This .pdf document is bookmarked Operating Instructions and Parts Manual Bench Grinder with Multitool Attachment Models JBGM-6, JBGM-8 JET 427 New Sanford Road LaVergne, Tennessee 37086 Ph.: 800-274-6848 www.jettools.com Part No.
11. This product, when used for welding, cutting, or working with metal, produces fumes, gases, or dusts which contain chemicals known to the State of California to cause birth defects and, in some cases, cancer. (California Health and Safety Code Section 25249.5 et seq.) 1.0 IMPORTANT SAFETY INSTRUCTIONS 12. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication. WARNING – To reduce risk of injury: 1.
26. Use recommended accessories. The use of improper accessories may cause risk of injury to persons. 35. Never stand on tool. Serious injury could occur if the tool is tipped or if the cutting tool is unintentionally contacted. 27. Turn off the machine before cleaning. Use a brush to remove chips or debris — do not use bare hands. 36. Direction of feed. Feed work into a blade or cutter against the direction of rotation of the blade or cutter only. 28. Never leave the grinder running unattended.
2.0 Table of contents Section Page 1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2 2.0 Table of contents ............................................................................................................................................ 4 3.0 About this manual .......................................................................................................................................... 5 4.
3.0 About this manual This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model JBGM series Bench Grinder with Multitool Attachment. This manual contains instructions on installation, safety precautions, general operating procedures, maintenance instructions and parts breakdown. This tool has been designed and constructed to provide consistent, long-term operation if used in accordance with the instructions set forth in this document.
4.0 Specifications for JBGM-series Grinders w/Multitool Table 1 Stock number Model number Motor and Electricals Motor type Horsepower Phase Voltage Cycle Listed FLA (full load amps) Start capacitor Motor speed On/off switch 577109 JBGM-6 induction, capacitor start, centrifugal switch 1/2 HP 1 HP single 115 V 60 Hz 5.0 A 8.
General dimensions Footprint WxD Overall dimensions, assembled (approx., with belt in horizontal position) LxWxH Shipping dimensions (approx.) LxWxH 5-1/2 x 7-1/2 in. (140 x 190 mm) 18 x 18 x 10-1/2 in. (457 x 457 x 267 mm) 20-1/2 x 21 x 13 in. (521 x 535 x 330 mm) 6-1/4 x 8-1/2 in. (159 x 216 mm) 19 x 19 x 12-1/2 in. (483 x 483 x 318 mm) 20-1/2 x 21 x 13 in. (521 x 535 x 330 mm) 37 lb. (17 kg) 47 lb. (21 kg) 52 lb. (24 kg) 62 lb.
5.0 Setup and assembly 5.1 Unpacking Separate all parts from the packing material. Check each part against sect. 5.2, Carton contents, and make certain that all items are accounted for. (Check grinder first to verify if any parts have been pre-mounted.) Notify your dealer or JET if parts are missing or there is shipping damage. Do not discard any packing material until grinder is assembled and operating properly. 5.2 Carton contents Refer to Figure 5-1.
Figure 5-2: bracket to spark guard 5.6 Installing spark guard/bracket Refer to Figure 5-3. 1. Install spark guard and mounting bracket assembly to the left wheel housing with two 3/8 x 1/2” hex cap screws (G) and two 3/8" flat washers (J). 2. The spark guard (A1) should be adjusted to within 1/16" of the grinding wheel surface or other accessory being used. As the wheel wears down, the spark guard must be readjusted to maintain this 1/16" distance. Figure 5-3: guard and tool rest 5.7 Eye shield 5.
5.11 Installing/replacing abrasives See Figure 5-5. Disc: Clean disc surface of aluminum drive wheel. If replacing an abrasive, clean old adhesive from drive wheel with a solvent. Peel off backing and apply new abrasive (A), centering it on drive wheel. Figure 6-1: plug configuration Belt: Push contact wheel backward (B) and engage catch (C) to lock in place. Install belt, making sure directional arrows printed on back of belt match direction of belt movement. Pull catch (C) upward to tension belt. 6.
