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The user to the deep groove ball bearing factory is proposed to extend the process quality of deep groove ball bearing life requirements when necessary, such as rolling surface stress state and deformation layer requirements. Generally speaking, the rolling surface in moderate compressive stress state is better, but also with the surface from the ground to the ultra-precision machining stress rate, to determine the process parameters to the fatigue life of machine tool spindle bearing, in this respect, should be made to the bearing member of professional people to solve.
1 SKF bearing assembly method because of deep groove ball bearings are precision products, such as improper assembly channel, it is easy to damage the machine tool spindle bearings, bearing damage. There should be a special mould in the bearing assembly, not axis pressure can only be a small circle, circle, only the stress cycle. General requirements of pneumatic or hydraulic, pressure for use, in the horizontal state under the mold installation, if you prefer bearing channels will cause damage to a power, and make the bearing noise.
2 SKF bearings when removing and installing the same carefully. Careful not to damage the deep groove ball bearings and other parts, especially the interference fit bearing disassembly, difficult operation. Therefore, in the design stage to think ahead to the convenient disassembly, removal tool based on design is also very important. In the demolition, according to the order of disassembly method, drawing, with the condition survey of machine tool spindle bearing, to obtain the demolition job of no danger of anything going wrong.
3 SKF bearing lubricant material allows foreign hard particles clamping and prevent scratching or ( and ) ability to abrasive wear. On metallic materials, low hardness and elastic modulus of low, clamping is good, is not necessarily non-metallic materials, such as carbon graphite, lower elastic modulus, but clamping is not good. Bearing friction pieces generally with a soft material and hard material, usually with a soft material bearing.
4 check the SKF bearing vibration at work from spalling, indentation, rust, crack, wear will be reflected in the deep groove ball bearing vibration measurement, vibration of machine tool spindle bearings on the bearing damage is very sensitive, therefore, through the use of special bearing vibration measuring device ( frequency analyzer etc) can be measured. The magnitude of vibration, through frequency cannot be inferred from abnormal situation.
Rolling metamorphic layer surface mainly refers to the oxide layer, work hardening layer and layer of tissue distortion in physical and chemical properties and the base metal with other surface layer, their strength is poor and the substrate binding is not strong, the fatigue life of the spindle bearings and wear life are extremely unfavorable, should control.
For high precision SKF bearings, the rolling surface roughness smaller required, if the process is not appropriate, the Gao Guangjie surface is not formed by cutting, grinding and rubbing action but particle formation, surface shall be metamorphic layer formed by plastic flow, in fact of the spindle bearing life is also very unfavorable, should also be controlled.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7209CDF NSK | 45 | 85 | 19 |
| 7209BDF NSK | 45 | 85 | 19 |