INA outer spherical bearing running accuracy should have the performance of the material

Believe about the importance of INA bearings running accuracy needless to say, everyone knows the importance of outer spherical bearing running accuracy is to determine the service life of the bearings and crucial step to control noise, so must be detected when installing an accurate number, here is a commonly used detection methods. 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. Outside the spherical bearing 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. After the spindle assembled outside need to check the operation precision of spherical bearing. The most commonly used method is INA bearing spindle machine tool inspection method. On the shaft head of the surface of the appropriate measurement of radial and axial runout. But practice shows that the spindle measured on the surface of the ovality and eccentricity are usually very big, difficult to get the real rolling bearing or spindle eccentricity. Running accuracy testing bearing and a better way, is a through precise grinding ball welded to the loading on the joint of the shaft head. Will trace indicator or similar instrument have the same precision of measuring contact loaded on the ball. Fixed ball joint fixed on the shaft head, the fixed way should be made to tapping the ball after the ball can move perpendicular to the main axis. Spindle rotates to obtain the minimum reading is no-load INA bearing spindle radial accuracy. Horizontal position indicator in the sphere of reading is the main shaft axial runout of value. If you are rotating inner ring raceway deviation from the centerline of shaft, the shaft beating will be twice the eccentricity.