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。

The processing technology of the roller is very important to the performance of the roller, and the machining precision of the roller mainly refers to the concentricity of the inner hole at both ends of the shell and the roller and the machining precision of the axial size of each part. If the concentricity is too poor, it will cause the rolling bearing to bite, increase the resistance and reduce the service life. If the axial size error of the part is too large, it will form a larger axial gap, which causes the axial movement to destroy the lubrication and seal. If the installation quality is not good, it will run off, bite the card, aggravate the wear and so on, greatly reducing the use of the 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 manufacturing process of idlers will also affect the dynamic load of idlers. The basic reason for the dynamic load is the quality imbalance caused by the uneven wall thickness of the roller housings and the radial runout of the housings.