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1. Friction compatibility
Direct contact of the shaft and the bearing to prevent the adhesion and the formation of the boundary lubrication performance. The material impact Friction compatibility factors:
(1) into the vice of Materials and Metallurgy constitutes the degree of difficulty of the alloy.
(2) affinity and capacity of the material and lubricant.
(3) into a vice material without lubrication state friction factor.
(4) the microstructure of the material.
(5) The thermal conductivity.
(6) the size of the bearing material surface energy and oxidative properties of the film.
2. Embedded
SKF bearings material allows external hard particles clamp into the lubricant to prevent scratching or (and) the ability to abrasive wear. The metal material, a low hardness and a low modulus of elasticity, embedded like, while the nonmetallic materials are not necessarily, for example, carbon graphite, low elastic modulus, but the embedding poor. Sliding bearing friction parcels usually with softer materials with harder materials constitute general use the softer materials do bush.
3 run-in resistance
Shaft diameter and bearing the running-in process, reduce the shaft diameter and bearing processing error, concentricity error, surface roughness parameter values, so that a uniform contact, thereby reducing the ability of the friction and wear rate.
4. Friction compliance
Material initially rely on the surface of the elastic and plastic deformation compensation sliding friction surface with the bad, and the shaft deflection performance. The elastic modulus of a material having low compliance preferred.
5. Wear resistance
Into vice material ability to resist wear. Predetermined wear conditions, the wear rate or the degree of wear, the reciprocal of the amount of wear to the wear resistance.
6 fatigue resistance
Ability to resist fatigue damage in materials under cyclic loading. At use temperature, the bush material strength, hardness, impact strength, and homogeneous resistance against fatigue is very important. Run-in, and embedding good material, usually poor fatigue resistance.
7. Corrosion resistance
Material to resist corrosion. Lubricants when used in the atmosphere is gradually oxidized to produce an acidic substance, and also in the majority of the lubricating oil containing extreme pressure additives, corrosion FAG bearings material they will, therefore, bearing material needs to have corrosion resistance.
8 cavitation resistance
Solid phase for the movement of liquid state where, when the rupture of the bubbles in the liquid in the vicinity of the solid surfaces, generate localized impingement hypertension or local high temperature will cause cavitation wear. The material's ability to resist cavitation wear called cavitation resistance. Typically, the copper-lead alloy, tin-based the NSK bearings alloy and aluminum zinc silicon alloy with good resistance to cavitation.
9. Compressive strength
Withstand the load without the pushed bad or size is not the ability to change one-way.
How to ensure that the bearings in the process of applying normal TIMKEN bearings last longer, how to make the bearing without injury. Following me to come to as we explain the precautions to ensure the reliable operation of the bearing, I hope for your help.
Under normal circumstances, following several requests to ensure reliable operation bearing Note:
First: the bearing clearance should be appropriate, too large an impact, too small, poor lubrication, may be bush-burning.
Second: to improve the lubrication quality control of pressure, temperature and flow rate of the oil, and to strengthen the oil filter.
Third: INA bearings and journal surface quality and geometry should be strictly guaranteed.
Fourth: the compliance of fuel and lubricants.
Fifth: to control the temperature state of the diesel engine, are detrimental to a cold hot. Cold weather, diesel engine starting should be preceded by warm-up, and the hand rotating crankshaft oil into the friction surface.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7201ADB NSK | 12 | 32 | 10 |
| 7021A5TYNDBLP4 NSK | 105 | 160 | 26 |