Progressive INA outer spherical bearing work accuracy related information "functional inventory"
Lock Washer Types,Spring Lock Washer,Spring Washers Screwfix,DIN Spring Washer NINGBO YWC IMP. & EXP. CO.,LTD , https://www.nbywc-fastener.comProgressive INA Outer Spherical Bearing Work Accuracy and Functional Inventory Information
When installing a progressive INA outer spherical bearing, it's essential to ensure high precision. Here are some common methods used for accuracy testing:
1. **Compliance with Fit**: This refers to the ability of the surface layer to deform elastically and compensate for initial fit issues and axial deflection during operation. Materials with lower elastic modulus are generally more suitable.
2. **Running-in Properties**: During the running-in process, the shaft diameter and bearing bushing gradually reduce errors in coaxiality, surface roughness, and improve contact uniformity. This helps lower friction and wear rates.
3. **Wear Resistance**: This is the material’s ability to resist wear under normal operating conditions. Wear resistance can be measured by the wear rate or the reciprocal of the wear amount.
4. **Embeddability**: This refers to the ability of a material to trap hard particles within the lubricant, preventing them from scratching or wearing the surfaces. Softer materials with low hardness and elasticity tend to have better embeddability. However, non-metallic materials like carbon graphite may not always perform well in this aspect.
5. **Fatigue Resistance**: The capacity of the material to withstand fatigue damage under cyclic loading. Factors such as strength, hardness, impact resistance, and microstructure play a crucial role in fatigue performance. Good running-in and embeddability can help improve fatigue life.
After assembly, it's important to check the working accuracy of the outer spherical bearing. A common method involves inspecting the Machine tool's INA bearing spindle and measuring radial and axial runout at the shaft head. However, due to the ellipticity and deviation of the spindle surface, it can be challenging to determine the actual degree of misalignment in the rolling elements or the spindle rotation.
6. **Compatibility with Contact**: Ensuring that the shaft and bearing bush maintain proper alignment to avoid seizure. Key factors affecting compatibility include:
- Material and lubricant affinity
- Friction coefficient between the pair of materials without lubrication
- Surface size and oxide film characteristics
- Ease of alloy formation through metallurgical processes
- Microstructure of the material
- Thermal conductivity
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