In this paper, a mathematic relationship between space position of gagesurface and bit size, and other design parameters is derived on the basis of geometry of cone bit.
本文从新的几何关系出发，推导了牙轮背锥规径圆空间位置与钻头直径及其它设计参数的数学关系。
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Tapered bores for keyed hubs shall have a minimum of 70% transfer of bluing (surface contact) to the taper gage.