Manufacturing And Production Technology
A diamond locating pin is used in jigs and fixtures because

It helps in assembly with tolerance on centre distance
It has a long life
Diamond is very hard and wear resistant
It occupies very little space

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Manufacturing And Production Technology
In a shaper, the length of stroke is increased by

Increasing the length of the arm
Increasing the centre distance of bull gear and crank pin
Decreasing the length of the slot in the slotted lever
Decreasing the centre distance of bull gear and crank pin

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

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

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