Run-On Torque:The torque required to turn a nut or bolt before it is completely seated to perform an axial tightening action on the bolt or spacing elements.
Self-locking torque:The torque necessary to turn a fastener with a self-locking feature on its mating threaded part when 100 percent of the locking feature is engaged, and the fastener is not down against the mating surface.
螺母螺纹完全安装至螺栓,且至少露出1.5个螺栓头螺纹
螺母没有与安装面贴合,并预留出测量所需的轴向距离
需要使用带有指针的力矩磅表,或者专用的电子计量仪器
注:对于自锁螺母,注意测试前要保证自锁装置完全与螺栓啮合。例如槽型螺母,或者带有塑料环的自锁螺母。
Do a check for the maximum locking torque for each nut:(a)Tighten the bolt until the self-locking device is fully engaged.
Do a check for the minimum breakaway torque for each nut:(a)Loosen the bolt with the WRENCH - TORQUE, DIAL TYPE.
螺纹直径
自锁功能
螺牙密度
参考资料:
空客AMM
CFM56 SPM
https://focus-bangla.com/differences-run-torque-breakaway-torque/
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