JET HBS-916, HBS-1018 Operating Instructions and Parts Manual

HBS-916

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Operating Instructions and Parts Manual

Four-speed Pulley Horizontal Band Saw

Models HBS-916, HBS-1018

shown

For HBS-916 and HBS-1018 manufactured 01-2020 and later

JET

01/2021

1.0 IMPORTANT SAFETY

INSTRUCTIONS

WARNING – To reduce risk of injury:

1. Read and understand the entire owner's 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 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, JET disclaims any real or implied warranty and holds itself harmless from any injury that may result from that use.

6. Always wear leather gloves when handling saw

blades. The operator shall not wear gloves when operating the machine.

7. Machinery should be anchored to the floor if

there is any risk of sliding or tipping during operation.

8. Secure work. Use clamps or a vise to hold work,

when practical. It is safer than using your hands and it frees both hands to operate the machine.

9. All doors shall be closed, all panels replaced,

and other safety guards in place prior to the machine being started or operated.

10. 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 come up to full speed before bringing the saw blade into contact with the workpiece.

11. Keep hands away from the blade area.

12. Remove any cut off piece carefully while

keeping your hands free of the blade area.

13. Bring adjustable saw guides and guards as

close as possible to the workpiece.

14. 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 breakage of eye protection.

15. Wear proper apparel. No loose clothing or

jewelry which can get caught in moving parts. Confine long hair.

16. Anti-skid floor strips, nonslip footwear and

safety shoes are recommended.

17. Wear hearing protection (plugs or muffs) if

sound reaches unsafe levels.

18. The workpiece, or part being sawn, must be

securely clamped before the saw blade enters the workpiece.

19. Remove cut off pieces carefully, keeping hands

away from saw blade.

20. Saw must be stopped and electrical supply cut

off or machine unplugged before reaching into cutting area, before any blade replacement or adjustment of blade support mechanism is done, or before any attempt is made to change the drive belts, or before any periodic service or maintenance is performed on the saw.

21. Avoid contact with coolant, especially guarding

your eyes.

22. Make certain the switch is in the OFF position before connecting the machine to the power supply.

23. This saw must be grounded in accordance with

the National Electrical Code and local codes and ordinances. This work should be done by a qualified electrician. The saw must be grounded to protect the user from electrical shock. Caution: For circuits which are far away from 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 sect. 6.3, Table 2, is recommended.

24. Remove loose items and unnecessary

workpieces from area before starting machine.

25. 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.

26. 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 after completion of maintenance.

27. 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.

28. Maintain all machine tools with care. Follow all

maintenance instructions for lubricating and the changing of accessories.

29. 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.

30. Keep work area clean. Cluttered areas invite accidents. Keep the floor around the machine clean and free of scrap material, oil and grease.

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

32. Make your workshop child proof with padlocks, master switches or by removing starter keys.

33. Give your work undivided attention. Looking around, carrying on a conversation and “horseplay” are careless acts that can result in serious injury.

34. Maintain a balanced stance at all times so that you do not fall into the blade or other moving parts. Do not overreach or use excessive force to perform any machine operation.

35. 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 more safely.

36. Use only recommended accessories; improper accessories may be hazardous.

37. Keep saw blades sharp and clean for the best and safest performance.

38. Turn off the machine before cleaning. Use a brush or vacuum to remove chips or debris — do not use bare hands. Never brush away chips while machine is in operation.

39. Do not stand on the machine. Serious injury could occur if the machine tips over.

40. Never leave the machine running unattended. Turn off power and do not leave the machine until it comes to a complete stop.

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

WARNING: This product can expose you to chemicals including titanium dioxide which is known to the State of California to cause cancer, and lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to http://www.p65warnings.ca.gov.

WARNING: Some dust, fumes and gases created by power sanding, sawing, grinding, drilling, welding and other construction activities contain chemicals known to the State of California to cause cancer and 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 wellventilated area and work with approved safety equipment, such as dust masks that are specifically designed to filter out microscopic particles. For more information go to http://www.p65warnings.ca.gov/ and http://www. p65warnings.ca.gov/wood.

