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 ....................................................................................................................
14. 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 maintenance is complete. 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.
29. Do not stand on the machine. Serious injury could occur if the machine tips over. 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.
5.0 Features Figure 1 1. Blade tension handle 12. Coolant toggle switch 2. 3. Cast iron bow Coolant taps 13. Handle 14. Bow stop screw 4. 5. 3-speed gearbox 1HP motor 15. Vise handwheel 16. Cast iron table 6. 7. Ball bearing blade guides Chip brush 17. On/off toggle switch 18. Floating vise jaw (adjustable) 8. Hydraulic cylinder with regulator valve 9. Adjustable work stop 10. Rubber tires 19. Fixed vise jaw (adjustable) 20. Shut-off tab 21. Drain pan 11. Steel stand with coolant tank 6.
Capacities: Vise adjustment angle ............................................................................................................................. 0 to 45 deg. Round capacity at 90°............................................................................................................................. 8” (203 mm) Round capacity at 45°.............................................................................................................................
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.
9.5 Counterbalance spring 1. Disconnect machine from power source. 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. 2. Raise bow to vertical position, and secure in place by turning off hydraulic cylinder. 3. Remove red blade guard by removing two screws (A, Figure 19).
11. Close back cover and secure with knobs. used properly and if the blade is correctly welded. If a tracking problem occurs, first inspect blade condition, then adjust tracking as follows: 12. Install red blade guard, and brush assembly. 13. Connect machine to power source. 14. Run machine to verify that blade is tracking properly. See section 9.8, Blade tracking. 9.7 Blade tension Disconnect machine from power source, and use caution when working with sharp blade. 1.
8. Turn set screw a small amount. Repeat the insertion of paper between wheel flange and blade until paper is cut into two pieces. NOTE: You may have to repeat the check with the paper several times before the blade and the flange cut the paper into two pieces. Do not hurry the adjustment. Patience and accuracy here will pay off with better, more accurate, quieter cutting and longer machine and blade life. 9. When the paper is cut, back off the set screw slightly.
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.
