Rolling Bearing Disassembly Methods and Precautions
Source: China Bearing Network | Date: March 18, 2013
Disassembling rolling bearings requires care to avoid damaging the components. There are several methods available depending on the situation and tools at hand. Below are the most common techniques along with important safety tips. **1. Pressing Method** This method involves using a press to push the bearing off the shaft. It is ideal for cases where the bearing is tightly fitted. The press can be manual, mechanical, or hydraulic. The key is to apply even pressure directly on the inner ring of the bearing, ensuring the force is centered on the shaft. This approach is efficient and reduces the risk of damage if done correctly. **2. Tapping Method** In this technique, a soft metal tool such as a copper rod is used to gently tap the inner ring of the bearing. The outer part of the bearing should be supported to prevent unnecessary stress. A hammer is used to strike the rod, gradually loosening the bearing. This method is simple but requires caution to avoid damaging the rolling elements or the cage. It's best suited for bearings that are not too tightly fitted. **3. Puller Method** A specialized bearing puller is an effective tool for disassembling bearings. By turning the handle, the puller gradually extracts the bearing from the shaft. When removing the outer ring, the two legs of the puller should be spread outward, while for the inner ring, they should be angled inward to grip the inner race. Proper alignment is crucial to avoid damaging the bearing or the puller. **Matters to Note When Using a Puller:** - Ensure the puller hooks onto the inner ring, not the outer ring, to prevent misalignment or damage. - Align the puller’s screw with the center hole of the shaft to avoid tilting. - Be cautious of the hook’s grip to prevent slipping. - Keep the angle between the puller’s legs less than 90 degrees for better control. **4. Heat Removal Method** For bearings that are extremely tight, heating can be used. Oil is heated to around 100°C and poured over the bearing. Once the bearing expands slightly, it can be removed using a puller. This method is particularly useful when the bearing is stuck due to thermal expansion. **Important Tips for Heating:** - Wrap the shaft with asbestos or thin iron before heating to prevent it from expanding. - Only heat the bearing housing, not the bearing itself, to avoid unnecessary damage. - Use a container to collect hot oil and avoid spills. - Wear protective gloves to prevent burns. By following these methods and precautions, you can safely and effectively remove rolling bearings without causing damage to the components or the equipment. Always ensure the right tools are used and that proper safety measures are in place during the process.
Related Bearing Knowledge: - Rolling Bearing Size Series Code - High-Speed Operation of SKF Bearings - Quality Tapered Roller Bearings (e.g., 32011X) - Top 10 KOYO Bearings Selections This article is sourced from China Bearing Network. For more information, visit [http://www.chinabearing.net](http://www.chinabearing.net). Previous: FAG Bearings | KX20 Imported Bearing Comparison Next: Bearing Retainer and Structural Features
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