Proto J6478 Electronic Torque Tester 720-7200 In/lb

Product Description

The PROTO J6478 is an electronic torque tester designed to measure and verify torque output across a range of 720 to 7,200 inch-pounds (60 to 600 foot-pounds). It delivers plus or minus 1% accuracy, making it suitable for calibration checks, tool certification, and quality control applications in maintenance and production environments. The unit accepts a 3/4 inch drive and functions as both a torque meter and a calibrator. Technicians use it to validate torque wrenches, pneumatic tools, and electric fastening tools before or during service. The tester weighs 7.89 pounds and is designed for bench or field use by industrial mechanics, tool room technicians, and service professionals who need reliable torque verification.

The J6478 is appropriate for commercial and industrial settings where torque tool calibration is part of standard maintenance protocol. It covers a wide span from low-end torque verification at 720 in/lb up to high-output tool testing at 7,200 in/lb, making it versatile across multiple tool types and fastening applications. The 3/4 inch drive interface accommodates a broad range of drive adapters, expanding compatibility with various torque wrenches and powered tools commonly found in HVAC, mechanical, and general industrial service work.

Key Features

• Torque range of 720 to 7,200 in/lb (60 to 600 ft/lb) covers a wide variety of tool types
• Plus or minus 1% accuracy supports calibration and certification workflows
• 3/4 inch drive interface accommodates standard adapters and extensions
• Functions as both a torque meter and a calibrator in a single unit
• Electronic readout provides repeatable, consistent measurements

Compatibility

Designed as a calibration and verification instrument compatible with 3/4 inch drive torque wrenches, pneumatic torque tools, and electric fastening tools producing output within the 720 to 7,200 in/lb range.

Installation Notes

Torque testers should be used on a stable, level surface or mounted securely before applying tool load. Power down or de-energize any electrically driven torque tool before connecting it to the tester drive interface. Follow the tool and tester manufacturer guidelines for warm-up cycles and zero calibration before recording measurements. Periodic recalibration of the tester itself should be performed in accordance with your facility quality program or applicable metrology standards.