamp Assemblies (8020FW only) ................................................................52
Electrical Connections – Model 8014FW only.........................................................................................53
Electrical Connections – Model 8020FW only.........................................................................................54
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Warning
1. Read and understand the entire owners manual before attempting assembly or operation.
2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with
all of these warnings may cause serious injury.
3. Replace the warning labels if they become obscured or removed.
4. This band saw is designed and intended for use by properly trained and experienced personnel only.
If you are not familiar with the proper and safe operation of a band saw, do not use until proper training and knowledge have been obtained.
5. Do not use this band saw for other than its intended use. If used for other purposes, WMH Tool
Group disclaims any real or implied warranty and holds itself harmless from any injury that may result from that use.
6. Always wear approved safety glasses/face shields while using this band saw. Everyday eyeglasses
only have impact resistant lenses; they are not safety glasses.
7. Before operating this band saw, remove tie, rings, watches and other jewelry, and roll sleeves up past
the elbows. Remove all loose clothing and confine long hair. Non-slip footwear or anti-skid floor strips are recommended. Do not wear gloves.
8. Wear ear protectors (plugs or muffs) during extended periods of operation.
9. Some dust created by power sanding, sawing, grinding, drilling and other construction activities
contain chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:
Lead from lead based paint.
Crystalline silica from bricks, cement and other masonry products.
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, alcohol or any medication.
11. Make certain the switch is in the OFF position before connecting the machine to the power supply.
12. Make certain the machine is properly grounded.
13. Make all machine adjustments or maintenance with the machine unplugged from the power source.
14. 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.
15. Keep safety guards in place at all times when the machine is in use. If removed for maintenance
purposes, use extreme caution and replace the guards immediately.
16. 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 parts, binding of moving parts, breakage of parts, mounting and any other conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced.
17. Provide for adequate space surrounding work area and non-glare, overhead lighting.
18. Keep the floor around the machine clean and free of scrap material, oil and grease.
19. Keep visitors a safe distance from the work area. Keep children away.
20. Make your workshop child proof with padlocks, master switches or by removing starter keys.
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21. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are
careless acts that can result in serious injury.
22. Maintain a balanced stance at all times so that you do not fall or lean against the blade or other
moving parts. Do not overreach or use excessive force to perform any machine operation.
23. Use the right tool at the correct speed and feed rate. Do not force a tool or attachment to do a job for
which it was not designed. The right tool will do the job better and safer.
24. Use recommended accessories; improper accessories may be hazardous.
25. Maintain tools with care. Keep blades sharp and clean for the best and safest performance. Follow
instructions for lubricating and changing accessories.
26. Turn off the machine before cleaning. Use a brush or compressed air to remove chips or debris — do
not use your hands.
27. Do not stand on the machine. Serious injury could occur if the machine tips over.
28. Never leave the machine running unattended. Turn the power off and do not leave the machine until
the blade comes to a complete stop.
29. Remove loose items and unnecessary work pieces from the area before starting the machine.
30. Never place hands directly in line with the saw blade.
31. Always use push sticks when cutting small material.
32. Raise or lower the blade guide only when the machine has been turned off and the blade has stopped
moving.
33. Always wear leather gloves when handling saw blades. The operator should not wear gloves when
operating the machine.
34. Do not allow the saw blade to rest against the workpiece when the saw is not running.
35. The saw must be stopped and the electrical supply must be cut off before any blade replacement,
drive belt replacement, or any periodic service or maintenance is performed on the machine.
36. Remove cut off pieces carefully, keeping hands away from the blade. The saw must be stopped and
the electrical supply cut off or machine unplugged before reaching into the cutting area.
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 damage.
This means that if precautions are not heeded, it may result in serious injury or possibly
even death.
- - SAVE THESE INSTRUCTIONS - -
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Introduction
This manual is provided by WMH Tool Group covering the safe operation and maintenance procedures for a Wilton Model 8014FW or 8020FW Band Saw. This manual contains instructions on installation, safety precautions, general operating procedures, maintenance instructions and parts breakdown. This machine has been designed and constructed to provide years of trouble free operation if used in accordance with instructions set forth in this manual. If there are any questions or comments, please contact either your local supplier or WMH Tool Group. WMH Tool Group can also be reached at our web site: www.wmhtoolgroup.com.
