Question
Production Engineering (Manufacturing) Question on Metal Casting
To create 12 divisions on a disc by using simple indexing and dividing head on a horizontal milling machine, choose the correct option for the rotation of the crank pin.
A
3 full rotations and 5 holes on a 15-hole circle
B
5 full rotations and 4 holes on a 16-hole circle
C
3 full rotations and 5 holes on a 18-hole circle
D
5 full rotations and 4 holes on a 20-hole circle
Answer
3 full rotations and 5 holes on a 15-hole circle
Explanation
Solution
The correct option is (A): 3 full rotations and 5 holes on a 15-hole circle.