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

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Manufacturing And Production Technology
The effect of setting a boring tool above center height leads to

Decrease in the effective rake angle and an increase in the effective clearance angle
Increase in both effective rake angle and effective clearance angle
Decrease in both effective rake angle and effective clearance angle
Increase in the effective rake angle and a decrease in the effective clearance angle

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