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

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
The temperature of metal drops from pouring to room temperature

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Manufacturing And Production Technology
The chamfering is an operation of

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

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