being quite fragile. Nose radius varies depending on the machining operations like roughing, semi-finishing or finishing and also on the component material being cut: steel, cast iron, aluminium and others.

All the other angles are for clearance in order that no part of the tool besides the actual cutting edge can touch the work. The front clearance angle is usually 8 degrees while the side clearance angle is 10-15 degrees and partly depends on the rate of feed expected.

Minimum angles which do the job required are advisable

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