Analysis of practical skills to replace motor bearings
July 22 11:32:27, 2025
**Analysis of Practical Skills for Replacing Motor Bearings**
Home > Bearing Knowledge > Research on the Practical Skills of Replacing Motor Bearings
*Source: China Bearing Network | Date: April 21, 2013*
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Replacing motor bearings is a critical maintenance task that requires precision and care. Improper handling can lead to internal damage, such as contamination or misalignment, which may significantly reduce the lifespan of the bearing. When disassembling a vibrating screen bearing, it's essential to be cautious. The shaft must be properly supported, and the force applied during removal should be controlled to avoid damaging the bearing.
Here are some key steps and techniques for safely replacing motor bearings:
1. **Disassembling the Outer Ring**:
If the outer ring is in interference fit, use clamps to secure it around the housing and evenly tighten the screws on one side. In some cases, the screw holes may be covered with blind plugs. For tapered roller bearings, special tools or punches can be used to gently remove the bearing. Careful attention should be given to the number of markings on the housing block to ensure correct alignment.
2. **Removing the Inner Ring of Cylindrical Bearings**:
For cylindrical hole bearings, the inner ring can often be pulled out using a puller. Ensure that the pulling force is applied directly to the inner ring to avoid unnecessary stress. For heavy-duty bearings, an oil pressure method can be used. By applying pressure through the oil hole on the shaft, the bearing becomes easier to remove. Large bearings may require a bearing puller to assist in the process.
3. **Heating for NU and NJ Type Bearings**:
Bearings of the NU and NJ type can be removed using induction heating. Heating the bearing briefly causes the inner ring to expand slightly, making it easier to pull off the shaft.
4. **Disassembling Split-Hole Bearings**:
For medium-sized tight-fitting bearings, support the inner ring on the shaft using blocks. Then, turn the screws back and tap the block with a hammer to loosen the bearing.
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This article was originally published on [China Bearing Network](http://www.chinabearing.net). Please cite the source if you reproduce this content.
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Next: Details on Smoothness and Sealing of Imported SKF Tapered Roller Bearings
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*Note: This article has been rewritten and expanded to meet the required length and provide a more natural, human-like tone while maintaining the original technical content.*
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