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

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

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

SAVE THESE INSTRUCTIONS

2.0 Table of contents

Section Page

1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2

2.0 Table of contents ............................................................................................................................................ 4

3.0 About this manual .......................................................................................................................................... 5

4.0 Specifications ................................................................................................................................................. 6

5.0 Setup and assembly ....................................................................................................................................... 8

5.1 Shipping contents ....................................................................................................................................... 8

5.2 Tools required for assembly ....................................................................................................................... 8

5.3 Uncrating and spotting ............................................................................................................................... 8

5.4 Assembly .................................................................................................................................................... 8

5.5 Control box ................................................................................................................................................. 9

5.6 Lubrication .................................................................................................................................................. 9

6.0 Electrical connections .................................................................................................................................... 9

6.1 Connecting motor cable ............................................................................................................................. 9

6.2 Grounding instructions ............................................................................................................................. 10

6.3 Extension cords ........................................................................................................................................ 10

6.4 Voltage conversion ................................................................................................................................... 10

7.0 Adjustments ................................................................................................................................................. 11

7.1 Removing and installing blades ................................................................................................................ 11

7.2 Blade tension ............................................................................................................................................ 11

7.3 Blade tracking ........................................................................................................................................... 11

7.4 Blade guide bracket adjustment ............................................................................................................... 12

7.5 Blade guide adjustments .......................................................................................................................... 12

7.6 Test cutting to verify adjustment ............................................................................................................... 12

7.7 Changing blade speeds ............................................................................................................................ 13

7.8 Bow weight adjustment ............................................................................................................................ 13

7.9 Vise adjustments ...................................................................................................................................... 13

7.10 Work stop adjustment ............................................................................................................................. 14

7.11 Limit switch adjustment .......................................................................................................................... 14

8.0 Operating controls ........................................................................................................................................ 14

9.0 Prior to Operation ......................................................................................................................................... 15

10.0 Operation ................................................................................................................................................... 15

10.1 Blade selection ....................................................................................................................................... 15

10.2 Blade break-in procedure ....................................................................................................................... 15

10.3 Evaluating cutting efficiency ................................................................................................................... 16

11.0 User-maintenance ...................................................................................................................................... 16

11.1 Lubrication .............................................................................................................................................. 16

11.2 Pulley alignment ..................................................................................................................................... 17

11.3 Additional servicing ................................................................................................................................ 17

11.4 Lubrication schedule .............................................................................................................................. 18

12.0 Blade speed ............................................................................................................................................... 18

13.0 Troubleshooting HBS-916, HBS-1018 ....................................................................................................... 19

14.0 Replacement Parts ..................................................................................................................................... 20

14.1.1 HBS-916, HBS-1018 – Bed and Base Assembly – Exploded View ..................................................... 21

14.1.2 HBS-916 – Bow Assembly – Exploded View ...................................................................................... 22

14.1.3 HBS-1018 – Bow Assembly – Exploded View .................................................................................... 23

14.1.4 HBS-916, HBS-1018 – Parts List ........................................................................................................ 24

14.2.1 HBS-916, HBS-1018 – Gear Speed Reducing Box – Exploded View ................................................. 30

14.2.2 HBS-916, HBS-1018 – Gear Speed Reducing Box – Parts List ......................................................... 31

5.0 Electrical Connections .................................................................................................................................. 32

15.1 Electrical Connections – HBS-916 only .................................................................................................. 32

15.2 Electrical Connections – HBS-1018 only ................................................................................................ 33

16.0 Warranty and service ................................................................................................................................. 34

3.0 About this manual

This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model HBS916 and HBS-1018 Horizontal Band Saw. This manual contains instructions on installation, safety precautions, general operating procedures, maintenance instructions and parts breakdown. Your machine has been designed and constructed to provide consistent, long-term operation if used in accordance with the instructions set forth in this document.

