Torque vs. clamping force
Torque vs. clamping force
(OP)
Is there any place to find data on fastener torque vs. clamping force?
Specifically (I'm embarassed not to have an intuitive grasp of this) if I get P# force with a fastener of one size at T ft-# torque, will I need more (or less) torque with a larger fastener to get the same P clamping force?
Thanks
Specifically (I'm embarassed not to have an intuitive grasp of this) if I get P# force with a fastener of one size at T ft-# torque, will I need more (or less) torque with a larger fastener to get the same P clamping force?
Thanks





RE: Torque vs. clamping force
Try this website: http://www.fastenersources.com/ or www.fastening.com
your right - this is elementry.
RE: Torque vs. clamping force
RE: Torque vs. clamping force
If I may reiterate:
For constant F, the torque required to produce that force increases with fastener size.
Another way of stating this: increasing fastener size will make it more (not less) difficult to generate by hand the torque required to produce a specific axial force.
RE: Torque vs. clamping force
The clamping force of the bolt also has a lot to do with the type of thread you are using (pitch or lead of the thread) and included angle of the thread profile. This calculation (in one form or another)is in probably all machine design textbooks ever written. Friction coefficients are also included in this calculation.