Power screw + nut axial forces and torsional stress

[mawad]

Dear All,
I have a question related to using power screw. Power screw is used to convert torque into axial forces on the nut. The axial forces between the nut and power screw will be equal and opposite to each other and the applied torque on the screw is function in applied forces. My question does the applied torque translate also on the nut or just the axial forces. I mean the nut will be subjected to axial forces between the nut and the screw only or there will be also torque on the nut equal to the applied torque on the screw itself.

 

[kiwitom235]

yes there will be a torque also. basically the thread surface force can be seperated into an axial force and torque force. the thread angle will be the main factor determining the axial force to torgue force ratio.

 

[tbuelna]

Depending on how precise you need your calculations to be, there is also the difference between static and dynamic frictions to consider.