Manufacturing And Production Technology
The example of snag grinding is

Removing flash on forgings
Grinding the parting line left on castings
All of these
Trimming the surface left by spruces and risers on castings

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Manufacturing And Production Technology
A better machinable metal is one which gives

Higher chip-tool contact area and larger shear angle
Lower chip-tool contact area and smaller shear angle
Lower chip-tool contact area and larger shear angle
Higher chip-tool contact area and smaller shear angle

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