concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero cutters have irregular profiles on their cutting edges to produce required outlines on the work.

Concave and convex milling cutters are used to produce  concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero and  concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero surfaces respectively using gear milling cutters.

The portion of the teeth next to the cutting edge is known as  concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero.

 concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero angle is the angle between land of the tooth and the tangent to the outside diameter of the cutter at the cutting edge of the particular tooth.

 concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero angle is the angle between the back of the tooth and the tangent drawn to the outside diameter of the cutter at the cutting edge.

 concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero Angle is the angle formed by the secondary clearance surface and the tangent to the periphery of the cutter at the cutting edge.

 concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero angle is the angle measured in the diametral plane between the face of the tooth and a radial line passing through the cutting edge of the tooth.

If the radial line and the tooth face coincide in the diameter plane the rake angle is  concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero.

Horizontal milling is also called as  concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero milling

 concaveconvexfaceFormPrimary clearanceRakeReliefSecondary ClearanceslabStraddlezero milling is the operation of production of two vertical surfaces on both sides of the work by two side milling cutters mounted on the same arbor.