本文从尖角铣刀割圆出发，拟出了一套钻头牙轮直铣齿的计算公式。

A set of calculating formulae for vertical milling teeth of drilling bit cones is derived herein from cutting rows with Angle cutters.

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弹簧力较小，可避免小铣刀或钻头断裂。

Low sprang force, May avoid the milling cutter or the drill bit break.

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多马刀具公司隶属于山特维克集团，擅长制造高质量的圆柄类整体硬质合金和高速钢刀具，例如钻头、丝锥、铣刀、铰刀和螺纹铣刀等。

Part of the Sandvik Group, Dormer's expertise lies in the manufacture of superior round tools - drills, taps, cutters, reamers and thread milling cutters - in Solid Carbide and HSS.

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