发动机曲轴前轴承在工作中常会发生外圈在轴承孔中转动,也称作轴承走外圈。走外圈会使轴承孔快速磨大,曲轴前后轴承孔的不同心度加大,会导致曲轴折断和缸体产生裂纹。同时,轴承滚珠被紧卡在座圈里,运转时会挤坏滚珠保护器或造成滚珠表面剥落,轴承寿命下降。轴承外圈与轴承孔因 Engine crankshaft bearings in the work of the outer ring often occurs in the bearing hole rotation, also known as the outer ring bearing. Take the outer ring will make the bearing hole quickly grinding large, crankshaft bearing bore before and after the increase in the different heart will lead to crankshaft fracture and cylinder cracks. At the same time, the bearing ball is tight stuck in the seat ring, run-time will squeeze the ball protector or cause the ball surface spalling, bearing life decline. Bearing outer ring and bearing holes due