3、racticethatthenumberoftheteethofthehangwheelcanbeaccuratelydeterminedandthedrivingprecisionoftransimissionchainsalsoimprovedbymeansofthemethod.Key words helicalgears﹔gear﹔hobbing﹔primenumber﹔seperatingtoothhangwheel 機床類書籍中都較詳細地介紹了滾切齒數大于100的質數直齒圓柱齒輪的調整計算公式,而對于滾切齒數大