Worn journals are polished: on the premise of ensuring the designed surface roughness, the minimum machining amount is used for processing, and then the bearings are prepared according to the original design matching performance based on the size of the processed journals and their deviations.

Axle journal bushings: Turn the worn journals smooth and make another steel bushing. Red Star Heavy Industry reminds users that the inner hole and journal of the steel sleeve should be an interference fit, and the outer diameter should be processed according to the original design size and tolerance. Also note that the steel sleeve should be shrink fit onto the journal.
Surfacing journal surface: Use manual arc welding to surfacing the journal surface, and then perform cutting processing to achieve the original designed journal size and deviation. And ensure that the eccentric shaft does not bend and deform. When repairing welding, care should be taken to select the variety of welding rods, the minimum and best surfacing current, the diameter of the electrode should be as small as possible, and the surfacing welding should be symmetrical. During surfacing, care must be taken to avoid local overheating, etc., to prevent deformation, and attention should be paid to selecting the centering datum reasonably during processing to maintain the running accuracy after assembly.