Manufacturing And Production Technology
While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is

Independent of index change gear ratio
Interrelated to index change gear ratio
Independent of speed and index change gear ratio
Dependent on speed change gear ratio

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Manufacturing And Production Technology
In determining the various forces on the chip, Merchant assumed that the

Only continuous chip without built-up-edge is produced
All of these
Cutting velocity remains constant
Cutting edge of the tool is sharp and it does not make any flank contact with the workpiece

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