This .pdf document is bookmarked Operating Instructions and Parts Manual 8x12-inch Gear Head Horizontal Band Saw Model HBS-812G JET 427 New Sanford Road LaVergne, Tennessee 37086 Ph.: 800-274-6848 www.jettools.com Part No.
1.0 Warranty and Service JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday. Warranty Period The general warranty lasts for the time period specified in the literature included with your product or on the official JET branded website. • JET products carry a limited warranty which varies in duration based upon the product.
2.0 Table of Contents Section Page 1.0 Warranty and Service ............................................................................................................................................. 2 2.0 Table of Contents ................................................................................................................................................... 3 3.0 Safety Warnings ....................................................................................................................
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. 3.0 Safety Warnings 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.
26. 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. 27. Use recommended accessories; accessories may be hazardous. 32. Remove loose items and unnecessary work pieces from the area before starting the machine. improper Familiarize yourself with the following safety notices used in this manual: 28. Maintain tools with care.
5.0 Features Figure 1 1. Blade tension handle 12. Coolant toggle switch 2. Cast iron bow 13. Handle 3. Coolant taps 14. Bow stop screw 4. 3-speed gearbox 15. Vise handwheel 5. 1HP motor 16. Cast iron table 6. Ball bearing blade guides 17. On/off toggle switch 7. Chip brush 18. Floating vise jaw (adjustable) 8. Hydraulic cylinder with regulator valve 19. Fixed vise jaw (adjustable) 9. Adjustable work stop 20. Shut-off tab 10. Rubber tires 21. Drain pan 11.
Capacities: Vise adjustment angle........................................................................................................................ 0 to 45 deg. Round capacity at 90° ........................................................................................................................8” (203 mm) Round capacity at 45° ........................................................................................................................5” (127 mm) Rectangle capacity at 90° (W x H) ...
7.0 Set-Up and Assembly 7.1 Unpacking and cleanup Inspect contents of shipping container for shipping damage. Report any damage to your distributor. Remove all contents from carton, and compare to the contents list in this manual. Report any part shortages to your distributor. Do not discard carton or packing material until machine is assembled and running satisfactorily. Exposed metal areas have a rust preventative applied. Remove this with a soft rag and solvent or degreaser.
Figure 4 7. 7.3 Assembly Refer to Figure 4. Band Saw should be disconnected from electrical power during assembly and setup. Remove stop bolt (X, Figure 4) and remove shipping bracket (Y). Retain bracket in case you must transport the machine in the future. Reinstall stop bolt. 1. Remove brackets holding saw to pallet. After removal of shipping bracket (Y), the stop bolt (X) must be reinstalled and properly adjusted to prevent damage to the on/off switch. 2.
Figure 5 4. 5. Figure 8 Guide blade through slot in vertical cutting plate (D, Figure 5), and tighten with the two screws. 7.5 Coolant system Verify that vertical cutting plate is square to blade, using a machinist’s square on the plate and against the blade (Figure 6). Make sure there is coolant in the tank before operating, to prevent damage to pump. Use of a water-soluble coolant will increase cutting efficiency and prolong blade life. Do not use black cutting oil as a substitute. Figure 6 6.
2. Grounded, cord-connected tools intended for use on a supply circuit having a nominal rating less than 150 volts: 8.0 Electrical connections This tool is intended for use on a circuit that has an outlet that looks like the one illustrated in A, Figure 10. 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.
9.0 Adjustments The settings on your band saw, such as blade squareness and tracking, were carefully performed by the manufacturer. You should, however, verify these before operating, in case misalignment has occurred during shipping. 9.1 Squaring blade to table Figure 11 1. Disconnect machine from power source. 2. Place machinist’s square (A, Figure 13) on table and against blade. 3. Check to see that blade contacts the square along entire width of blade. 4.
with workpiece, allowing it to conform to the angle. 4. Tighten screws (E). 5. Tighten clamping pressure with handwheel. 9.3.3 Extended capacity 1. Remove two screws (C, Figure 16). 2. Reposition fixed vise in the secondary holes (H). 3. Reinstall screws (C) and tighten. Figure 14 9.3 Vise positioning 9.3.1 90-degree cut Keep hands away from blade while adjusting vise. Do not make any adjustments to vise while the machine is running. 1.
observing chip formation. See section 11.4, Evaluating cutting efficiency. they straddle the work, severe damage to the workpiece and to the blade can result. To replace a blade: 9.5 Counterbalance spring The counterbalance spring helps control the amount of weight the saw bow puts on the workpiece when the hydraulic control valve is fully open. The hydraulic cylinder will not compensate for improper counterbalance. 1. Disconnect machine from power source. 2.
