Manufacturing Processes - 2 - Mechanical Engineering (MCQ) questions and answers for Q. 3782

Q.  Calculate the cutting speed of drilling operation when diameter of drill is 10 mm and rotational speed of drill is 200 r.p.m.
- Published on 04 Aug 15

a. 6.283 m/min
b. 3.142 m/min
c. 8.362 m/min
d. 10.216 m/min

ANSWER: 6.283 m/min

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    Discussion

  • Pankaj   -Posted on 05 Nov 15
    - Cutting speed of drilling operation can be defined as the peripheral speed of a point on the surface of the drill in contact with the workpiece.

    - Given:

    Diameter of the drill (D) = 10 mm

    Rotational speed of the drill (N) = 200 rpm

    - The cutting speed (Vc) of drilling operation is given by,

    Vc = (π D N) / 1000

    = (π 10 200) / 1000

    = 6.283 m/min

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