Specifications
Model Number............................................................ 8014FW....................................................8020FW
Stock Number (220V) .............................................. 8014FW-2.................................................8020FW-2
Stock Number (440V) .............................................. 8014FW-4.................................................8020FW-4
Blade Speeds (SFPM) .................................................. 82-330...................... Low 65-555, High 390-3280
Height Capacity, Maximum (in.) ............................................. 8............................................................. 12
Throat Capacity, Maximum (in.) ........................................... 14............................................................. 20
Table Size (L x W)(in.) ..................................................20 x 20............................................... 24 x 22-1/2
Table Height at 90° (in.)....................................................... 39....................................................... 39-1/2
Table Tilt (deg.) ..............................8 fwd/back, 12 left, 15 right....................... 8 fwd/back, 15 left, 15 right
Welder (KVA)...................................................................... 1.5............................................................ 4.2
Blade Length, approx. (in.)................................................. 114.................................... 150-1/2 to 156-1/2
Blade Width (in.)...........................................1/8 min., 1/2 max...................................... 1/8 min., 1/2 max.
Motor........................................................................ 1HP, 3Ph..................................................2HP, 3Ph
Floor Space Required (in.)............................................34 x 24 ..................................................... 42 x 29
Net Weight (lbs.)................................................................ 580 ......................................................... 1210
The above specifications were current at the time this manual was published, but because of our policy of continuous improvement, WMH Tool Group reserves the right to change specifications at any time and without prior notice, without incurring obligations.
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Features and Terminology
1 – Variable Speed Handwheel 2 – Fence 3 – Work Lamp 4 – Chip Blower Hose 5 – Guide Post Lock Knob 6 – Tension Handwheel 7 – Speed and Pitch Selector 8 – Upper Door 9 – Digital Readout 10 – On/Off Buttons 11 – Shear
12 – Lower Door 13 – Pressure Selector Switch 14 – Anneal Button 15 – Weld Button 16 – Welder Clamp 17 – Clamp Handle 18 – Grinder Toggle Switch 19 – Grinder 20 – Gear Selector Lever (8020FW only) 21 – Post Elevating Handwheel (8020FW only)
7
Unpacking
Open shipping container and check for shipping damage. Smaller parts are found in a separate box at the foot of the band saw. Report any damage immediately to your distributor and shipping agent. Do not discard any shipping material until the Band Saw is set up and running properly.
Compare the contents of your container with the following parts list to make sure all parts are intact. Missing parts, if any, should be reported to your distributor. Read the instruction manual thoroughly for assembly, maintenance and safety instructions.
Contents of the Shipping Container
1 Band Saw 1 Fence 1 Knob 1 Shear 1 Eye Bolt 1 Set of Hex Wrenches (3, 6, 8 and 10 mm) 1 Set of Keys (Model 8020FW only)
1 Owner's Manual 1 Warranty Card
Read and understand the entire contents of this manual before attempting set-up
or operation! Failure to comply may cause serious injury.
8
Installation and Assembly
Tools required for assembly:
Forklift or hoist with strap or chain Set of hex wrenches (provided)
Remove all crating and plastic from around the band saw. Remove any lag screws or holding straps which secure the saw to the wood pallet.
Remove the eye bolt from the tool box, and screw it into the hole at the top of the machine. Lift the band saw from the pallet using a strap or chain connected to the eye bolt.
Move the band saw to its permanent location which should be dry, well ventilated, with sufficient lighting. Leave enough space on all sides to handle long stock or perform routine maintenance on the machine. Make sure the floor is level and able to support the weight of the machine.
The Band Saw may be further stabilized by securing it to the floor using lag screws (not provided) through the tabs at the bottom.
Areas of the Band Saw have been given a protective coating at the factory. This should be removed with a soft cloth moistened with kerosene or a mild cleaner/degreaser. Do not use gasoline, paint thinner, or lacquer thinner as these will damage painted surfaces. Do not use an abrasive pad.
Fence
Place the fence (Figure 1) onto the groove in the table as shown, and screw in the knob to tighten the fence in position.
Shear
Remove the two socket head cap screws at the back of the column, and use them to mount the shear, as shown in Figure 2.
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 Band Saw must be grounded. In the event of a malfunction or breakdown, grounding provides a path of least resistance for electric current to reduce the risk of electric shock.