9. 9.8 Blade tracking Position blade around wheels, making sure it rests near the flange on both wheels. Tracking the blade requires that the band saw be operating while the back cover is removed. This adjustment should be performed by qualified persons only. 10. Tension blade using handle. Do not overtension. See section 9.7, Blade tension. 11. Close back cover and secure with knobs. 12. Install red blade guard, and brush assembly. 14. Run machine to verify that blade is tracking properly.
Keep fingers clear of blade and wheel to avoid injury. 7. Turn set screw to stop shifting of blade on the wheel as it gets closer to wheel flange. Put a six-inch length of paper between blade and wheel. The paper should not be cut as it passes between wheel flange and blade. 8. Turn set screw a small amount. Repeat the insertion of paper between wheel flange and blade until paper is cut into two pieces.
9.11 Blade guide adjustment 1. Loosen knobs (A, Figure 24). 2. Slide guide assemblies as close to workpiece as possible without interfering with cut. This will prevent excessive blade exposure, and deflection of blade during cutting. 3. Make sure power is disconnected and hands are protected before handling blade. 6. Tighten nut (D). 7. Repeat for other blade guide assembly. Retighten knobs. Figure 26 9.
following procedure will be adequate for break-in of JET-supplied blades on lower alloy ferrous materials. 10.0 Operating controls To start saw, toggle switch (C, Figure 27) to ON. To stop saw before it reaches the end of cut, toggle switch (C) to OFF. Otherwise, saw will automatically stop at the end of a cut. Toggle the coolant switch (D, Figure 28) to ON. Flow of coolant to blade area is controlled by the taps connected to the blade guide assemblies. Figure 28 3.
3. Position work stop if needed. 4. Position blade guides as close to workpiece as possible. 5. Move speed setting lever to desired position. Do not move speed setting lever during a cutting operation. 6. Set a suitable feed rate for that operation on the hydraulic cylinder dial. 7. Toggle ON switch to begin blade rotation. Allow blade to reach full speed before beginning cut. 8. Turn on coolant flow. Adjust flow valves as needed. 9.
Periodically, after draining remove screws, cover and gasket, and wipe out residual oil from gearbox interior with a rag, before refilling. Also do this if changing oil brands. Figure 31 13.0 Troubleshooting the HBS-812G Trouble Probable Cause Remedy Motor will not start. No incoming power. Check plug connection. Blown electrical panel fuses or tripped circuit breakers. Replace fuses, or reset breakers. Defective motor, switch, power cable, or plug.
Trouble Probable Cause Remedy Excessive blade breakage. Incorrect blade tension. Adjust blade tension. Incorrect blade speed or feed rate. Adjust accordingly. Workpiece loose in vise. Clamp workpiece securely. Blade rubs on wheel flange. Adjust blade tracking. Teeth too coarse for material. Use appropriate blade for material. Teeth in contact with workpiece before saw is started. Start motor before blade contacts workpiece. Blade guides are misaligned. Adjust blade guides as needed.
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14.1.3 HBS-812G Table, Bow, Stand Assemblies – Parts List Index No. Part No. Description Size Qty 1 ................ HBS812G-1G ............ Bottom Pan .............................................................. ...................................... 1 2 ................ HBS812G-2G ............ Leg (Left) ................................................................. ...................................... 1 2-1 ............. HBS812G -2-1........... Foot Stand ......................................
Index No. Part No. Description Size Qty 59 .............. HBS812G-59 ............. Support Bracket ....................................................... ...................................... 1 60 .............. HBS812G-60 ............. Stop Screw .............................................................. ...................................... 1 61 .............. TS-0561021 .............. Hex Nut .................................................................... 5/16"............................
Index No. Part No. Description Size Qty 126 ............ HVBS710SG-129 ...... Vent Plug ................................................................. ...................................... 1 127 ............ .................................. Blade (local purchase) ............................................. 3/4" x 0.032" x 93" ........ 1 128 ............ HBS812G-128 ........... Blade Back Cover .................................................... ...................................... 1 129 .....
Index No. Part No. Description Size Qty 192-2 ......... HVBS710SG-192-2 ... Strain Relief ............................................................. ...................................... 1 193 ............ HVBS710S-193 ......... Key........................................................................... 5 x 5 x 20 mm ............... 1 194 ............ HVBS710SG-328 ...... Worm Shaft .............................................................. ...................................... 1 195 .......
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14.2.2 HBS-812G Gearbox Assembly – Parts List Index No. Part No. Description Size Qty .................. HVBS710SG-196-1N .... Gearbox Assembly (index #1 thru 42) (serial #150600350 and higher) ........ 1 1 ................ HVBS710SG-129 .......... Vent Plug .............................................................. ...................................... 1 2 ................ TS-1504061 .................. Hex Socket Head Cap Screw .............................. M8x30 .......................... 5 3N .
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427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.
