why the inner ring of a knock on the broken, and other small manufacturers desperately not broken, is the material problems or other reasons? The hardness is about the same. LYC62 another 63. How can this be explained? Seek expert advice!
You may have this bearingImitationThe hardness is not too high,High imitation is the quality of the bad ah!May not be annealed, hard, dryPay attention later
May not be annealed, hard, dryPay attention later
You may have this bearingImitationThe hardness is not too high,High imitation is the quality of the bad ah!
