Orthogonal and Oblique cutting

ORTHOGONAL CUTTING 

1.The cutting edge of the tool is perpendicular to the direction of travel

2. The flows over the tool face and the direction of chip flow velocity is normal to the cutting edge. The chip coils in a flat spiral 

3. Only two components of the cutting forces are acting on the tool. These two components are mutually perpendicular to each other. 

4. For the same feed and depth of cut, the cutting forces act on a smaller area and therefore the heat developed per unit area due to the friction along the tool work interface is more and the tool life is less.

OOBLIQUE CUTTING

1.The cutting edge is inclined at an angle less than 90⁰ to the direction of travel 2.The chip flows on the tool face making an angle with the normal on the cutting edge. The chip flows sideways in a long curl 3.Three components of the forces(mutually perpendicular) act at the cutting edge

    4.The cutting act on large area and therefore heat and friction per unit area is less and the tool life is more.