During turning of a low carbon steel bar with TiN coated

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During turning of a low carbon steel bar with TiN coated carbide insert, one needs to improve surface finish without sacrificing material removal rate. The achieve improved surface finish one should

1. Decrease nose radius of the cutting tool and increase depth of cut
2. Increase nose radius of the cutting tool
3. Increase feed and reduce nose radius of the cutting tool
4. Increase depth of cut and increase feed

Correct Option: B

By increasing nose radius, surface finish increases.

H_max =	f²
	8R

H_max ↓ R ↑