Calculating Compressive Force on a Bearing based on Applied Torque
Calculating Compressive Force on a Bearing based on Applied Torque
(OP)
I am currently using a screw assembly as a bearing to push a small steel ferrule on to a plastic tube. As the screw turns it slowly pushes the ferrule down over the tube while the opposing force acts agains the engaged threads.
Currenly using about 40 in-lbs of torque to completly secure the ferrule all the way on the tube (only a little more than .1" of total travel distance).
I want to change the assembly to a press fit action and eliminate the screw all togeather but I am not sure how to figure out the appropriate compessive force I am going to need.
Thanks for all the help.
Currenly using about 40 in-lbs of torque to completly secure the ferrule all the way on the tube (only a little more than .1" of total travel distance).
I want to change the assembly to a press fit action and eliminate the screw all togeather but I am not sure how to figure out the appropriate compessive force I am going to need.
Thanks for all the help.





RE: Calculating Compressive Force on a Bearing based on Applied Torque
Well roughly speaking you can estimate the axial force from the torque using this equation:-
F = T/(0.2*d)
where F= axial load
T = torque
d = thread dia
0.2= friction factor for dry threads
If you know your interference you can use this calculator:-
http:
desertfox
RE: Calculating Compressive Force on a Bearing based on Applied Torque
However it should get you sufficiently close to design for a pure axial load installation.