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 occupies very little space
Diamond is very hard and wear resistant
It has a long life

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Manufacturing And Production Technology
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to

Circular interpolation in clockwise direction and absolute dimension
Circular interpolation in counter clockwise direction and absolute dimension
Circular interpolation in counter clockwise direction and incremental dimension
Circular interpolation in clockwise direction and incremental dimension

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