This .pdf document is bookmarked Operating Instructions and Parts Manual 2 x 72-inch Square Wheel Belt Grinder Model SWG-272, SWG-272VS Single speed model Variable speed model shown with platen assembly JET 427 New Sanford Road LaVergne, Tennessee 37086 Ph.: 800-274-6848 www.jettools.com Part No.
1.0 IMPORTANT SAFETY INSTRUCTIONS - Misuse of this machine can cause serious injury. - For safety, machine must be set up, used and serviced properly. - Read, understand and follow instructions in the operator’s manual and all labels affixed to the machine. 4. Keep guards in place and in proper working order. Do not operate the machine with the guards removed. 5. Avoid dangerous working environments. Do not use stationary machine tools in wet or damp locations. Keep work areas clean and well lit. 6.
1.2 Safety requirements for abrasive grinding machines 9. Never use an abrasive which shows backing, nicks or cuts on the surface or edge or damage due to creasing or poor handling. Abrasive grinding can be hazardous to operators and bystanders. Grinding sparks, chips and dust particles thrown off by the grinding disc or belt can cause serious injury by contact or inhalation. To avoid such injuries you must comply with the following safety requirements: 10.
2.0 About this machine and manual The JET SWG-series Square Wheel Belt Grinders are designed for grinding, deburring, chamfering, and internal/external grinding of small and large parts. The Grinders can be used to polish or buff finished parts and grind small internal radii using available accessories. Accessory changeover is quick and easy. Belt tension and tracking are easily adjustable.
3.0 Table of contents Section Page 1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2 1.1 Machinery general safety warnings ............................................................................................................ 2 1.2 Safety requirements for abrasive grinding machines ................................................................................. 3 2.0 About this machine and manual .............
4.0 Specifications for SWG-series Grinders Table 1 Model number Stock number Motor and Electricals Motor type Horsepower Motor phase Motor voltage Cycle Listed FLA (full load amps) Motor speed Start capacitor Run capacitor Power transfer On/off switch Power cord Power plug Recommended circuit size 1 Sound emission 2 Base Footprint, L x W Mounting hole dimensions Belt Grinder Belt included, L x W Belt speed, SFPM Contact wheels included, Dia.
1 subject to local/national electrical codes. 2 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, Dia.
5.1 Location Read and understand all assembly instructions before attempting assembly. Failure to comply may cause serious injury. It is strongly recommended that the machine be secured to a bench or stand. The base has multiple holes (some are accessed behind the side panel) to accept fasteners for this purpose. Sect. 4.1 shows the hole patterns. Note: Some illustrations in this manual may be representative only, and not show your specific model. An optional JET stand is available for this machine.
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. 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. 6.
6.2.2 Variable speed model (SWG-272VS) 1. 5. Remove existing plug from power cable and attach a UL/CSA listed plug designed for 230V power; or “hardwire” the machine directly to a panel. If hardwiring make sure a disconnect is provided for the operator. No internal rewiring is needed for the inverter to accept the new input voltage. 6.3 Extension cords The use of extension cords is discouraged; try to position your machine within reach of the power supply.
5. Raise belt tension lever to tighten belt against the wheels. Tighten belt until it is just taut. Do not over-tension the abrasive belt. A moderate tension will provide faster cutting, longer belt life, and better tracking. Excessive belt tension will reduce belt life and cause excessive wear of contact wheel bearings. Belt tension should only be sufficient to allow proper tracking. 6. Check belt tracking; see sect. 7.4. Figure 7-3: Belt tracking 8.0 Operation 8.1 Controls 8.1.
8.1.2 Single speed model (SWG-272) See Figure 8-2. Pull the red “mushroom” switch outward to start machine. The green light will illuminate. Push back in to stop machine; green light will turn off. To prevent accidental or unauthorized operation, stop the machine and pull out the yellow safety key. The key must be reinserted to start the machine. (Push key all the way in until a “snap” sound is heard.) Figure 8-2: standard control 8.
9.0 User-maintenance Always disconnect power to machine before performing maintenance. Failure to comply may result in serious personal injury. 7. Install bearings in new contact wheel. 8. Install shaft and secure with retaining ring. 9. Mount new contact wheel to machine. Refer to sect. 7-1 for instructions on completing the installation. 9.1 Cleaning Shut off machine and disconnect before cleaning. Keep machine exterior clean and free of chips.
