This .pdf document is bookmarked Operating Instructions and Parts Manual 10” x 16” Horizontal Band Saw Models J-7020, J-7040 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 ..................................................................................................................................
General Machinery Warnings 1. Always wear protective eye wear when operating machinery. Eye wear shall be impact resistant, protective safety glasses with side shields which comply with ANSI Z87.1 specifications. Use of eye wear which does not comply with ANSI Z87.1 specifications could result in severe injury from the breakage of the eye protection. 2. Wear proper apparel. No loose clothing or jewelry which can get caught in moving parts. Rubber soled, nonslip, footwear is recommended for best footing.
18. Keep hands in sight and clear of all moving parts and cutting surfaces. motor shall be started and you should allow the saw to achieve full speed before bringing the saw blade into contact with the workpiece. 19. All visitors should be kept at a safe distance from the work area. Make your workshop completely safe by using padlocks, master switches, or by removing starter keys. 4. Keep hands away from the blade area. 5. 20.
4.0 About this machine and manual The JET Models J-7020 and J-7040 Horizontal Cut-Off Band Saws are ruggedly built, precision-oriented machines designed for either wet or dry applications. The 2-horsepower motor along with the worm gear reduction drive train in an oil bath, transmits smooth and positive power to the blade. This drive system coupled with the recirculating coolant system keeps the blade running cool and true, which results in longer blade life.
Speeds and capacities: Blade speed .............................. variable 100-350 fpm ............. variable 100-350 fpm ........... variable 100-350 fpm Round capacity at 90-degrees ................ 10” (255mm) ......................... 10” (255mm) ........................10” (255mm) Round capacity at 45-degrees ................ 10” (255mm) ......................... 10” (255mm) ........................10” (255mm) Rectangular capacity at 90-degrees .....7”x16”/10”x10” .......................
NOTE: Local codes take precedence over recommendations. 6.0 Machine setup The saw delivered to you has been adjusted at the factory. A number of test pieces have been cut using the saw to verify the accuracy of cutting. Therefore, the only setup operations required before releasing the saw for service are spotting the saw and establishing the electrical connections to the motor. 8.0 Operating instructions 8.
knob is turned counterclockwise. Speed decreases when the knob is turned clockwise. 8.4 Controlling the cut: Hydraulic feed control 2. A placard on the drive belt guard provides recommended speeds for various materials. 3. A speed indicator is provided on the barrel of the adjustment mechanism. The indicator provides speed indications in feet per minute and meters per minute. (The meters per minute values are shown in parenthesis on the indicator.
If the chip formation is powdery, then the feed rate is much too light, or the blade is dull. 3. If the chips formed are curled, but colored — that is, either blue or straw-colored from heat generated during the cut — then the feed rate is too high. When the saw has completed 1/3 of the cut, increase the feed rate slightly and allow the saw to complete the cut. 4. 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.
vise jaw. Put the rear end of the workpiece against the angle-setting block. 4. Install the locking knob in the hole in the side of the stop L-bracket. 4. Turn clamping hand wheel clockwise until the left vise jaw is parallel with the workpiece. Tighten the pivot screw and angle locking screw on the left vise jaw. Clamp the workpiece in position. 5. 5. After completing the cut, turn the clamping hand wheel counterclockwise and slide the left jaw away from the workpiece.
7. DO NOT DROP THE SAW HEAD OR FORCE THE CUT. Let the weight of the saw head provide the cutting force. 8. The saw will automatically shut off at the end of the cut. used properly or if the blade is correctly welded. (See Figure 10 for location of blade tracking adjustment screws.) 10.1 Coolant flow The coolant pump must be submerged before operating to prevent damage to the pump. 1. The blade guides are fitted with coolant fittings. Coolant is provided to the fittings through interconnecting tubing.
blade guide bearings are adjusted at the factory. They should rarely require adjustment. When adjustment is required, adjust immediately. Failure to maintain proper blade adjustment may cause serious blade damage or inaccurate cuts. length of paper between the blade and the wheel as shown in Figure 11. The paper should not be cut as it passes between the wheel shoulder and the blade. 9. Turn the single hex adjustment screw a small amount.
(The blade should be in a vertical position between the bearings. (See Figure 13.) 5. Tighten the center locking screw with an Allen wrench while holding the eccentric bushing in position with the 3/4-inch wrench. 6. Use the same procedure to adjust the other guide bearing. 7. When the adjustment is correct, the guide bearings should rotate freely with slight pressure of the finger (with the blade stopped). 8. Adjust blade-edge bearings so they just touch the back edge of the blade (see Figure 18).