Figure 1
Figure 2
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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 repair or replacement of the electric cord or plug is necessary, do not connect the equipment-grounding conductor 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.
Make sure the voltage of your power supply matches the specifications on the motor plate of the Band Saw. This Band Saw should be connected to a dedicated circuit. You may either install a plug or “hard-wire” the Band Saw directly to a control panel. If you are connecting a plug, use a proper UL-listed plug suitable for the voltage of the motor.
If the Band Saw is to be hard-wired to a panel, make sure a disconnect is available for the operator. During hard-wiring of the Band Saw, make sure the fuses have been removed or the breakers have been tripped in the circuit to which the Band Saw will be connected. Place a warning placard on the fuse holder or circuit breaker to prevent it from being turned on while the machine is being wired.
Test Run
After wiring the Band Saw, you should check that the wires have been connected properly. Connect machine to the power source and turn it on for an instant to watch the direction of blade movement.
If the blade runs upward instead of downward, disconnect machine from power, and switch any two of the three leads in the motor junction box (see “Electrical Connections”, pages 53 and
54).
Extension cords
The use of an extension cord is not recommended for this Band Saw. But if one is necessary, make sure the cord rating is suitable for the amperage listed on the machine’s motor plate. An undersize cord will cause a drop in line voltage resulting in loss of power and overheating.
Recommended Gauges (AWG) of Extension Cords
Extension Cord Length *
25
50
75
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
21 to 30 10 NR NR NR NR NR
feet
feet
feet
feet
feet
200 feet
Use the chart in Figure 3 as a general guide in choosing the correct size cord. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord.
*based on limiting the line voltage drop to 5V at 150% of the rated amperes.
NR: Not Recommended.
Figure 3
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Adjustments
[NOTE: Procedures for the model 8014FW and the model 8020FW are identical except where noted.]
Blade Removal and Installation
Wear leather gloves when removing or installing band saw blades. New blades usually come in a coiled position; to prevent injury, hold the blade with one hand while carefully uncoiling it with the other.
1. Disconnect machine from power source.
2. Open upper and lower doors.
3. Loosen tension on the blade by turning the
tension handwheel (Figures 6 and 7) to the left.
4. Remove the worn blade and install the new
blade, making sure the teeth face downward where they pass through the slot in the table.
5. Use the tension handwheel to tighten the
tension on the blade.
Figure 6
(Model 8014FW only)
6. Proceed with “Blade Tension” and “Blade
Tracking” before operating the band saw.
Guide Post
For effective cutting and for safety’s sake, there should be a minimum amount of space between the top of the workpiece and the bottom of the blade guides. Loosen the guide post lock knob (see Figure 6) and use the handle (handwheel on 8020FW) to move the guide post, until the guides clear the workpiece by about 1/8”. Retighten the lock knob.
Blade Tension
1. Raise the guide post to its highest position.
2. Apply finger pressure to the blade. Travel
from vertical should be approximately 3/8” each way.
3. Rotate blade tension handwheel (Figures 6
and 7) to the right to increase tension on the blade, or to the left to decrease tension on the blade.
[NOTE: The Model 8020FW has a tension gauge, shown in Figure 7. Initially, set the tension to correspond to the width of the blade as indicated on the gauge. You may later find it necessary to “fine-tune” this setting depending upon the material being worked.]
Figure 7
(Model 8020FW only)
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Keep in mind that too much or too little blade tension can cause blade breakage and/or poor cutting performance.
If the band saw is to be idle for a period of time, release tension on the blade – this will prolong blade life.
Blade Tracking
Blade tracking has been tested at the factory but should be checked as the machine receives use, and after each blade change.
1. Disconnect machine from power source.
2. Move the upper and lower blade guides
away from the blade (see “Blade Guides”).
3. Open the top blade wheel door.
4. Rotate upper blade wheel by hand,
observing the position of the blade as it rides upon the wheel. The blade should run next to, but not against, the flange at the rear of the wheel. Constant contact with the flange will eventually damage the flange.
5. If the blade tracks improperly, use the
screws at the back of the saw (Figure 6) to adjust the model 8014FW. Loosen the socket head cap screws as needed to allow adjustment of the set screws.
[Model 8020 FW: Use the tracking knob at the back of the machine, shown in Figure 7.]