If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our web site: www.jettools.com.

Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.

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

operation. Failure to comply may cause serious injury.

Mail the provided registration card, or register your product online -

http://www.jettools.com/us/en/service-and-support/warranty/registration/

4.0 Specifications

Table 1

Stock number Model number HBS-916 HBS-1018

Motor and Electricals

Main motor type Totally-enclosed, fan-cooled, AC induction

Horsepower 1-1/2 HP (1.1 kW) 2 HP (1.5 kW) Phase single Voltage 115 / 230V (prewired 115) 230V Cycle 60 Hz Listed FLA (full load amps) 17/8.5 13 Starting amps/inrush current 53 40 Running amps, no load 12 7.2

Motor speed 1720 RPM On/off switch magnetic, push-button, with E-stop Power transfer V-belt/4-step pulley, to gear reducer Gearbox ratio Power cable and plug Recommended circuit size 1 15 A Sound emission 2 70dB at 3 ft. from machine Coolant pump 1/8HP, 115/230V, 1PH, 60Hz

Capacities

Round

Square (WxH)

Rectangle (WxH)

Maximum jaw opening at 90°

Blade (WxTxL)

Blade wheel size (Dia. x W) 13 x 1 in. (330 x 25.4 mm) 14 x 1 in. (355 x 25.4 mm) Blade speeds 82, 132, 170, 235 82, 132, 210, 330 Gearbox reservoir 1200cc 1200cc Cutting fluid/coolant tank 22 liter 31.32 liter Vise operation 45° swivel

Main materials

Stand Steel Bow Cast iron and steel Blade wheels Cast iron Bed Cast iron Vise jaws Cast iron

General dimensions, approx.

Height of bed from floor 25 in. Overall dimensions, assembled (LxWxH)

bow lowered ~ bow raised Shipping dimensions (LxWxH) 67 x 25 x 46-1/4 in.

Weights, approx.

Net weight (approx.) 726 lbs. (330kg) 805 lbs. (366kg) Shipping weight (approx.) 818 lbs. (372kg) 906 lbs. (412kg)

fixed jaw in inner holes 13-1/2 in. (343 mm) 15 in. (381 mm) fixed jaw in outer holes 16-3/4 in. (425.5 mm) 18-1/4 in. (463.5 mm)

90 deg. 9 in. (228 mm) 10 in. (250 mm) 45 deg. 6-1/8 in. (155 mm) 7-1/2 in. (190 mm) 90 deg. 9 x 9 in. (228 x 228 mm) 10 x 10 in. (250 x 250 mm) 45 deg. 6 x 6 in. (150 x 150 mm) 7-3/8 x 7-3/8 in. (187 x 187mm)

90 deg.

45 deg.

14AWGx3C, 6 ft., with 5-15P plug 14AWGx3C, 6 ft., with 6-15P plug

2 x 16 in. (50.8 x 406 mm)

9 x 12 in. (228 x 305 mm)

9 x 6-1/8 in. (228 x 155 mm)

9 x 6 in. (228 x 150 mm)

HSS-M42; 1x0.035x119-1/2 in.

(1651 x 711 x 1041~1702 mm)

(1702 x 635 x 1175 mm)

414468 414473

1:30

6 x 18 in. (152 x 457 mm)

10 x 16 in. (250 x 406 mm)

9 x 7-3/4 in. (228 x 197 mm)

10 x 7-3/8 in. (250 x 187 mm)

HSS-M42; 1x0.035x130 in.

(4/6T)

65 x 28 x 41~67 in.

67-3/4 x 28 x 42-1/2~70 in.

(1721 x 711 x 1079.5~1778 mm)

(1803.4 x 635 x 1206.5 mm)

(4/6T)

71 x 25 x 47-1/2 in.

Subject to local/national electrical codes. Circuit must be protected by appropriately rated fuses or breaker.