12.2 Lubrication 5. Turn the blade tensioning hand wheel counterclockwise to tighten the blade. Tighten the blade until the blade tension indicator reads 2000 pounds. 6. Operate the saw at low speed and observe the tracking of the blade. If tracking needs to be adjusted, refer to sect. 11.1, Blade tracking adjustment. Lubricate the following components at the specified frequencies and using the lubricants as defined: 1.
12.8 Replacing idler wheel or idler bearing 12.5 Replacing drive motor 1. Disconnect the motor from all electrical power. Unplug the motor if it is plugged into a socket. Shut off the power to the branch and remove the connection to the junction box if the motor is hard wired to the branch. 1. Remove the saw blade (see sect. 12.3, Changing blades). 2. Remove the screw, spring washer, and washer from the idler shaft. 2. Remove the drive belt from the drive motor pulley (see sect. 12.
12.10 Replacing carbide blade guide 2. Insert the capscrew into the new bearing. Replace the spring washer onto the capscrew and re-install into the floating block. 3. If re-adjustment is necessary, loosen the pivot capscrew and move the floating block so that the blade edge is close to the guide support, but cannot touch the bottom surface of it when the saw blade is cutting a workpiece. Refer to Figure 17. 1. Remove the cap screw and remove the carbide guide. Discard the carbide guide. 2.
13.0 Troubleshooting the J-7020/7040 Band Saws Symptom Possible Cause Correction Excessive blade breakage Material loose in vise. Clamp work securely. Incorrect speed or feed. Saw blade is in contact with workpiece before the saw is started. Blade rubs on the wheel flange. Check machinist’s handbook for speed/feed appropriate for the material being cut. Check machinist’s handbook for recommended blade type. Adjust blade tension to the point where the blade just does not slip on the wheel.
Symptom Possible Cause Correction Unusual wear on side/back of blade Blade guides worn Replace blade guides. Blade guide bearings not adjusted. Adjust blade guide bearings. Blade guide bearing bracket is loose. Tighten blade guide bearing bracket. Blade tooth pitch too coarse for workpiece. Feed too slow; feed too fast. Use blade with finer tooth pitch. Teeth missing/ripped from blade Workpiece vibrating.
14.1.
14.1.2 Base (J-7020/7040) – Parts List Index No Part No Description Size Qty 1 ................ J-5712251G .............. Foot, Left.................................................................. ...................................... 1 2 ................ J-5712261G .............. Foot, Right ............................................................... ...................................... 1 3 ................ J-5712271G .............. Coolant Reservoir ...........................................
Index No Part No Description Size Qty 40-2 ........... TS-0720081 .............. Spring Washer ......................................................... 5/16".............................. 2 40-3 .......... TS-0680031 ............. Washer .................................................................... 5/16".............................. 2 41 .............. 5712691 .................... Nut ........................................................................... 3/8"...............................
Index No Part No Description Size Qty 184-1 ......... TS-0720081 .............. Spring Washer ......................................................... 5/16".............................. 4 185 ............ 5713151 .................... Screw....................................................................... 3/8" x 1"......................... 2 186 ............ 5713161 .................... Washer .................................................................... 3/8"................................
14.2.
14.2.2 Head (J-7020/7040) – Parts List Index No Part No Description Size Qty 79 .............. 5713381 .................... Screw....................................................................... 1/4" x 3/8"...................... 4 80 .............. J-5713391G .............. Blade Wheel Cover .................................................. ...................................... 1 80-1 ........... JET-203..................... JET Logo ..............................................................
Index No Part No Description Size Qty 115 ............ 5713761 .................... Washer .................................................................... 1/2"................................ 1 116 ............ 5713771 .................... Washer .................................................................... 5/16".............................. 2 118 ............ 5713781 .................... Screw....................................................................... M16 x 30 .................
Index No Part No Description Size Qty 160 ............ 5714241 .................... Blade Wheel Shaft ................................................... ...................................... 1 161 ............ 5714251G ................. Threaded Nut ........................................................... ...................................... 1 161-1 ......... 5519690 .................... Pan Head Screw...................................................... M6x12 ...........................
15.0 Electrical Connections 15.
15.
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427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jetttools.