IMPORTANT: Tracking adjustments are sensitive; make them in small increments and allow the blade time to react to the changes.
6. When satisfied, return the upper and lower
blade guides close to the blade.
7. Close upper door, reconnect Band Saw to
power, and run it for a few moments. Make any further tracking adjustments as needed, with the machine disconnected from power.
Blade Guides
Blade guides must be properly adjusted or damage may occur to the blade and/or guides.
1. Loosen the two socket head cap screws on
the guide housing. See Figure 8.
2. Position the guide support in accordance
with the width of the blade. The blade guides must be adjusted far enough back to clear the blade even during the cutting operation when the blade is deflected toward the rear. The front end of the blade guides should be adjusted approximately 1/8” behind the blade teeth. See Figure 8.
Figure 8
Figure 9
12
3. Tighten the socket head cap screws
securely.
4. This procedure should be done for both
upper and lower guide housings.
5. Open upper door and rotate the wheel by
hand until the weld portion of the blade is between the two blade guides.
6. Loosen the socket head cap screws (Figure
9) on the blade guides.
7. Move the blade guides so they are as close
to the blade as possible without touching it.
8. Tighten the socket head cap screws (Figure
9). Make sure the air nozzle is still directed properly toward the cutting area.
9. This procedure should be done for both
upper and lower blade guides.
As the blade guides receive use, they will become worn at the front end. If the blade guides become difficult to adjust, switch the left and right blade guides (Figure 10).
The stopper positioned behind the back edge of the blade (Figure 10) will also become worn with use, and the friction of the shaft with the saw blade may cause lines in the surface of the stopper. If this occurs, loosen the socket head cap screw, and rotate the stopper to either side to change its position on the blade. Re-tighten socket head cap screw.
Squaring Work Table with Blade
1. Place the table in horizontal position with “0”
on the scale.
2. Place a machinist’s square on the table and
against the blade, as shown in Figure 11, for side-to-side squaring of the table. Place the square against the edge of the blade for front-to-back squaring.
3. If the square is not flush against the blade,
loosen either set of socket head screws below the table (Figure 12) with a hex wrench (provided). Make adjustments as necessary, and tighten the screws.
4. Make sure the pointer is set at “0” on both
scales. If it needs slight adjustment, loosen the screw and shift the pointer until it aligns with “0”. Re-tighten the screw.
Figure 10
Figure 11
Figure 12
13
Replacing Drive Belts
(See Figure 13)
1. Disconnect machine from power source.
2. To remove the air compressor belt, loosen
the two hex cap screws (A, Figure 13) on the mounting plate and tilt the air compressor toward the motor. After installing a new belt, tilt the air compressor away from the motor to tension the belt, and re-tighten the two hex cap screws.
3. To remove the motor drive belt, first
remove the air compressor belt (see above). Then loosen the two lock nuts (B, Figure 13) on the motor bracket. Lift up on the motor to slacken and remove the belt. After installing a new motor drive belt, push the motor back down and tighten the two lock nuts.
4. To remove the variator belt, first slide the
motor drive belt off the variator pulley (see above). Then lift up on the variator pulley (Figure 13) to slacken the belt.
5. After installing new belts, make sure they
are tensioned properly and all screws or nuts are re-tightened.
Work Lamp Bulb
The Work Lamp uses a standard medium-base 60 watt bulb (not provided).
Figure 13
(Model 8014FW)
Band Saw Operation
Consult “Features and Terminology” on page 7 for identification of the controls.
On the Model 8020FW, Unlock the control panel using the provided keys.
Never operate the band saw
without blade guards in place and secured.
Blade Break-In Procedure
New blades are very sharp and, therefore, have a tooth geometry that is easily damaged if a careful break-in procedure is not followed. Consult the blade manufacturer’s literature for break-in of specific blades on specific materials. The following procedure will be adequate, however, for break-in of blades on lower alloy ferrous materials.
1. Use a section of round stock.
2. Operate the saw at low speed. Start the cut
with a very light feed rate.
14
3. When the saw has completed about 1/3 of
the cut, increase the feed rate slightly and allow the saw to complete the cut.
4. Keep the feed rate at the same setting and
begin a second cut on the same or similar workpiece.
5. When the saw has completed about 1/3 of
the cut, increase the feed rate while watching the chip formation until cutting is at its most efficient rate (refer to “Evaluating Cutting Efficiency” below). Allow the saw to complete the cut.
