Reference of front cutting-edge profile of center drill bit/chamfer drill bit/profile drill bit

材种：SKH4C/SKH55A/SKH57A/ASP60C/K10/HRF10/MR11/PR40/VRA201/VWA441/VWA431

Situation of general drilling holes

Alloy steel, heat treatment steel, stainless steel

Cutting-edge profile after point angle changes

Even the same helix angle, when point angle is 118°,
cutting-edge is straight line, but if 135° it is an internal
cylinder, if 90°, it is a cylinder.

Strengthened and toughness shear-steel, hard materials

Cast iron, aluminum

Plain shank drill bit for high hardness application

Masses drill for machining high manganese steel

★We can also profile and precision grinding machining according to requirements of drawings, samples.
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