A 60-foot gear when hobbed on a differential hobber with a two-start hob, the index change gear ratio is governed by which one of the following kinematic balance equations?

1 revolution of hob \[=1/60\] of blank revolutions.

1 revolution of gear blank \[=1/60\] of hob revolutions

1 revolution of hob\[=2/60\] of hob revolutions

A 60-foot gear when hobbed on a differential hobber with a two-start h

1.	A 60-foot gear when hobbed on a differential hobber with a two-start hob, the index change gear ratio is governed by which one of the following kinematic balance equations?
A.	1 revolution of gear blank \[=1/60\] of hob revolutions
B.	1 revolution of gear blank \[=1/60\] of hob revolutions
C.	1 revolution of hob\[=2/60\] of hob revolutions
D.	1 revolution of hob \[=1/60\] of blank revolutions.
Answer» D. 1 revolution of hob \[=1/60\] of blank revolutions.

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A 60-foot gear when hobbed on a differential hobber with a two-start hob, the index change gear ratio is governed by which one of the following kinematic balance equations?

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