The specified values are emission levels and are not necessarily to be seen as safe operating levels. As workplace conditions vary, this information is intended to allow the user to make a better estimation of the hazards and risks involved only.

L = length, W = width, H = height

T = thickness

Dia = diameter

SFPM = surface feet per minute

The specifications in this manual were current at time of publication, but because of our policy of continuous improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring obligations.

Read and understand the entire

contents of this manual before attempting assembly or operation. Failure to comply may cause serious injury.

5.0 Setup and assembly

5.1 Shipping contents

NOTE: Accessories are shipped in the coolant reservoir beneath the chip tray. To access, remove two wing screws and lift off chip tray.

1 Band saw with control box 1 Motor 1 Pulley cover 1 Locking handle* 4 Hex cap screws, M12x70 (for leveling)* 4 Hex nuts M12 (for leveling)* 1 Work stop knob 1 Work stop rod 1 Work stop bracket* 1 Work stop lock handle* 2 Open-end wrenches, 11/13 and 17/19* 4 Hex wrenches, 3,4,5,6 mm* 1 Flat blade screwdriver* 1 Cross point screwdriver* 1 Factory-cut test piece* 1 Operating Instructions and Parts Manual 1 Product registration card

* these items are in the provided tool box, p/n

HBS916-TB

5.2 Tools required for assembly

All tools needed for assembly are provided with the machine. Additional tools may be necessary for maintenance and adjustments.

5.3 Uncrating and spotting

5. Install four leveling screws with hex nuts (provided) into threaded holes on base flanges (Figure 5-1). Place a level on table surface and check side-to-side and front-to-back. Adjust leveling screws until machine is level in both directions, then tighten nuts.

Figure 5-1: leveling screws

6. Clean all rust preventative from surfaces with kerosene or a cleaner/degreaser. Do not use gasoline, paint thinner, mineral spirits, etc., as these may damage painted surfaces. After cleaning, apply a light coat of oil to exposed metal surfaces.

5.4 Assembly

Saw must be disconnected

from power during assembly procedures.

5.4.1 Motor

NOTE: Motor installation requires 2 persons.

1. Unbolt motor assembly from shipping pallet.

2. Remove nut and washer from motor support

shaft, and slide out support shaft (A, Figure 5-

2).

1. Finish uncrating the saw and inspect for shipping damage. Should any have occurred, contact your local distributor and carrier. Do not discard packing material until saw is assembled and running satisfactorily.

2. Compare contents of shipping crate with the list in sect. 5.1. Report shortages, if any, to your distributor.

3. Remove four screws holding machine to shipping pallet.

4. Use lifting straps that are isolated from the band saw’s finished surfaces and clear of any handles or levers; lift machine and place in desired location. The band saw should be located on a solid and level foundation for best performance. When determining location, allow room for servicing and moving large stock around the machine.

Figure 5-2: motor installation

3. Carefully lift motor and align holes in motor mounting plate and motor bracket.

4. Slide motor support shaft through motor mount bracket to secure motor in place. Use a rubber mallet if needed to tap shaft through the holes.

5. Reinstall nut and washer onto shaft.

6. Attach motor tilt plate (B, Figure 5-3) to motor bracket using the provided locking handle (C, Figure 5-3) with lock washer and flat washer.

Figure 5-3: motor locking handle

Note: Locking handle (C) is adjustable. Pull out on handle and rotate it on the pin to a more convenient position, then release it. Make sure it reseats on the pin.

5.4.2 V-belt and pulley cover

1. Loosen tilt locking handle (C, Figure 5-3), and allow motor to lower. Place v-belt around both pulleys.

2. Push up motor and tighten tilt locking handle (C) to tension v-belt. Correct tension is achieved when finger pressure midway between the two pulleys causes approximately 1/2” deflection. See Figure 5-4.

3. Remove two hex cap bolts and washers (D, Figure 5-4).

4. Position belt cover (E, Figure 5-4) around pulley shafts and attach to saw with the two bolts and washers.

5. Close pulley cover and fasten with knob.

using the saw, by checking the sight glass. (See Figure 11-2 for location.)

