A carbide drill bit is a carbide insert welded onto the cutting edge of a twist drill. It is suitable for drilling very hard materials, such as high manganese steel and hardened steel, and is also suitable for high-speed drilling of cast iron. Commonly used carbide blade materials are YG8 or YW2. The geometric parameters of the cutting part of cemented carbide drill bits are generally: γ0=0°-5°, α0=10°-15°, 2φ=110°-120°, ψ=77°The main cutting edge is ground into a small size of R2x0.3 arc.
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