11.0 Troubleshooting SWG-series Square Wheel Grinders Table 2 * WARNING: Some corrections may require a qualified electrician. Symptom Machine won’t start. Possible Cause Correction * No incoming power. Verify machine connections. Cord damaged. Replace cord. Building circuit breaker trips or fuse blows. Verify that machine is on a circuit of correct size, preferably a dedicated circuit. If circuit size is correct, there may be a loose electrical lead. Motor overloaded.
12.1.
12.1.2 SWG-272 Square Wheel Belt Grinder – Parts List Index No Part No Description Size Qty 1 ................ SWG272-01 .............. Main Frame ............................................................. ...................................... 1 2 ................ SWG272-02 .............. Guard Flap ............................................................... ...................................... 1 3 ................ SWG272-03 .............. Door .................................................
12.2.1 SWG-272 Motor Assembly – Parts List and Exploded View Index No Part No Description Size Qty 33-1 ........... SWG272-331 ............ End Cover ................................................................ ...................................... 1 33-2 ........... BB-6205ZZ ................ Ball Bearing ............................................................. 6205ZZ ......................... 1 33-3 ........... SWG272-333 ............ Shaft w/ Rotor ..........................................
12.3.1 SWG-272 Push Button Switch Assembly – Parts List and Exploded View Index No Part No Description Size Qty 38-1 ........... SWG272-381 ............ Switch Bracket ......................................................... ...................................... 1 38-2 ........... SWG272-382 ............ Switch Box ............................................................... ...................................... 1 38-3 ........... SWG272-383 ............ Strain Relief .............................
12.4.
12.4.2 SWG-272VS Square Wheel Belt Grinder – Parts List Index No Part No Description Size Qty 1 ................ SWG272-01 .............. Main Frame ............................................................. ...................................... 1 2 ................ SWG272-02 .............. Guard Flap ............................................................... ...................................... 1 3 ................ SWG272-03 .............. Door ...............................................
12.5 SWG-272VS Motor Assembly – Parts List and Exploded View Index No Part No Description Size Qty 33-1 ........... SWG272-331 ............ End Cover ................................................................ ...................................... 1 33-2 ........... BB-6205ZZ ................ Ball Bearing ............................................................. 6205ZZ ......................... 1 33-3 ........... SWG272VS-333........ Shaft w/ Rotor .............................................
12.6 SWG-272VS Control Switch Assembly – Parts List and Exploded View Index No Part No Description Size Qty 38-1 ........... SWG272VS-381........ Switch Bracket ......................................................... ...................................... 1 38-2 ........... SWG272VS-382........ Control Box .............................................................. ...................................... 1 38-3 ........... SWG272VS-383........ Nylon Nut ..............................................
12.7 Idler Housing Casting Assembly (all models) – Parts List and Exploded View Index No Part No Description Size Qty 4-1 ............. SWG272-401 ............ Idler Housing Casting .............................................. ...................................... 1 4-2 ............. SWG272-402 ............ Tension Lever .......................................................... ...................................... 1 4-3 ............. SWG272-403 ............ Nylon Tipped Set Screw .................
12.8 Platen Assembly (all models) – Parts List and Exploded View Index No Part No Description Size Qty 5-1 ............. SWG272-501 ............ Platen ...................................................................... ...................................... 1 5-2 ............. F010725 .................... Socket HD Flat Screw ............................................. 5/16-18 x 5/8 ................. 2 5-3 ............. SWG272-503 ............ Contact Wheel Shaft ..................................
12.9 Contact Wheel Assembly (all models) – Parts List and Exploded View Index No Part No Description Size Qty 6-1 ............. SWG272-601 ............ Contact Wheel ......................................................... 8”x2” Serrated,90Duro .. 1 6-2 ............. SWG272-602 ............ Shaft ........................................................................ ...................................... 1 6-3 ............. BB-6203VV ............... Ball Bearing ......................................
12.10 Dust Hood Assembly (all models) – Parts List and Exploded View Index No Part No Description Size Qty 40-1 ........... SWG272-4001 .......... Rail .......................................................................... ...................................... 1 40-2 ........... SWG272-4002 .......... Channel ................................................................... ...................................... 1 40-3 ........... SWG272-4003 .......... Scoop .....................................
13.0 Electrical Connections 13.1 Wiring diagram for SWG-272 13.
14.0 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.
