Measuring Screw torque
Measuring Screw torque
(OP)
Can someone please explain the best way to measure torque of a screw. How much does torque driver speed influence/ vary screw torque resulting from use of higher vs. lower speed(from torque driver power source) where torque driver is set to 6lb/in^2 (as example)? If margin error is 5% for a torque driver, is it possible to measure 3-5x the margin error?





RE: Measuring Screw torque
http://www.rstechltd.com/rotary_torque_sensors.htm
However, this type of product is more for research work.
For daily measurement, it is best to use a power tool with an integral torque transducer, such as those provided by power tool suppliers like Bosch, Aimco, and Atlas Copco.
Power tool rotation speed influences applied torque only because of variation in the shutoff mechanism (stall, clutch, electric shutoff).
Your units are incorrect - lb/in2 is a stress, while lb·in is a torque.
I would contact one of the power tool suppliers and have them provide you with a product to meet your needs. This is standard equipment that won't require anything new.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Measuring Screw torque
RE: Measuring Screw torque
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.