机车车辆的设计人员一直在寻找减少轮缘磨耗的办法，以达到延长使用寿命、降低维修费用的目的。通过机车轮对自由横动量对机车曲线通过性能影响的定性分析，来探讨合适的轮对横动量，使之在不影响其它结构、性能的前提下，达到降低轮缘磨耗的目的。对定型机车的设计、改造尤为适应。 Locomotive and rolling stock designers have been looking for ways to reduce wheel wear, in order to achieve the purpose of extending service life and reducing maintenance costs. Through the qualitative analysis of the influence of freewheeling on locomotive curve passing performance by locomotive wheels, the appropriate wheelset traverse is explored to reduce the wheel rim wear without affecting other structures and performances. The stereotypes locomotive design, transformation is particularly adapted.