railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Machining Processes and Machine Tools
According to the Ernst and Merchant theory, the relation between the shear angle (ϕ), friction angle (β) and rake angle (α) in single point cutting tool in turning is as follows:
1
2ϕ + β + α = 90°
2
2ϕ + β - α = 90°
3
ϕ + 2β - α = 45°
4
2ϕ + β - α = 45°