NTN bearing data should have the function

Source: China Bearing Network Time: 2014-05-15

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1. Collision compatibility shaft diameter and bearing bushes are straight to touch and avoid the seizure. The function of constituting the gap is smooth. The data elements that affect the compatibility of conflict and sub-collision are:
.1) The difficulty of forming alloys by metallurgical materials.
.2) Affinity of materials and smoothing agents.
.3) The conflict factor of the pair of data in the absence of smoothness.
.4) Microscopic arrangement of data.
.5) Thermal conductivity of the data.
.6) The size of the data surface and the characteristics of the oxide film.
2. The clamped data allows the external hard particles to be clamped in the smoothing agent to avoid scratching or (and) wear of the abrasive particles. For metal data; low hardness and low modulus of elasticity; clampability is good; Non-metallic materials are not required; for example, carbon graphite; low modulus of elasticity; but the clamping is not good. NTN bearings generally use softer data and harder data to form a conflicting width; generally use softer materials as bearing pads.
3. The running-in property is in the running-in process of the shaft diameter and the bearing bush; the shaft diameter and the bearing bushing error, the coaxiality error, and the appearance roughness parameter value are reduced; the touch is uniform; then the ability of the conflicting force and the wear rate is lowered.
4. The conflict compliance data relies on the elastoplastic deformation of the surface to compensate for the initial cooperation failure function of the sliding conflict. The data with low elastic modulus is better.
5. Wear resistance is the ability of the auxiliary data to resist wear. Under regular wear conditions; wear rate or wear degree, the reciprocal of wear amount to indicate wear resistance.
6. Anti-weariness The ability of data to resist fatigue damage under cyclic loading. At the operating temperature; the strength, hardness, impact strength and arrangement uniformity of the bearing material are very important for the fatigue. The wear-in and clamping data are good. Generally, the resistance to fatigue is poor.
7. Corrosion resistance data resists the ability of corrosion. Smooth oil will gradually oxidize when used in the atmosphere; acidic substances occur; and extreme pressure additives are also contained in most smooth oils; they all corrode NTN bearing data; thus; NTN bearing data requirements With corrosion resistance.
8. The state in which the cavitation resistant solid moves relative to the liquid; when the bubble in the liquid breaks near the solid appearance; the partial impact high pressure or part of the high temperature occurs; the cavitation wear will be incurred. The data against the cavitation wear is called gas resistance. Corrosion. General; copper-lead alloy, tin-based NTN bearing alloy and aluminum-zinc-silicon alloy have good cavitation resistance.
9. Compressive strength accepts unidirectional loads without being crushed or the scale does not change.

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