A single point cutting tool with 12° rake angle is used

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A single point cutting tool with 12° rake angle is used for orthogonal machining of a ductile material. The shear plane angle for the theoretically minimum possible shear strain to occur

1. 51
2. 45
3. 30
4. None of these

Correct Option: A

From Ernest & Merchant’s Theory for minimum power consumption:

φ =	90 + α	=	90 + 12	= 51°
	2		2

φ = 51°