This .pdf document is bookmarked Operating Instructions and Parts Manual Disc, Belt and Combination Disc/Belt Sanders Models: J-4200A J-4200A-2 J-4202A J-4200A Disc/Belt Sander JET 427 New Sanford Road LaVergne, Tennessee 37086 Ph.: 800-274-6848 www.jettools.com J-4300A J-4301A J-4400A J-4401A J-4300A Belt Sander J-4400A Disc Sander 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. other hazardous properties. You should always consult the manufacturer of such materials for instructions on sanding and handling. 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. Do not force or jam the workpiece into the sanding disc. 5.
4.0 Machine and Manual Overview JET Abrasive Finishing Machines are available in three different configurations: disc, belt, and combination disc and belt. Each configuration is a rugged, heavy-duty machine designed for maximum high production work in an industrial environment. The speed of stock removal and the quality of finish achieved is determined largely by the aggressiveness of the abrasive disc or belt mounted on the machine.
5.0 Specifications Model Stock No. J-4200A J-4200A-2 J-4202A J-4300A J-4301A J-4400A J-4401A 414551 414552 414553 414600 414601 414602 414603 Table size Table tilt Miter gauge groove Disc diameter Disc Speed (no load) Platen size Belt size Belt speed (no load) Dust port diameter Dimensions (depth, W, H) Dimensions w/platen vertical (depthxWxH) Dimensions w/platen Horizontal (depthxWxH) Motor options Sound emission (approx.
6.0 Operating instructions These sanders can be used to remove stock from a wide variety of machinable materials. Different materials require different grit types and grades to achieve the desired stock removal rate and surface finish. Please consult with your abrasive materials supplier for specific recommendations on the correct grit material and grade required for your specific needs. Figure 1: Locking handle for belt table When removing stock from soft materials (wood, plastic, etc.
To adjust to horizontal: 6.6 Use of the Miter Gauge 1. Unlock both lock bolts. 2. Move arm to horizontal until it contacts its stop. (See Figure 3.) 3. Tighten both lock bolts and replace arbor cover. The miter gauge can be used on either the disc or belt surfaces to sand accurate angles on workpieces. When using the gauge alone, you sand a single angle. However, by tilting the table and using the miter gauge in combination with the table tilt, it is possible to sand compound angles, as well.
7.0 Maintenance 7.1 Belt replacement 1. 2. Disconnect the power to the machine to prevent accidental start-ups. If the machine is plugged into an outlet, unplug it. If the machine is hardwired to a branch circuit with a junction box, remove the fuse or trip the circuit breaker to the branch. 6. Check the drums and platen for scoring or signs of wear which might require service or replacement. 7. Check the height of the platen with a straight edge.
2. Take the two keys off of the idler pin bracket, wipe off, and re-grease. 3. Reverse the above steps to make the machine ready for reinstallation of the belt according to the Belt replacement instructions. 7.3 Installing abrasive discs 1. Disconnect power to the machine to prevent accidental start-ups. 2. Peel off the old abrasive disc. 3. Clean the drive disc surface using naptha or a similar nonflammable solvent that will dry filmfree. 4.
Figure 13: Removing the guard and drive disc, together. 12. Slide the disc and guard back into position. 13. Reinstall the disc guard bolts underneath the table. 14. Position the drive disc so that it is no more than 1/16 inch away from the table, then tighten BOTH of the set screws by inserting the hex wrench through the hole in the disc guard casting. 15. Rotate the machine back onto its base and secure it with all four mounting bolts. 16. Install the belt over the bottom pulley. 17.
8.2 Disc table angle adjustment 1. Disconnect power to the machine to prevent accidental start-ups. 2. Loosen the table locking knobs on either end of the table. 3. Using a machinist's square against the table and disc, set the table at exactly 90° to the disc (See Figure 15). 4. Tighten the table locking knobs. 5. Check the pointer. If it is not exactly on the zero mark, loosen the pointer attaching screw, adjust the pointer, and retighten the screw. 6. Reconnect the power to the machine.
4. Move the measuring device to the opposite edge of the disc and measure the distance to the miter slot. 5. Adjust the table by loosening the four attachment screws under the table, then move the table until the distance between the miter slot and the disc is equal on both sides (See Figure 17). 6. Tighten the four attachment screws. 7. Reconnect the electrical power to the machine. 8.5 Belt table miter slot parallelism adjustment 1. Disconnect power to the machine to prevent accidental start-ups.
