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One side of the brake drum gets more worn-out than the other

  1. Aug 21, 2013 #1
    I have been trying to understand how the hand-brakes in my car function-and hence I read-up on brake drums and their functioning.

    Reasoning that one brake shoe(i.e 1 friction shoe out of a total of 2) always gets worn more than the other: if its a leading-trailing shoe type

    In common-usage, brake drums have an hydraulic force applied(see diagram, F_e) and depending on the direction of rotation of the drum,we can have a leading-shoe and a trailing-shoe.

    I think the trailing-shoe gets more worn-out than the leading-shoe because there is a partial cancellation of the forces (as explained in the diagram) i.e a de-amplification of the input force.

    Is it true in reality? Does one brake-shoe get more worn-out than the other as a theoretical force analysis suggests?

    2.Also,can someone provide an insight into the term 'shoe-factor' that most brake engineers use to describe the self-amplification capacity of brakes? How does knowing this value help in racing?

    Attached Files:

  2. jcsd
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