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Analyze the appearance of rolling bearings

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The appearance of the rolling bearing can be viewed under the astigmatism lamp; the items viewed from the exterior are mostly related to the accuracy of the bearing; the performance and the number of life; therefore, be careful when viewing; do not think that this is not important.
The main points of attention in the appearance review are as follows:
(1) various cracks; such as original data cracks; casting cracks, heat treatment cracks and grinding cracks; these cracks will be a source of stress gathering and agile expansion in the future bearing operation; forming a bearing break; The number and operation safety have a great impact. In fact; the bearings for important uses; the bearing factory has 100% magnetic or radiographic inspection of its components.
(2) All kinds of mechanical scars; such as abrasion; scratches, crushes, bumps, etc.; will result in poor bearing device; incurs eccentric load and stress gathering; formation of rotation accuracy and reduction in service life.
(3) Corrosion, black skin and pitting; the latter two are shortcomings of simple storage of water and dirt; the simplest is to carry out rust. Corrosion is a source of pollution that causes equipment failure, early wear and fatigue; severe corrosion will cause The bearing is invalid.
(4) peeling and folding; the two shortcomings are not well connected to the base metal; and there are often decarburization or carbon-poor appearances around the same degree; the data simply collapses, embosses or wear; And the accuracy is very arrogant.
(5) Riveting or welding quality of the cage; firstly investigate whether the rivet head can be biased, tilted, slack, lack of meat or “double eyelids”; the orientation of the welding can be correct; the solder joint is too large. Hard 焕 蚝 蚝 鹂ㄗ 鹂ㄗ 鹂ㄗ 鹂ㄗ 龆逑窒螅 龆逑窒螅 ┍ ┍ ┍ ┍ ┍ ┍ ┍ ( ( ( ( ( ( ( 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 20. 芑刈 纾 纾 庑┮闳绮 庑┮闳绮 螅恍≡蛟 螅恍≡蛟 螅恍≡蛟 螅恍≡蛟 螅恍≡蛟 螅恍≡蛟 螅恍≡蛟 螅恍≡蛟 螅恍≡蛟 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊 笤蚩赡芊
If any of the above is found from (1) to (5), the bearing will not be inspected. Others such as typing quality are unsatisfactory; if the handwriting is vague or damaged; all should be considered as defective; severe ones may not be tested. Then the bearing installation rules must not have visible burns (annealing marks).

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