## Angles of Single Point Cutting Tool

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Angles of single point cutting tool

__Angles of Single point cutting tool :__

**1: Side Cutting Edge Angle:**

The angle between side cutting edge and the side of the tool shank is called side cutting edge angle. It is often referred to as the lead angle.

**2: End Cutting Edge Angle:**

The angle between the end cutting edge and a line perpendicular to the shank of the tool shank is called end cutting edge angle.

**3: Side Relief Angle:**

The angle between the portion of the side flank immediately below the side cutting edge and a line perpendicular to the base of the tool.

**4: End Relief Angle:**

The angle between the end flank and the line perpendicular to the base of the tool is called end relief angle.

**5: Back Rake Angle:**

The angle between the face of the tool and line perpendicular to the base of the tool measures on perpendicular plane through the side cutting edge. It is the angle which measures the slope of the face of the tool from the nose, towards the rack. If the slope is downward the nose it is negative back rake.

**6: Side Rake Angle:**

The angle between the face of the tool and a line parallel to the base of the tool measured on plane perpendicular to the base and the side edge. It is the angle that measure the slope of the tool face from the cutting edge, if the slope is towards the cutting edge it is negative side rake angle and if the slope is away from the cutting edge, it is positive side rake angle. If there is no slope the side rake angle is zero.