Pneumatic 4” Angle Grinder #505434, JAT-434 Operation & Parts Manual M-505434 Edition 1 05/2019 JET 427 New Sanford Road LaVergne, TN 37086 Ph.: 800-274-6848 www.jettools.
IMPORTANT SAFETY INSTRUCTIONS General air tool warnings 1. Read and understand this entire manual before attempting assembly or operation. 2. Read and understand all warnings posted on the tool and in this manual. Failure to comply with all of these warnings may cause serious injury. 3. Replace warning labels if they become obscured or removed. 4. Do not use this tool for other than its intended use.
24. Keep visitors a safe distance from the work area. Keep children away. 25. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are careless acts that can result in serious injury. 26. Do not force a tool or attachment to do a job for which it was not designed. The right tool will do the job better and more safely. 27. Repetitive motions and/or exposure to constant vibration can be harmful to hands and arms.
About this manual This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model JAT-434 Pneumatic Angle Grinder. This manual contains instructions on safety precautions, general operating procedures, maintenance procedures and parts breakdown. Your tool has been designed and constructed to provide consistent, long-term operation if used in accordance with the instructions set forth in this document.
Tool specifications Model JAT-434, Angle Grinder Stock number 505434 Wheel size (Dia x Bore x Thk) 4 x 5/8 x 1/4 in. (101.6 x 15.88 x 6.35mm) Wheel type Type 27 Spindle thread 3/8in.–24UNF Horsepower 0.9 Free speed 12,000 RPM Air consumption – free speed 17.6 SCFM / 2.5CFM at 90psi Air consumption – under load 20 SCFM / 2.8CFM at 90psi Air Inlet 1/4 in. NPT Air Hose inside diameter 3/8 in. Required air pressure 90 psi (6.2 bar) Vibration value 6.
Setup and Assembly Any missing parts or damage should be reported immediately to your JET® distributor. Do not use a damaged tool. Read this instruction manual thoroughly for operation, maintenance and safety instructions. Box contents: 1 1 1 1 1 1 Angle grinder Pin wrench Open end wrench Side handle Operation and parts manual Product registration card Operation Figure 2 5. The angle grinder must be properly lubricated before operation. See “Lubrication” section. Figure 1 1.
Maintenance Excess air pressure and/or unclean air will shorten the tool’s life and may create a hazardous situation. Lubrication The grinder should be lubricated daily (or before each use) with air tool oil through the air inlet. During continual operation, it should be re-oiled every 1 to 2 hours. This can be done with an inline oiler, or manually. If done manually, proceed as follows: 1. Disconnect air hose from tool. 2. Place 4 or 5 drops of air tool oil into air inlet.
Air System Recommendations Lubrication Equip the air compressor intake with a replaceable air filter that can be easily cleaned. Use a light oil containing rust inhibitors, such as SAE #10. Many JET air tools have integral oil reservoirs, which should be kept filled when in-line oilers are not used. Use safety shut-off valves so air flow can be stopped quickly in case of a line break. When using multiple hoses, air hoses should be larger than leader hose.
Troubleshooting JAT-434 Angle Grinder Any disassembly of the tool should be done by qualified service personnel. For problems not addressed below, contact JET technical service at 800-274-6846. Problem Tool will not start. Possible cause Remedy Air valve closed or obstructed. Open valve; clear any obstructions. Dirt or gum deposits on components. Flush tool with gum solvent. If problem persists, disassemble, clean and lubricate internal parts. Rotor vanes or other components are worn.
Replacement parts To order parts or reach our service department, call 1-800-274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Please have the stock number and serial number of your tool available when you call, so that we may serve you quickly and accurately. Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET. Some parts are shown for reference only, and may not be available individually.
#505434, JAT-434, 4-inch Angle Grinder – parts list # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Part No.
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.
