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

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

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Manufacturing And Production Technology
The snag grinding is done

Any one of the above
To grind exterior cylindrical surfaces
To remove considerable amount of metal without regard to accuracy of the finished surface
To produce good surface finish and high degree of accuracy

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