存在的工艺缺点是：1）轴承座和管子采用焊接工艺造成了轴承座热变形，轴承座的内孔与管子的平行度受到了影响，也就是两端的轴承座的同心度得不到保障，2）由于是手工安设轴承座，轴承座内孔与设备的顶头公差较大（为了便于安设），轴承座的外径与管子止口孔的公差也较大，实际制作的辊体，无法保证图2中所标注的同心度。

Shortcomings of process are: 1) the bearing seat and pipe welding process caused by bearing thermal deformation, and the inner hole of the bearing with parallel pipe affected, namely the concentricity of the bearing at the ends of the protected, 2) because it is handmade make bearing seat, bearing inner hole and equipment of immediate larger tolerance (set) to facilitate, the outer diameter of the bearing and the tube through hole tolerance is bigger also, the actual production of the roller body, there is no guarantee that the concentricity of marked in figure 2.