Manufacturing And Production Technology
The grooving is an operation of

Reducing the diameter of a workpiece over a very narrow surface
Enlarging the end of a hole cylindrically
Embossing a diamond shaped pattern on the surface of a workpiece
Beveling the extreme end of a workpiece

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Manufacturing And Production Technology
Shrinkage allowance on pattern is provided to compensate for shrinkage when

The temperature of metal drops from pouring to room temperature
The temperature of liquid metal drops from pouring to freezing temperature
The temperature of solid phase drops from freezing to room temperature
The metal changes from liquid to solid state at freezing temperature

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