Cutting fluid/coolant must be supplied by the operator. See sect. 11.0.

6.0 Electrical connections

Electrical connections must be made by a qualified electrician in compliance with all relevant codes. This machine must be properly grounded while in use to protect the operator from electrical shock and possible fatal injury.

The HBS-916 (#414468) is rated for 115/230V single phase power, and is pre-wired 115 volt. It is supplied with a cord and plug designed for use on a circuit with a grounded outlet that looks like the one pictured in A, Figure 6-1. It may be converted to 230V power, see sect. 6.3.

The HBS-1018 (#414473) is rated at 230V only, single phase, and is supplied with a cord and plug designed for use on a circuit with a grounded outlet that looks like the one pictured in D, Figure 6-1.

Confirm that power available at the saw’s location matches that for which the saw is wired.

Before wiring, make sure saw is disconnected from power source or the fuses have been removed or breakers tripped in the circuit to which the saw will be connected. Use appropriate Lock-Out/Tag-Out

procedures.

6.1 Connecting motor cable

1. Loosen strain relief nut on motor junction box.

Remove junction box cover.

2. Insert motor cable (see F, Figure 5-2) through

strain relief and connect the leads inside the box. Make sure the grounding wire is properly connected.

3. Tighten strain relief nut and replace junction box

cover.

See sect. 4.0 for recommended circuit sizes. Local

codes take precedence over recommendations.

Figure 5-4: installing belt and pulley cover

5.5 Control box

Mount the control box atop the bow using the screws that are preinstalled in the two holes.

5.6 Lubrication

The band saw is shipped with the appropriate level of gear oil. The operator should verify this before

Figure 6-1: plug configurations

6.2 Grounding instructions

1. All Grounded, Cord-connected Tools:

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. This tool is equipped with an electric cord having an equipment-grounding conductor and a grounding plug. The plug must be plugged into a matching outlet that is properly installed and grounded in accordance with all local codes and ordinances.

Do not modify the plug provided - if it will not fit the outlet, have the proper outlet installed by a qualified electrician.

Improper connection of the equipment-grounding 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 equipment-grounding 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. Failure to comply may cause serious or fatal injury.

Use only 3-wire extension cords that have 3-prong grounding plugs and 3-pole receptacles that accept the tool's plug.

Repair or replace damaged or worn cord immediately.

2. Grounded, cord-connected tools intended for use on a supply circuit having a nominal rating less than 150 volts:

This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in A, Figure 6-1. An adapter, shown in B and C, may be used to connect this plug to a 2-pole receptacle as shown in B if a properly grounded outlet is not available. The temporary adapter should be used only until a properly grounded outlet can be installed by a qualified electrician. The green-colored rigid ear, lug, and the like, extending from the adapter must be connected to a permanent ground such as a properly grounded outlet box. Whenever the adaptor is used, it must be held in place by a metal screw.

In Canada, the use of a temporary adaptor is not permitted by the Canadian Electrical Code, C22.1.

3. Grounded, cord-connected tools intended for use on a supply circuit having a nominal rating between 150 - 250 volts, inclusive:

This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in D, Figure 6-1. Make sure the tool is connected to an outlet having the same configuration as the plug. No

adapter is available or should be used with this tool. If the tool must be reconnected for use on a different type of electric circuit, the reconnection should be made by qualified service personnel; and after reconnection, the tool should comply with all local codes and ordinances.

6.3 Extension cords

The use of extension cords is discouraged. Try to position equipment near the power source. If an extension cord becomes necessary, use only threewire extension cords that have three-prong grounding type plugs and three-prong receptacles that accept the tool's plug. Replace or repair damaged or worn cord immediately.

Make sure your extension cord is good condition, and is heavy enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating.

Table 2 shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage number (AWG), the heavier the cord.

