当在车床上使用不带滚动轴承支座的固定中心架时,工件易于过热。这会引起工件膨胀,增加了粘合咬死的可能性。如果用一条金刚砂布,背面涂上润滑脂,包绕工件一圈,使有磨料的一面朝外(见图),状况会有所改善。这样有几个作用:提供一个润滑垫层,降低发热趋势;可使用较高的切削速度,既节省了机动时间,又能降低表面粗 Workpieces tend to overheat when using a fixed center frame without a rolling bearing support on a lathe. This causes the work piece to expand, increasing the likelihood of adhesive seizures. If using an emery cloth with grease on the back and one turn around the workpiece with the abrasive side facing out (see photo), the condition will improve. This has several effects: Provides a cushion layer to reduce the tendency to heat; Higher cutting speeds are used, saving both maneuver time and surface roughness