Bearings should check the rolling element and the inner ring raceway whether there is peeling, cage too Songkuang, is complete front and rear edge of the inner ring, outer ring raceway is not cracked.
Into the outer ring, the inner ring and roller assembly roller should fall into the raceway intermediate, advance the amount of not more than 1.5 mm. Where there is a failure, that can not be used. The outer rings of these bearings are separable. Normal state, the inner and outer ring raceway and roller crushing, pitting and deep wear scar; cage should be no deformation and can roller folds of the inner ring; outer ring raceway and roller son with the gap should not exceed 0.06mm.
Normal state, two raceway should be no peeling injury and severe wear, the ball should be broken and pitting; cage should be no deformation, do not collide with two raceway washers and ball firmly folded together.
Since the majority of enterprises in the innovation system construction and operation, R & D and innovation funding, personnel development is still at a low level, coupled with industry-oriented research institutes services to the enterprise, the state has no common technology industry investment, thus weakening the industry-oriented research and development function.
Therefore, the whole industry, "two weak" outstanding, that weak basic theoretical research, participation in international standard-setting is weak, less original, less proprietary products. Our design and manufacturing technology is basically a simulation, consistent system for decades. Product development capabilities: domestic host matching rate of 80, but the the important host support and maintenance of high speed passenger trains, high-end cars, computers, air conditioners, high levels of mill bearings, basically rely on imports.
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