NSK outer spherical bearing imported materials should have performance

1. Diameter of axle and bearing friction compatibility when direct contact to prevent adhesion formation and boundary lubrication performance. Factors influencing the friction pair friction compatibility of the material is: ( 1) As a deputy to the difficulty of the composition of alloy materials metallurgy. ( 2) Materials and affinity of lubricant. ( 3) Become vice material in the absence of the friction factor of lubrication condition. ( 4) The microstructure of materials. ( 5) Thermal conductivity of materials. ( 6) The size of the material surface energy and the characteristics of the oxide film. 2. Tongs in the sex material allows foreign hard particles in the lubricant pliers and prevent scratches or ( And) The ability of abrasive wear. For metallic materials with low hardness and elastic modulus, clamp in the sex is good, and the nonmetal material is not necessarily, carbon graphite, for example, low elastic modulus, but the clamp in the sex is bad. NSK outer spherical bearing slide usually use soft material and hard material forming friction, usually made from soft material bearing shell. 3. In the diameter of axle and bearing bush of the running-in process, reduce the diameter of axle and bearing shell processing error, the alignment error and surface roughness parameter values, make contact even, thereby reducing the friction and wear rate. 4. Compliance of friction material on the surface of sliding friction surface initial elastic-plastic deformation compensation to match the performance of the poor and shaft deflection. Low modulus of elasticity of material compliance is good. 5. Abrasion resistance into vice material abrasion resistance. Under the condition of the rules of wear, wear rate or amount of wear, wear the reciprocal of abrasion resistance. 6. The fatigue resistance of material to resist fatigue failure under cyclic load capacity. In the use of temperature, the strength of the bearing shell material, hardness, impact strength and uniformity of fighting fatigue resistance is very important. Running-in, clamp into good material, usually poor fatigue resistance. 7. Corrosion resistant materials, corrosion resistance. Lubricating oil in the atmosphere will be gradually when using oxidation, produce acidic substances, and in most contains extreme pressure additive in lubricating oil, they all NSK outer spherical bearing material corrosion, therefore, NSK outer spherical bearing material needs to have the corrosion resistance. 8. Cavitation resistance motion state, the relative to the liquid when a bubble near a solid surface rupture in liquid, a local impact local high temperature, high pressure or will cause cavitation abrasion. Cavitation abrasion resistance material known as cavitation resistance. Usually, NSK outer spherical bearing copper lead alloy, tin base alloy and aluminium zinc silicon alloy has good cavitation resistance. 9. Compressive strength of unidirectional under load without being crushed or size doesn't change.