Selection of rake angle In terms of cutting heat generation and heat dissipation, increasing the rake angle can reduce cutting heat generation and prevent the cutting temperature from being 

too high. However, if the rake angle is too large, the heat dissipation volume of the cutter head will be reduced, and the cutting temperature will increase instead. Reducing the rake angle can 

improve the heat dissipation conditions of the cutter head and the cutting temperature may be reduced. However, if the rake angle is too small, the cutting deformation will be serious and the 

heat generated by cutting will not be easy to dissipate. Practice shows that the most appropriate rake angle go=15°~20°.

Selection of back angle During rough machining, the strong cutting tool requires high cutting edge strength, so a smaller back angle should be selected; during fine machining, the tool wear 

mainly occurs in the cutting edge area and the back face. For stainless steel, which is prone to work hardening, the friction of the back face has a greater impact on the surface quality and tool 

wear. The reasonable back angle should be: for machining austenitic stainless steel (below 185HB), the back angle can be 6°~8°; for machining martensitic stainless steel (above 250HB), the 

back angle is 6°~8°; for machining martensitic stainless steel (below 250HB), the back angle is 6°~10°.

Selection of blade inclination angle The size and direction of the blade inclination angle determine the direction of chip flow. The blade inclination angle ls is reasonably selected, 

usually -10°~20° is appropriate. When micro-finishing the outer circle, finishing the hole, and finishing the plane, a large blade inclination tool should be used: ls45°~75° should be selected.