C 6136 N、CW6136型车床主轴前支承在装配和维修过程中,轴承的预紧调整极为困难:当用扳手调整螺母5时,轴承内环轴向位移多少才能满足预紧的目的,很难掌握。预紧得过紧,主轴转动时,轴承出现吱吱叫声,工作温度上升,甚至烧坏轴承;预紧得过松,主轴产生振动,刚性差,回转精度低,切槽和加工精度达不到要 C 6136 N, CW6136 Lathe Spindle Front Bearing During preassembly and maintenance, the preload adjustment of the bearing is extremely difficult: When adjusting the nut 5 with a wrench, the axial displacement of the bearing inner ring can only be achieved by the preload, which is difficult to grasp . Preload too tight, the spindle rotation, the bearing squeak, the working temperature rise, or even burn the bearings; preload too loose, the main shaft vibration, poor rigidity, low precision, notching and processing accuracy up To want