为满足自行车中轴生产的需要,上海机床厂已完成了新颖的H149型自行车中轴磨床的设计工作,现已正式投产制造。该机床主要用来磨削自行车中轴的二个弹道型面,能适用目前国内所有规格的自行车中轴弹道加工,工件转速可在300～770转/分范围内作有级调速,砂轮线速度为45米/秒,班产达1200根,加工表面光洁度达▽7以上,不圆度允差为 In order to meet the needs of the bicycle shaft production, Shanghai Machine Tool Works has completed the design of the novel H149 bicycle shaft grinder and has been officially put into operation. The machine tool is mainly used to grind the two ballistic profiles of the bicycle’s central shaft. It can handle all kinds of bicycle mid-axis ballistic processing of all domestic specifications at present. The speed of the workpiece can be regulated at a speed of 300-770rpm. Speed ​​of 45 m / s, class production up to 1200, the surface finish of processing ▽ 7 or more, non-round tolerance