Extension Spring Tension Tester with Initial Tension Measurement

Bench tester for extension springs measuring initial tension, load at length and spring rate. Used in appliance, automotive and garage-door spring production. Wire diameters from fine to heavy gauge can be checked against drawing limits.

Specification

Hooks grip both ends of the spring while a motor-driven crosshead extends it to preset lengths. Initial tension is found by extrapolating the load-deflection line to zero length as required by spring standards.

Features

• Hook fixtures for various loop types
• Automatic initial tension calculation
• Adjustable extension limit switch
• Digital display of load and length
• Stepless speed control

Technical Specifications

Capacity	1000 N
Resolution	0.1 N
Accuracy	+/-0.5% of reading
Max extension	300 mm
Length resolution	0.01 mm
Wire diameter range	0.3 to 6 mm
Power	230 V AC, 50 Hz
Standards	IS 7906 Part 2, DIN EN 13906-2

Standard Accessories

• Hook set
• Open-end hook
• Calibration check weight