Progressive INA outer spherical bearing work accuracy related information "functional inventory"
Bearing Related Knowledge Special Flat Washers,Stainless Washers,Thick Washers,Flat Spring Washer DIN NINGBO YWC IMP. & EXP. CO.,LTD , https://www.nbywc-fastener.comProgressive INA Outer Spherical Bearing Working Accuracy and Functional Inventory Information
When installing progressive INA outer spherical bearings, it's essential to accurately measure and assess their performance. Here are some common methods used for evaluation:
1. **Compatibility with Clearance**: This relies on the elastoplastic deformation of the surface layer to compensate for initial fit issues and axis deflection. Materials with lower elastic modulus tend to perform better in such scenarios.
2. **Run-in Characteristics**: During the run-in process, the shaft diameter and bearing bushing gradually reduce errors in coaxiality and surface roughness, leading to more uniform contact and improved resistance to wear and friction.
3. **Wear Resistance**: This refers to the material’s ability to resist wear under normal operating conditions. Wear resistance is often measured by the wear rate or the reciprocal of the wear amount.
4. **Embeddability**: This property allows hard particles to be embedded within the lubricant, preventing them from scratching or wearing the bearing surfaces. Softer materials typically have better embeddability, while non-metallic materials like carbon graphite may not always perform well.
5. **Fatigue Resistance**: The ability of the material to resist fatigue damage under cyclic loading is crucial. Factors such as strength, hardness, impact resistance, and microstructure play a key role. Bearings with good run-in and embeddability properties usually exhibit higher fatigue resistance.
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 end. However, the ellipticity and deviation of the spindle’s outer surface can make it challenging to determine the actual degree of misalignment affecting the bearing or spindle rotation.
6. **Collision Compatibility**: Ensures that the shaft and bearing bush remain in proper alignment to avoid seizing. Key factors influencing collision compatibility include:
- Material and lubricant compatibility.
- Friction coefficient between the two materials without lubrication.
- Surface characteristics and oxide film thickness.
- Metallurgical alloy formation difficulty.
- Microstructure of the material.
- Thermal conductivity of the material.
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