Introduction of testing machine

Measures tightening characteristics during screw tightening, and it can check fastening axial force, tightening torque, threaded-section torque, tightening rotation angle, and elongation. (Based on JIS B 1084) Our company has 3 threaded fastener tightening characteristic testing machines that are compatible with a wide range of sizes.

Purpose

Investigation of threaded fastener tightening characteristics

Test Details

In this test, the tightening torque is applied to the sample nut and bolt to generate tightening force, and tightening characteristic values such as torque coefficient, overall friction coefficient, thread-surface friction coefficient, seat-surface friction coefficient, yield fastening axial force, yield tightening torque, tightening rotation angle and maximum fastening axial force are measured.

Compatible Sizes

NST-100NM・・・M3-M6
NST-1000NM・・・M8-M24
NST-3000NM・・・M30-M75