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Engine crankshaft front bearing outer ring of the work of the Central Standing Committee to rotate in the bearing bore, also known as the bearing away the outer ring. Take the outer ring causes the bearing bore fast grinding large increase around the crankshaft bearing bore misalignment can cause the crankshaft broken and cylinder cracks. INA Bearing ball tight card seat ring squeeze bad ball protection operation or cause the ball flaking, decline in bearing life.
INA bearing outer ring and bearing bore transition fit easily cause the bearing to go outer ring phenomenon, mainly due to:
1, the engine work excessive vibration;
2, the explosion pressure generated in the operation of the engine, wherein a force component through a connecting rod, crankshaft and bearing passed to the cylinder, in this process, the outer ring of the bearing will produce rotation;
3, the effect of temperature. Than the outer ring of the general temperature of the bearing inner ring high around 10 ° C, not the same degree of thermal expansion, the ball and the raceway gap disappear, and even cause interference fit, the result is not to squeeze the ball protector bad, that is, the outer ring rotation.
Take the outer ring of the crankshaft front bearing should take the following method of repair:
1, the repair should be strictly controlled INA bearing hole misalignment, the misalignment of the crankshaft main journal and the center line of the connecting rod journal and the non-parallelism of the spindle neck.
, Bearing away the outer ring, the outer ring surface plated Babbit, the better. The method is: to remove the oil from the surface of the bearing outer ring (bearing may be removed from the crankshaft); babbitt with a hot soldering iron hot, evenly coated on the surface of the outer ring, or babbitt melting container, bearing one revolution in the melt can be. But be wary of the alloy stick to the ball; bench vise with INA bearing crankshaft, trimming the outer ring to flat file to the required size.
3 sandwiched between INA bearings and bearing bore copper or grooving to play off of. Clip the tinsel this method is temporary, can not be trimmed ovality, and misalignment of the bearing bore will increase, the effect is not good. Some slots in the bearing bore and the seat ring and into the pin, this method at the grooving prone to stress concentration and damage to the bearings and the cylinder block.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-344/332 NTN | 40 | 80 | 22.403 |
| 4T-28158/28300 NTN | 40 | 76.2 | 20.94 |