Tungsten carbide center drill bit is made of high quality tungsten carbide with the advantages of high hardness, wear resistance, corrosion resistance, high temperature resistance, etc., so that the drill bit has the advantages of accurate positioning, quick cutting, good chip removal, and high efficiency. And therefore the center drill bit is mainly used for center hole processing on the end faces of shafts and other parts. More specifically, it is mainly applied for precise positioning of prefabricated holes and guides twist drills for hole processing to reduce errors.
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There are two types of tungsten carbide center drill bits:
1. Type A: Center drill bit without protecting chamfers.
2. Type B: Center drill bit with protecting chamfers.
Wherein, when processing the center hole with a diameter d = 1-10 mm, a center drill bit (type A) without protecting chamfers is usually used.
For drilling the workpieces requiring long processing steps and high precision, a central cone with protecting chamfers (type B) is generally used to avoid damage to the 60° centering cone.
