In this paper calculation formulas of differentialchangegear raito and index change gear raito for Oerlikon and Klingelnerg bevel gear generating machines are derived.
导出奥利康和克林根贝尔格锥齿轮铣齿机差速挂轮比和分齿挂轮比计算通式；
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The engine and the gear box are connected with each other by a stepless speed change device, thereby allowing the differential brake turn, small turn radius and flexible turn.