6.2 Extension cords • The use of extension cords is discouraged. Try to position equipment near the power source. If an extension cord becomes necessary, use only threewire extension cords that have three-prong grounding type plugs and three-prong receptacles that accept the tool's plug. Replace or repair damaged or worn cord immediately. Contact wheel – Grinding, polishing and sanding against belt and contact wheel offers smooth sanding, removing material more rapidly than conventional grinding wheels.
9. 8.3 Tool Rest When wheel becomes loaded or dull, use an approved grinding wheel dresser and dress the wheel face. As the wheel wears down, the tool rest must be readjusted to maintain a maximum 1/16" distance. 7.2.2 Belt and Disc grinding Refer to Figure 8-1. 1. Remove belt before grinding on disc, to prevent accidental contact of hands with belt. 1. Loosen two hex cap screws (C1) with 14mm wrench. 2. Always grind on downward side of disc.
3 to determine correct replacement wheel. dimensions for the Wheel Diameter Maximum Width Center Hole JBGM-6 6" 3/4" 1/2" JBGM-8 8" 1" 5/8" Model Table 3 Your bench grinder will accept most polishing and buffing wheels available at dealers and hardware stores. Figure 8-3: platen adjustment 9.
8. Inspect the new grinding wheel and perform a “ring test” (sect. 9.1). Do not install a damaged wheel. 9. Install inner flange, wheel (E), outer flange (D) and nut (C) on the shaft. Tighten nut. Then rotate inner flange about 90° and repeat the above steps for outer flange. 4. Continue this combination of flange movements until the wobble is eliminated. If required, a shim made of paper or card stock may be placed between flange and wheel side. Do not overtighten nut; this may cause wheel to crack.
Avoid use of the following cleaning chemicals or solvents: gasoline, carbon tetrachloride, chlorinated solvents, ammonia and household detergents containing ammonia. Brush all shavings from motor housing, tool rest, and wheel guard. Check grinding wheel for cracks and chips. Replace if damaged. Periodically use a cleaning stick (not provided) against abrasive belt and abrasive disc to remove build-up. If the abrasive belt becomes loaded, it can be cleaned in a solvent.
10.0 Troubleshooting JBGM-series Grinder with Multitool Table 4 Symptom Possible Cause Correction * Motor will not start. Not connected to power source. Verify that plug is properly inserted into receptacle. Motor cord cut or abraded. Replace with new cord. Wheels cannot rotate because of obstruction. Unplug and turn grinding wheel by hand to ensure free movement. Restart. Plug on cord is faulty. Replace with new plug. Low line voltage. Check power line for proper voltage.
Symptom Possible Cause Correction * Motor slows. (cont.) Loose connections. Inspect connections. Frequent fuse or circuit breaker failure. Motor overload. Reduce load on motor; do not press so hard when grinding. Electrical circuit overload; too many machines running on same circuit. Turn off other machines and try again. Incorrect fuse or circuit breaker. Have electrician upgrade service to outlet. Wheel(s) out of balance; wobbling or not rotating concentric to arbor.
11.0 Optional accessories These accessory items, purchased separately, are available for your JET bench grinder. Contact your dealer to order, or call JET at the phone number on the cover.
12.1.
12.1.2 JBGM-series Grinder with Multitool Attachment – Parts List Index No Part No Description Size Qty 1 ................ JBG6A-02P ............... Shaft and Rotor Assembly ....................................... ...................................... 1 .................. JBG8A-02P ............... Shaft and Rotor Assembly ....................................... ...................................... 1 3 ................ JBG6A-03.................. Stator Assembly.........................................
Index No Part No Description Size Qty 50 .............. JBG6A-50.................. Eye Shield Plate - left. ............................................. ...................................... 1 .................. JBG8A-50.................. Eye Shield Plate - left. ............................................. ...................................... 1 52 .............. TS-0720071 .............. Lock Washer ............................................................ 1/4"................................
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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.
427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.