Preventing tool rubbing on the work: what geometry feature is used? In single-point cutting tools, which feature is provided to avoid rubbing and to ensure only the cutting edge contacts the work? Choose the correct feature.

Given/ConceptTo prevent rubbing, the tool's flank is ground with a clearance (relief) angle so the surface behind the cutting edge clears the newly machined surface.

Why others are wrong

• Rake angles mainly influence chip flow/forces.
• Approach angle is tool orientation in plan view.
• Nose radius improves finish/edge strength but does not create clearance.

Final AnswerRelief (clearance) angles