Proto J6349 Digital Torque Wrench 1 Inch Drive

Product Description

The PROTO J6349 is a digital torque wrench with a 1 inch square drive, built for high-torque fastening applications in industrial, heavy equipment, and fleet maintenance environments. It delivers a torque range of 133 to 1335 Newton-meters (Nm), equivalent to 100 to 984 foot-pounds, with a 1 Nm graduation for repeatable, precise readings. The fixed head design keeps the drive geometry consistent during use. At 77 inches overall length and 33.11 pounds, this is a full-size production tool intended for use on large-diameter fasteners where accuracy and auditability matter.

This wrench is suited for torque-critical assembly and maintenance work on heavy machinery, truck and trailer axle components, large flange bolting, and industrial equipment. The digital readout supports applications where technicians need to verify and record applied torque values. It is typically used by heavy equipment mechanics, diesel techs, and industrial maintenance professionals working to manufacturer torque specifications.

Key Features

• Torque range: 133 to 1335 Nm (100 to 984 ft-lb)
• 1 Nm graduation for precise, repeatable torque application
• 1 inch square drive handles high-torque fasteners
• Fixed head design for consistent drive alignment
• Digital readout supports torque verification and documentation
• 77 inch overall length provides leverage for large fastener applications

Compatibility

Designed as a direct-fit production torque wrench for use with standard 1 inch square drive sockets and accessories in industrial and heavy-duty maintenance applications.

Installation Notes

Installation and service use of this wrench should follow the applicable torque specifications provided by the equipment or fastener manufacturer. Ensure the drive and socket connection are fully seated before applying load. Do not use extension bars or cheater pipes unless the tool is rated for the resulting torque increase. Calibration should be verified periodically per your facility or shop quality procedures.