首先托辊的加工工艺对托辊的性能颇为重要，托辊的加工精度主要指外壳及托辊两端内孔的同心度以及各零件轴向尺寸的加工精度。若同心度太差，会造成滚动轴承咬死、增加阻力，降低使用寿命；若零件的轴向尺寸误差太大，会形成较大的轴向间隙，导致轴向窜动，破坏润滑和密封；若安装质量不好，将发生跑偏、咬卡、加剧磨损等，大大降低托辊使用寿命。

Firstly, the processing technology of the idler is very important to the performance of the roller. The processing accuracy of the roller mainly refers to the concentricity of the inner hole at the ends of the shell and the roller and the machining accuracy of the axial dimension of each part. If the concentricity is too poor, will cause the bearing seizure, increase resistance, reduce the service life; if the axial part size error is too large, will form a large axial gap, resulting in axial damage, lubrication and sealing; if the installation quality is not good, the deviation and bite card, increased wear, greatly reduced roller life.

托辊制造工艺也会影响托辊动载荷，产生动载的基本原因是托辊外壳壁厚不等和外壳径向跳动引起的质量不平衡。

The roller manufacturing process will also affect the dynamic load of the roller, and the basic reason of the dynamic load is the uneven mass of the shell of the idler shell and the radial runout of the outer shell.