INA imported bearing operation features and commonly used materials

Source: China Bearing Network Time: 2014-09-16

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INA imported bearings are widely used mechanical supports. Their function is to ensure that the bearings have the same life; to support the shaft and the parts on the shaft; and to rotate relative to the machine base, swing and other movements; The conflict between the two is as low as possible; in order to obtain higher transmission power. The commonly used INA imported bearings have drawn up national standards; it is drawn by the principle of rollover conflict; the standard parts produced by specialized chemical factories in batches. According to the operating conditions, the appropriate INA bearing type and type should be selected for combination layout.
Professor pointed out: compared with sliding bearings; INA imported bearings have the following advantages: (1) the use of a brief description; the product has been standardized; and produced by professional manufacturers in large quantities; with excellent interchangeability and versatility. (2) start Low collision torque; power loss. INA imported bearing power (0.98-0.99) is higher than hybrid smooth bearing. (3) The customary scale of load, speed and operating temperature is wide; a few changes in working conditions affect bearing function Not large. (4) Most types of bearings can accept radial and axial loads together; axial scale is small. (5) easy to smooth, protect and protect.
INA imported bearings also have the following defects: (1) Most INA bearings have large radial dimensions. (2) When operating under high speed and heavy load conditions; short life. (3) Oscillation and noise.
1. INA imported bearing layout: INA bearing is usually composed of inner ring, outer ring, rolling body and cage. The inner ring is mounted on the journal (called the shaft ring in the thrust bearing); the cooperation is tight, the outer ring is installed In the bearing hole of the base or part; usually the cooperation is loose. There are races on the inner and outer rings; when the inner and outer rings rotate relative to each other; the roll will roll along the raceway. The roll is the roll element that completes the roll conflict; "Outside; also revolves around the axis. The shape has a spherical shape, a cylindrical shape, a tapered column shape, a needle roller, a drum shape, etc. The role of the cage is to evenly separate the rolling body. For some customary needs; some bearings can No inner ring or no outer ring, or with dustproof, sealing ring and other layouts. 2. Commonly used materials: Roller and inner and outer ring data requirements have high hardness and touch fatigue strength, outstanding wear resistance and impact toughness. Usually It is made of chromium-containing alloy steel; commonly used materials are GCr15, GCr15SiMn, GCr6, GCr9, etc.; after heat treatment, the hardness can reach HRC61-65. The cage is usually stamped with low Carbon steel; high-speed bearings are mostly made of non-ferrous metals (such as brass ) or plastic cage.

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