Rake and Relief Angles

These rake and relief angles are for high speed steel lathe tool bits.

Toolbit angles

Material	Side Relief	Front Relief	Side Rake	Back Rake
Aluminum	12	8	15	35
Brass	10	8	5 to -4	0
Bronze	10	8	5 to -4	0
Cast iron	10	8	12	5
Copper	12	10	20	16
Machine Steel	10 to 12	8	12 to 18	8 to 15
Tool Steel	10	8	12	8
Stainless Steel	10	8	15 to 20	8

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