This .pdf document is bookmarked Operating Instructions and Parts Manual JBG-W Series Grinder with Wire Wheel Models JBG-6W, JBG-8W 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.
7. Do not overtighten wheel nut. 26. Use recommended accessories. The use of improper accessories may cause risk of injury to persons. 38. Frequently clean grinding dust from around and beneath grinder. 27. Turn off the machine before cleaning. Use a brush to remove chips or debris — do not use bare hands. 39. Use grinding wheels suitable for speed of grinder. 28. Never leave the grinder running unattended. Turn power off and do not leave machine until wheels come to a complete stop. 40.
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 JBGW series Bench Grinder with Wire Wheel. 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 JBG-6W, JBG-8W Bench Grinders 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 577126 JBG-6W induction, capacitor start, centrifugal switch 1/2 HP 1 HP single 115 V 60 Hz 5.0 A 8.
Weights Net weight (approx.) Shipping weight (approx.) 32 lb. (14.40 kg) 35 lb. (15.85 kg) 54 lb. (24.56 kg) 58 lb. (26.50 kg) 1 subject to local and national electrical codes. 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 2 O.D.
5.0 Setup and assembly Chipped or cracked wheels can break up and cause serious damage to grinder and/or severe injury to operator. Regularly inspect wheels for damage. 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.
5.4 Securing the grinder wears down, the spark guard must be readjusted to maintain this 1/16" distance. To prevent the grinder from moving during operation, it should be securely mounted to a work surface or grinder stand. Fasteners for mounting are not included with the grinder. 1. 2. 3. 5.7 Eye shield Align the mounting holes on grinder with predrilled holes in a bench or grinder stand. Figure 4-1 shows hole centers for mounting. Refer to Figure 5-3.
5.9 Dust port Check with a qualified electrician or service personnel if the grounding instructions are not completely understood, or if in doubt as to whether the tool is properly grounded. Failure to comply may cause serious or fatal injury. It is recommended that a metalworking dust collection system be connected to the grinder’s dust port, using a 2-in. diameter hose with hose clamp (not provided). 6.
will help prevent a groove from forming at one place on the wheel. 7.0 Operation Always use approved safety glasses or face shield. Failure to comply may cause serious injury. A bench grinder is designed for hand-grinding operations such as sharpening chisels, screwdrivers, drill bits, removing excess metal, and smoothing and polishing metal surfaces.
8.3 Tool Rest Wheel Diameter Maximum Width Center Hole JBG-6W 6" 3/4" 1/2" JBG-8W 8" 1" 5/8" Model As the wheel wears down, the tool rest must be readjusted to maintain a maximum 1/16" distance. Refer to Figure 8-1. 1. Loosen two hex cap screws (C1). 2. Slide tool rest (C2) to within 1/16" from grinding wheel. 3. Table 3 Your bench grinder will accept most polishing and buffing wheels available at dealers and hardware stores. Tighten screws (C1). 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. Do not overtighten nut; this may cause wheel to crack.
9.6 Cleaning Metal shavings may still be hot from recent grinding operations. Make sure shavings and debris are cold before cleaning the grinder. 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. Figure 9-3: wheel dressing 9.
10.0 Troubleshooting JBG-6W, JBG-8W Bench Grinders Table 4 Symptom Motor will not start. Motor will not start; fuses blow or circuit breakers trip. Possible Cause Correction * Not connected to power source. Motor cord cut or abraded. Verify that switch is on and plug is properly inserted into receptacle. Replace with new cord. Wheels cannot rotate because of obstruction. Plug on cord is faulty. Unplug and turn grinding wheel by hand to ensure free movement. Restart. Replace with new plug.
Symptom Frequent fuse or circuit breaker failure. Possible Cause Correction * Motor overload. Electrical circuit overload; too many machines running on same circuit. Incorrect fuse or circuit breaker. Excessive vibration. Wheel(s) out of balance; wobbling or not rotating concentric to arbor. Improper mounting. * WARNING: Some corrections may required a qualified electrician. 16 Reduce load on motor; do not press so hard when grinding. Turn off other machines and try again.
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. IBG8-54 Wheel Dresser, Ø 1-1/4” 578172 Stand for Grinders 578173 Deluxe Stand for Grinders The following accessories are for using the Grinder with the JET #414800 (JDCS-505) Dust Collection Stand: 414820 Reducer, 3 in. to 2 in. 414812 0.6M Hose, Heat Resistant, ø2 x 24.4 in. 12.
12.1.
12.1.2 JBG-6W, JBG-8W Grinders – 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 44 .............. JBG6A-44.................. Rocker Switch .......................................................... ...................................... 1 .................. JBG8A-44.................. Toggle Switch .......................................................... ...................................... 1 45 .............. JBG6A-45.................. Switch Plate ............................................................. ...............................
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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.
