In an orthogonal cutting system the cutting edge is :

| In an orthogonal cutting system the cutting edge is :

A. In line with direction of tool travel

B. Perpendicular to direction of tool-travel

C. Perpendicular to shear plane

D. Perpendicular to direction of depth of cut

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Explanation:

Orthogonal Cutting	Oblique Cutting
In orthogonal cutting, cutting edge is perpendicular to the direction of tool-travel.	In oblique cutting, the angle between cutting edge and direction of tool-travel is less than 90°.
Chip flow angle is zero.	Chip flow angle is more than zero.
Tool life is less.	Tool life is more.
Two components of forces. Axial (P_x) Tangential (P_z)	Three components of forces. Axial (P_x) Tangential (P_z) Radial (P_xy)
Poor surface finish.	Good surface finish.
Used in slotting, parting, grooving, pipe cutting.	Used in turning, milling, drilling, grinding.