曲轴磨床(MQ8240、MQ8260等)是用来精加工的，其横向进给机构的精确度直接影响产品质量。如图1所示，磨削曲轴时，砂轮架快进，丝杠头部顶到丝堵端面上，形成点接触，这样横向进给能够做到准确无误，并且手轮转动很轻松。可长时间工作后，容易出现进给困难、准确度较差等问题。 Crankshaft grinding machines (MQ8240, MQ8260, etc.) are used for finishing, and the accuracy of the infeed mechanism directly affects the quality of the product. Shown in Figure 1, grinding the crankshaft, the wheel frame fast forward, the top of the screw head to the end of the wire plug, the formation of point contact, so that the lateral feed can be accurate, and hand wheel rotation is very easy. After working for a long time, it is easy to have problems such as feeding difficulty and poor accuracy.