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Larger end cutting edge angle tool life

This question belongs to Mechanical Engineering Manufacturing And Production Technology
Manufacturing and Production Technology
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Larger end cutting edge angle _________ tool life.

Answer & Solution
Correct Answer: Option A
At the same feed rate, increasing the side cutting edge angle increases the chip contact length and decreases chip thickness. As a result, the cutting force is dispersed on a longer cutting edge and tool life is prolonged.
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3 Comments
Sarveshwer Chandra
Sarveshwer Chandra 6 years ago
Decreases
Sarveshwer Chandra
Sarveshwer Chandra 6 years ago
If End cutting edge angle increases, simultaniously it decreases the lip angle or wedge angle of the tool.

So, due to other factors like stress concentration, heat dissipation will decrease the tool life
Madhavan Palmani
Madhavan Palmani 7 years ago
The main function of end cutting edge angle is to prevent the trailing front cutting edge of the tool from rubbing against the work. The end cutting edge angle varies from 8 to 15 degree. A large end cutting edge angle decreases tool width which in turn weakens the too and decreases tool life.

So answer is "B".
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