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Single-point tool geometry: rake angle for machining brass with HSS For free-cutting brass and similar brasses using HSS tools, select the recommended rake angle setting. Choose the best value.

Difficulty: Easy

0° rake
10° rake
20° rake
-10° rake (negative rake)

Correct Answer: 0° rake

Explanation:

Approach
Brass is short-chipping and not very strain-hardening; a small or zero rake avoids tool digging-in and helps maintain edge strength and correct geometry.

Notes
Positive rake values (10–20°) are more common for steels and ductile materials to reduce cutting forces; brass typically uses 0° (or a small negative) rake.

Final Answer
0° rake.

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