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Effect of end cutting edge angle on tool life Consider the end cutting edge angle in single-point turning tools and its influence on edge rubbing and heat. State how a larger end cutting edge angle affects tool life.

Difficulty: Easy

Increases tool life
Decreases tool life
Has no effect on tool life
Always reduces wear-land width but shortens life

Correct Answer: Increases tool life

Explanation:

Concept/ApproachA larger end cutting edge angle reduces rubbing of the end flank against the newly machined surface, lowering frictional heating and wear.

Step-by-step reasoning• Larger angle → better end clearance → less contact/rubbing.• Less heat at the end flank → slower wear progression → longer life.

Final AnswerIncreases tool life

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