Amp rating Volts Total length of cord in feet

More Than

0 6 18 16 16 14 6 10 18 16 14 12 10 12 16 16 14 12

12 16 14 12

Not More Than

120 240

AWG

25 50

100

200

Not Recommended

Extension Cord Recommendations

Table 2

6.4 Voltage conversion

Before wiring, make sure saw is disconnected from power source or the fuses have been removed or breakers tripped in the circuit to which the saw will be connected. Use appropriate Lock-Out/Tag-Out

procedures.

To change the HBS-916 voltage input to 230 volt:

1. Main motor – Open motor junction box cover.

Follow diagram inside cover to reconnect the incoming leads.

2. Coolant pump – Remove chip pan, remove

junction box cover on pump, and follow diagram inside junction box cover to change the leads.

3. Power cord – Replace the provided 115V plug

with a UL/CSA listed 230V plug. Or “hardwire” the machine directly to an electrical panel. (Make sure a disconnect is available for the operator.)

4. Control Transformer – Open electrical panel

on rear of base and change the fuse from 115V to 230V.

150 300

7.0 Adjustments

7.1 Removing and installing blades

A general purpose blade has been installed, tensioned, and tracked on the band saw and should not require immediate attention. For future blade replacement, proceed as follows:

1. Disconnect machine from power source.

2. Raise bow enough for blade to clear table slot. Secure bow position by turning hydraulic switch to off.

3. Loosen four knobs and open both blade wheel covers.

4. Remove upper gap cover (A, Figure 7-1, two knobs) and lower blade guard (B, one screw).

5. Release blade tension by turning blade tension handle (C) counterclockwise until blade is free.

Figure 7-1: installing blade

6. Back off blade guides (see sect. 7.5) and wire brush.

7. Remove blade from both wheels and out of each blade guide.

8. Make sure teeth of new blade are pointing in proper direction of travel. Work blade all the way up into blade guide bearings and guide blocks, with back of blade against rear support bearing. See sect. 7.5 for further details.

9. Position blade through upper slot. Put light tension on blade and work it onto both wheels.

Make sure back of blade is against shoulder of both wheels.

10. When you are sure that back of blade is against shoulder of both wheels and properly inserted into guides, finish putting tension on blade. See sect. 7.2.

11. Adjust guide bearings (sect. 7.5).

12. Connect power and jog the on/off button to be sure blade is in place and tracking properly. If blade is not tracking properly refer to sect. 7.3.

13. Close all covers and guards and tighten securely. Reposition wire brush.

7.2 Blade tension

Blade tension has been preset by the manufacturer; if further adjustment is required, or after installing a new blade, turn handwheel (C, Figure 7-1) clockwise to approximately 25,000 pounds, as indicated on adjacent tension scale.

NOTE: If band saw will remain idle for an extended period, back off blade tension to avoid unnecessary wear on wheels and components.

7.3 Blade tracking

Tools required: 17mm and 24mm wrenches

Blade tracking requires wheel covers open and blade moving. Use extreme caution and keep hands away from blade and wheel areas. Failure to comply may result in serious injury.

Blade tracking has been initially set by the manufacturer. Adjustment is rarely required when blade is correctly welded and used properly. Tracking is set properly when back of blade lightly touches shoulder of wheels. Note: Over-tracking (allowing blade back to rub hard against wheel shoulder) may damage blade wheels and blade.

If a tracking problem occurs, proceed as follows:

1. Disconnect machine from power source.

2. Raise bow enough to deactivate shut-off

sensor.

3. Loosen four knobs and open wheel covers.

Remove upper gap cover (A, Figure 7-1) and lower blade guard (B).

4. Back off left and right bearing guide assemblies.

5. NOTE: Maintain proper tension at all times

using blade tensioning mechanism.

6. Loosen center locking screws (D

in all three hex adjustment screws (D

Figure 7-2

While performing the following, keep blade from rubbing excessively on wheel shoulder, which can damage wheel and/or blade.

, Figure 8-3)

2,D3

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