Figure 20: Location of adjustment (socket head) screws and pointer attachment screw for table angle adjustment. Figure 21: Locations of stop lugs and stop bracket for zero and 45° table positions. Figure 22: Method for adjusting height of platen above drive and idler drums. 8.7 Adjusting or replacing the platen 1. Disconnect the electrical power to the machine to prevent accidental start-ups. 2. Remove the top cover, side guard and belt as outlined in section 7.1, Belt replacement. 3.
machine connection is made and the time delay fuse or circuit breaker should be a value just slightly higher than the maximum load current draw. All electrical service work on your JET sander should be performed by a qualified, licensed electrician who is familiar with all safe standard electrical installation practices and all applicable electrical codes. This includes local electrical codes which may affect the connection and operation of the sander in your specific manufacturing operation. 9.
10.0 Troubleshooting Symptom Possible Cause Correction Motor will not run Voltage is too low. Check power supply for proper voltage. Branch circuit fuse is blown or circuit breaker is tripped. Motor is defective. Determine the reason for the blown fuse or tripped circuit breaker; then replace the fuse or reset the breaker. Check all personnel and machines on the branch to be certain someone has not shut down the branch for service.
11.0 Replacement parts Replacement parts are listed on the following pages. To order parts or reach our service department, call 1800-274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Having the Model Number and Serial Number of your machine available when you call will allow us to serve you quickly and accurately. 11.1.
11.1.2 Model J-4200A Belt and Disc Sander Assembly – Parts List Index No Part No Description Size Qty 1 ................ J-5508427G .............. Bracket..................................................................... ...................................... 1 2 ................ 5511833 .................... Square Nut .............................................................. M10 ............................... 1 3 ................ 5051081 .................... Spring ............................
Index No Part No Description Size Qty 63 .............. J-5508457G .............. Platen....................................................................... ...................................... 1 64 .............. TS-1514011 .............. Socket Head Flat Screw .......................................... M6x12 ........................... 2 65 .............. J-5051601AG ............ Side Guard .............................................................. ......................................
11.2.
11.2.2 Model J-4300A Belt Sander Assembly – Parts List Index No Part No Description Size Qty 1 ................ J-5508427G .............. Bracket..................................................................... ...................................... 1 2 ................ 5511833 .................... Square Nut .............................................................. M10 ............................... 1 3 ................ 5051081 .................... Spring .....................................
Index No Part No Description Size Qty 63 .............. J-5508457G .............. Platen....................................................................... ...................................... 1 64 .............. TS-1514011 .............. Socket Head Flat Screw .......................................... M6x12 ........................... 2 65 .............. J-5051601AG ............ Side Guard .............................................................. ......................................
11.3.
11.3.2 Model J-4400A Disc Sander Assembly – Parts List Index No Part No Description Size Qty 1 ................ J-5508438G .............. Bearing Housing ...................................................... ...................................... 1 2 ................ TS-1523011 .............. Socket Set Screw .................................................... M6x6 ............................. 2 3 ................ 5511725 .................... 4200 Arbor Pulley ........................................
11.4.
11.4.2 Base Assembly: Model J-4300A, 1 Phase – Parts List Index No Part No Description Size Qty 1 ................ J-5511743G .............. Enclosure ................................................................. ...................................... 1 2 ................ TS-1490031 .............. Hex Cap Screw ........................................................ M8x20 ........................... 7 3 ................ TS-1550061 .............. Flat Washer .........................................
11.5.
11.5.2 Base Assembly: Model J-4300A, 3 Phase – Parts List Index No Part No Description Size Qty 1 ................ 4202A-501G .............. Enclosure ................................................................. ...................................... 1 2 ................ TS-1490031 .............. Hex Cap Screw ........................................................ M8x20 ........................... 7 3 ................ TS-1550061 .............. Flat Washer .........................................
11.6.
11.6.2 Base Assembly: Model J-4200A & 4400A, 1 Phase – Parts List Index No Part No Description Size Qty 1 ................ AB605418G............... Enclosure ................................................................. ...................................... 1 2 ................ TS-1490031 .............. Hex Cap Screw ........................................................ M8x20 ........................... 7 3 ................ TS-1550061 .............. Flat Washer ..................................
11.7.
11.7.2 Base Assembly: Model J-4200A & 4400A, 3 Phase – Parts List Index No Part No Description Size Qty 1 ................ AB605419G............... Enclosure ................................................................. ...................................... 1 2 ................ TS-1490031 .............. Hex Cap Screw ........................................................ M8x20 ........................... 7 3 ................ TS-1550061 .............. Flat Washer ..................................
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427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.
