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At that point how do you ascertain friction vs torque?
- The threads are rough at the microscopic scale
- Rotating the fastener causes the peaks and troughs to ride over one another
- This relative axial movement causes an acoustic excitation of the fastener
- The fastener acts as a band pass filter with a characteristic frequency dependent on the tension
- Following an intensive 11 year period of study at the Sorbonne Institute of Cycleacoustic Phenomena, kimmo is now able to hear this signal and determine the tension directly, irrespective of the tribological conditions.
- The threads are rough at the microscopic scale
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Threads are cut so that all "surfaces" should be in contact.
I've at least picked this up from the mechanical engineers at work.
gbj_tester
Grumpy_Git
@hugo7
What I'm confused about is that when you torque a bolt up, aren't you only engaging the last relevant ¼ - 2 threads?
At that point how do you ascertain friction vs torque?
Is it by feeling the friction involved in tightening up to that point?