A single short thread of pitch 2 mm is to be produced on a lathe having a lead screw with a double start thread of pitch 4 mm. The ratio of speeds between the spindle and lead screw for this operation is:

A single short thread of pitch 2 mm is to be produced on a lathe ha

1.	A single short thread of pitch 2 mm is to be produced on a lathe having a lead screw with a double start thread of pitch 4 mm. The ratio of speeds between the spindle and lead screw for this operation is:
A.	1 : 2
B.	0.0840277777777778
C.	1 : 4
D.	0.167361111111111
Answer» D. 0.167361111111111

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A single short thread of pitch 2 mm is to be produced on a lathe having a lead screw with a double start thread of pitch 4 mm. The ratio of speeds between the spindle and lead screw for this operation is:

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