The meaning of relief is clearance. So, the relief angle having another name is Clearance Angle.
#. End Relief Angle - End relief angle is defined as the angle between minor flank or minor cutting face and perpendicular line to the base that makes the right angle with a flank. Therefore, it avoids rubbing with the workpiece against the tool in a lateral direction.
#. Side Relief Angle - Side relief angle is defined as the angle between the Major flank or major cutting face and perpendicular plane to the base that makes a right angle with the side. It also avoids rubbing with the workpiece against the same as End relief angle but in a longitudinal direction
In industries most widely examples of single-point cutting tools are turning tool, boring tool, shaping tool, planning and slotting tool.