Click torque wrench HAZET 5121-3CT

The HAZET 5121-3CT is a mechanical click torque wrench with a reversible ratchet and a 1/2" (12.5 mm) square drive. With a total length of 421 mm and a laser-marked scale, it provides precise torque setting and permanent readability. The tool is designed for demanding workshop use and delivered in a sturdy Hexa plastic box with calibration certificate and serial number. It complies with DIN EN ISO 6789-2:2017 and is made in Germany.

Advantages

The reversible ratchet offers safe torque release that is both palpable (close gap release) and audible (click sound). Accuracy is ±3% of scale value in the direction of actuation (model 5107-3 CT has ±4% release tolerance). The wrench includes an optimised sealing ring to protect against debris, a ratchet repair set for customer self-assembly, and a handle with slip protection for improved grip. An adjustment aid with detent points and a latching locking function secure the selected torque value. The triangular rotary assembly prevents uncontrolled rolling and provides openings for cable-loop attachment. Integrated shift lever models (5121-3 CT – 5145-3 CT) include a free-running function to reduce risk of injury and malfunction. Long-term tests on related HAZET series indicate no need to return the wrench to the smallest scale value after use.

Suitable for

• Tire service and bicycle maintenance
• Passenger car and commercial vehicle fastening tasks
• Controlled screw tightening in trade and industry

Key specifications

• Model: HAZET 5121-3CT
• Drive: 1/2" square (12.5 mm) solid output
• Total length: 421 mm
• Accuracy: ±3% of scale value (direction of actuation)
• Standards: DIN EN ISO 6789-2:2017; square according to DIN 3120, ISO 1174-1
• Delivery: calibration certificate and serial number in Hexa plastic box
• Origin: Made in Germany

How to use

Set the desired torque by turning the handle until the detent points align with the scale and the rotary assembly latches the value. Attach the appropriate socket to the 1/2" square drive and position the wrench on the fastener. Apply steady force in the direction of actuation until an audible and palpable click indicates the set torque has been reached. If fitted, use the integrated shift lever and free-running function as needed to change ratchet direction or to engage free-run mode. After use, store the wrench in its Hexa plastic box to protect the tool and preserve calibration.

Usage recommendations

Have the torque wrench recalibrated periodically according to usage frequency and workplace requirements; follow the calibration certificate schedule and the manufacturer’s instructions to ensure continued accuracy and safe operation.