**Adjustment of Bearing Axial Clearance**
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**Adjustment of Bearing Axial Clearance**
Axial clearance in bearings is crucial for ensuring smooth and efficient operation. Proper adjustment prevents excessive wear, reduces vibration, and extends the service life of the bearing. There are several methods to adjust axial clearance, including the gasket method and the bolt method.
**1. Gasket Method:**
This method involves using a thin layer of soft material—such as a soft steel sheet or an elastic paper—to adjust the clearance. The gasket is placed between the bearing end cover and the housing end face. It's important not to place the gasket directly on the bearing end cover. Instead, the end cover should be tightened evenly on one side. After tightening, manually rotate the shaft until the rolling elements and outer ring make contact, with no gap present. Measure the space between the end cover and the housing. Add the required clearance for normal operation to this measurement to determine the total thickness of the gasket needed. Once prepared, insert the gasket between the end cover and the housing, then securely fasten the screws.
**2. Bolt Method:**
The bolt method uses an adjusting bolt to apply pressure on the outer ring of the bearing. Before starting, measure the pitch of the adjusting bolt. Gradually tighten the bolt until there is no internal clearance in the bearing. Calculate the corresponding rotation angle based on the desired clearance. For example, if the pitch is 1.5 mm and the required clearance is 0.5 mm, the adjustment bolt must be turned 360 degrees (3600 × 0.5 / 1.5 = 360). After achieving the correct clearance, secure the adjustment with a stop washer.
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**Related Bearing Knowledge:**
- Bearing selection and usage guidelines
- Bearings in aviation and aerospace applications
- Industrial bearing protection and maintenance
- Common causes of bearing failure
- Troubleshooting single-axis rear bearing damage
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Original article published on August 10, 2014
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*This content is intended for educational purposes only. Always refer to manufacturer guidelines when working with bearings.*
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