Numerical - Tool width of a gear - Metrology & Quality Control

Q.  Calculate the tool width of a gear having 30 number of teeth and with module 5 mm.
- Published on 07 Aug 15

a. 6.352 mm
b. 5.555 mm
c. 7.850 mm
d. none of the above

ANSWER: 7.850 mm

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    Discussion

  • Sravanthi   -Posted on 26 Oct 15
    Given: Number of teeth = 30, module = 5 mm

    Formula: Tool width = m T sin 90° /T

    here, m = module and T = number of teeth


    Solution:

    Tool width = m T sin 90° /T

    Substituting the given values we get,

    Tool width = 5 x 30 sin (90° / 30)

    = 7.850 mm

    Tool width of the flank is 7.850 mm.

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