Calculating Bearing Friction Torque in Winding Drum System

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To calculate the bearing friction torque in a winding drum system, it's essential to differentiate between force and torque. The coefficient of friction for the bearings is given as 0.04, and the load force on the drum is denoted as F. The torque due to the load is calculated as 1.25 times F, but the initial formula presented for bearing friction torque appears to misinterpret the relationship between force and torque. Clarifying the units and understanding that the friction force contributes to the overall torque is crucial for accurate calculations. Proper unit conversion and application of the friction coefficient will yield the correct bearing friction torque.
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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