What are self locking brakes? - Theory of Machines - 1

Q.  In the equation Rn = (pl) / (x – μ.a), if x < μ.a then the brakes are  
- Published on 06 Aug 15

a. self energizing
b. self locking
c. self starting
d. None of the above

ANSWER: self locking

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    Discussion

  • Sravanthi   -Posted on 19 Oct 15
    Force applied at lever end (P) is given as :

    P = [Rn (x - μ a)] / l

    1) If x ≤ μ a, effort (P) becomes zero. Hence, the brakes are self-locking because no effort is required to apply brakes.

    2) Self-locking does not occur unless it is specified.

    2) Brakes are called as self energizing, when frictional force is used to apply brakes. Here, effort is greater than zero (P > 0)

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