Pneumatic Die Grinder #505401, JAT-401 #505402, JAT-402 JAT‐402 JAT‐401 Operation & Parts Manual M-505401 Edition 1 02/2015 JET 427 New Sanford Road LaVergne, TN 37086 Ph.: 800-274-6848 www.jettools.
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.
Safety warnings 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.
20. Do not use power tools in damp or wet location, or expose them to rain. Keep work area well lighted. 21. Do not leave a connected tool unattended. When not in use, disconnect tool from air source. 22. Shut off air supply and discharge any residual pressure from tool before removing hose, making adjustments, changing accessories, or storing tool. 23. Make sure tool is switched off, and your finger off the trigger, before connecting to air supply. 24.
About this manual This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model JAT-401 and JAT-402 Pneumatic Die 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 number JAT-401 JAT-402 Stock number 505401 505402 Collet size 1/4 in. 1/4 in. Horsepower 0.5 0.5 Free speed 23,000 RPM 23,000 RPM Average air consumption 4 CFM 4 CFM Air inlet 1/4 in. NPT 1/4 in. NPT Air hose inside diameter 3/8 in. 3/8 in. Required air pressure 90 psi (621 kPa) 90 psi (621 kPa) Vibration value 2.2 m/s2 2.2 m/s2 103 dB(A) 103 dB(A) variable variable Noise level 1 Speed setting Grip Inline Inline Overall Length 6-3/4 in. (171.
IMPORTANT: Connecting a quick-change coupling directly to the tool is not recommended, as vibration may cause the connection to fail. Instead, add a leader hose and install any quick-change couplings farther down the line. 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. 5.
Air system requirements Tool Pressure 1. Use proper air hose size (refer to tool specifications). The hose should be just long enough to serve the working area. Excessive hose length will cause pressure drop. 1. Make sure air compressor supplies clean, dry air at correct CFM for the tool. JET Air Tools operate on 70-to-100 psi (pounds per square inch) air pressure measured at the tool when the tool is operating. Set tool to 90 psi unless indicated otherwise.
Figure 2 Recommended arrangement of air piping and air line system JET 9
Troubleshooting JAT-401/402 Die Grinders 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 Possible cause Remedy Tool will not start. 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 Service parts are listed on the following pages. To order parts or reach our service department, call 1-800274-6848 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.
#505401, JAT-401, 1/4-inch Die Grinder – exploded view 12 JAT-401,402 Die Grinders
#505401, JAT-401, 1/4-inch Die Grinder – parts list Index 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Part No. JAT401-01 SM-30102 51203 51504 51205 51206 70107 51208 70123 51210 40305 51212 BB-626ZZ 51214 51215 51216 70117 Description Motor housing Spring pin ø3x24L Air inlet Throttle lever Valve stem Exhaust diffuser O-Ring 4.8x1.9 Valve spring O-Ring 11.8x2.4 Throttle valve plug O-Ring ø6.
#505402, JAT-402, 1/4-inch Extended Die Grinder – exploded view 14 JAT-401,402 Die Grinders
#505402, JAT-402, 1/4-inch Extended Die Grinder – parts list Index 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Part No. JAT401-01 SM-30102 51203 51504 51205 51206 70107 51208 70123 51210 40305 51212 BB-626ZZ 51214 51215 51216 70117 Description Motor housing Spring pin ø3x24L Air inlet Throttle lever Valve stem Exhaust diffuser O-Ring 4.8x1.9 Valve spring O-Ring 11.8x2.4 Throttle valve plug O-Ring ø6.
427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.
