Bolt torque to prevent slipping
Bolt torque to prevent slipping
(OP)
I am trying to figure out bolt torque requirements to prevent slipping. I have a bracket with 1.5" oversized holes to allow for alignment, and a clamping plate with .5" bolts. I am trying to figure out torque requirements for the bolts to keep the bracket in place once aligned. The bolts go into a steel threaded plate in the floor. Any ideas where to start?





RE: Bolt torque to prevent slipping
RE: Bolt torque to prevent slipping
but you asked for a torque, not a bolt loading. so what thread, threads lubed or dry, bolt face diameter. 75 ft/lbs would be a good start
RE: Bolt torque to prevent slipping
RE: Bolt torque to prevent slipping
1/2-13unc-2a x 1-3/4L
RE: Bolt torque to prevent slipping
Machinist Handbook (MH) has equations for similar situation. Obviously you know the coefficient of friction and the force F. You have friction on both sides of the lower plate which must be equal to or greater then F. You then calculate the normal force N which is the tensile load on the bolts. Then use the MH equation to calculate torque.