6. The blade is now considered ready for use.
Setting Blade Speed
1. Consult the Speed and Pitch selection chart
on the front of the band saw. A chart is also included on page 23 of this manual. Select the speed setting for the material to be cut.
2. Model 8020FW: While the machine is NOT
running, move the gear selector lever (Figure 15) to the required speed setting (high or low).
Figure 14
(Model 8014FW only)
Move the gear selector lever only when the machine is NOT running, to prevent damage to the gearbox.
3. Start the saw using the pushbutton.
4. Turn the variable speed handwheel (Figures
14 and 15) to the required speed. Turning the handwheel clockwise increases speed. Turning counterclockwise decreases speed.
Rotate the speed setting
handwheel only when the band saw is running.
Evaluating Cutting Efficiency
The best way to determine whether the blade is cutting efficiently is to observe the chips formed by the cutting.
If the chip formation is powdery, then the
feed is much too light, or the blade is dull.
If the chips formed are curled, but colored –
blue or straw colored from heat generated during the cut – then the feed rate is too high.
If the chips are slightly curled and are not
colored by heat – the blade is sufficiently sharp and is cutting at its most efficient rate.
Figure 15
(Model 8020FW only)
15
Welder Operation
Wear eye protection while operating the welder. Use care when handling the blade after welding to avoid burns.
The welding procedure involves the following steps: Shearing the blade, grinding teeth to allow for the weld area, the actual welding, inspection of the blade, annealing, grinding and a final inspection of the blade. This procedure can be accomplished using the shear and welder assemblies on your band saw. Proceed as follows:
Shearing
Cut the blade to the longest length needed for the band saw. Using the shear to cut your blade will ensure that the blade ends are cut flat, square and smooth.
1. Place the blade in the shear as shown in
Figure 16. Make sure the blade is held square with the shear knife, so that the cut will be square with the blade.
2. Position the blade so that the cut is made at
a place that allows for uniform spacing of the teeth. See Figure 17.
Figure 16
3. Push down the handle.
IMPORTANT: If a blade has been cut by using snips, the ends of the blade must be ground square before welding them together, as shown in Figure 18.
Removing Teeth
In fine pitched blades, one or more of the teeth on each side of the cut may need to be removed by grinding so that the weld area of the blade is uniform and the teeth will be uniformly spaced. See Figure 17.
Welding
4. Carefully clean the ends of the blade which
will contact the welder jaws. Remove any dirt, oil, scale and oxide.
Any rust on the blade in the
vicinity of the weld must be ground off before the blade can be welded.
Figure 17
Figure 18
16
5. Turn pressure knob to “0” position (pointed
downward). NOTE: There will be some resistance when turning the knob.
6. Insert one end of the blade in the left clamp
(Figure 19). Position the back edge of the blade against the back edge of the left clamp. Then position the end of the blade midway between the left and right clamps. Tighten the left clamp.
7. Insert the other end of the blade in the right
clamp. Position the back edge of the blade against the back of the right clamp. Then butt the end of the blade against the other end of the blade (the blade ends need to be in contact with each other). Tighten the right clamp.
8. Set the pressure selector switch
(counterclockwise rotation) to the approximate setting required for the width of the blade being welded.
Keep hands clear of the weld area and the clamp jaws during welding.
9. Press and hold the weld button (Figure 19).
When the weld button is pushed, the clamps move together to apply pressure to the blade ends. At the same time, sparks will come from the blade ends as they are being welded. Do not release weld button until the blade joint is “red hot.”
Figure 19
10. Release the weld button, and wait 3 or 4
seconds until blade returns to original color. Unclamp the blade.
11. Rotate the pressure selector switch to “0”.
The welder is designed for
intermittent use. Repeated welding within a short period of time may cause the welder to overheat.
12. Remove the blade from the clamps, and
carefully inspect it. The spacing of the teeth should be uniform and the weld should be located in the center of the gullet. Misalignment is easily noted at this time from the weld appearance. See Figure 20 for examples of incorrect welds.
13. If the weld is imperfect, refer to the trouble-
shooting section on page 28 for possible remedies to any problems. Make corrections before annealing.
Annealing
The blade must now be annealed, or cooled at a controlled rate to prevent it becoming too brittle.
Figure 20
17
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