3 ms·

I've always read that lubricating the threads can cause over-tensioning of the bolt if you torque it to the (typically) unlubricated torque spec: https://www.e

I've always read that lubricating the threads can cause over-tensioning of the bolt if you torque it to the (typically) unlubricated torque spec: https://www.engineeringtoolbox.com/torque-lubrication-effects-d_1693.html https://www.engineeringtoolbox.com/torque-lubrication-effect... If you are measuring the bolt tension directly then it doesn't matter but torque is only a proxy for tension.

albrewer 5y ago
> lubricating the threads can cause over-tensioning of the bolt if you torque it to the (typically) unlubricated torque spec This is correct. My main exposure to it was from the ASME's boiler and pressure vessel post construction code - ASME BPVC PCC-1 - which is entirely about bolted joint assembly and torquing procedures.