Calculating Bearing Friction Torque in Winding Drum System

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The discussion centers on calculating the bearing friction torque in a winding drum system, specifically using a coefficient of friction of 0.04 for bearings with a 200mm outer diameter. The user is attempting to derive the friction torque from a known load force (F) acting on a 2.5m outer diameter drum. The initial formula proposed, ((1.25*F)/0.1)*0.04, is incorrect as it confuses force with torque. The correct approach involves understanding the relationship between friction force and torque in the context of the system's geometry.

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Simon.T
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I am familiar with the basics concept of kinetic friction (such as pushing a box on a surface), but how do you calculate the friction torque caused by a bearing for example?

In my college assignment, I have been told the bearings in a winding drum have a coefficient of friction of 0.04 (bearing size 200mm OD). The drum is 2.5m OD, and I know the load force on the outside of the drum (lets call it F). The torque caused by the load on its own is 1.25*F. Is the torque caused by the bearing friction therefore ((1.25*F)/0.1)*0.04?

I hope this made some sense...

Any help at all would be appreciated.
 
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check your units ... I think you have a Force there, not a torque.
what Force would it be?
 
lightgrav said:
check your units ... I think you have a Force there, not a torque.
what Force would it be?

Friction force? :confused:
 

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