Multiple choice

While cutting a screw of 4 mm pitch on a lathe having lead screw of 6 mm pitch, the driver gear and the driven gear have ____ teeth respectively.

  1. 40 & 60

  2. 40 & 80

  3. 60 & 40

  4. none of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The gear ratio is (Driver / Driven) = (Pitch to be cut / Lead screw pitch) = 4 / 6 = 2 / 3. Therefore, the driver gear should have 40 teeth and the driven gear should have 60 teeth.

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