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Explain orthogonal rake system in detail.
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$\varphi$=Plan approach angle

$\varphi_e$=End Cutting edge angle

$\lambda$=inclination angle

$\alpha$=Rake angle

$\alpha_o$=Side relief angle

$\alpha_o$=End relief angle

r=nose radius

Parameter Defined by
Location of cutting edge $\varphi,\varphi_e$
Orientation of face $\lambda,\alpha$
Orientation of principal flank $\alpha_o$
Orientation of auxiliary flank $\alpha_o^{'}$
Nose radius mm r
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