1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Bearing friction equation?

  1. Mar 7, 2010 #1
    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.
     
  2. jcsd
  3. Mar 7, 2010 #2

    lightgrav

    User Avatar
    Homework Helper

    check your units ... I think you have a Force there, not a torque.
    what Force would it be?
     
  4. Mar 7, 2010 #3
    Friction force? :confused:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook