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**Precautions for Measuring Radial Clearance of Bearings**
Published on China Bearing Network, April 8, 2013
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Measuring the radial clearance of bearings is a critical step in ensuring their proper performance and longevity. Here are some important precautions to consider:
1. Whenever possible, use specialized instruments for measurement. These tools provide more accurate results compared to manual methods.
2. If the hand-push method is used, it requires high skill and experience. This approach can lead to significant errors, especially when the clearance is at a borderline condition. In such cases, it's best to rely on instrument-based measurements for better accuracy.
3. When using a measuring gauge, always follow the standard operating procedures. Avoid rolling the roller across the feeler gauge, as this can damage the tool and affect the reading.
4. During the measurement process, ensure that the ball is properly seated in the raceway groove. For sealed bearings, measure before closing the housing. Also, when applying load, remember to subtract the load-induced deformation from the measured value.
5. For multi-row bearings, measure the clearance in each row separately. The average of these values should be taken as the overall radial clearance of the bearing.
Proper measurement techniques are essential for maintaining the reliability of bearings in various mechanical systems. Whether you're working with industrial machinery or automotive components, understanding these precautions will help you avoid costly mistakes and extend the life of your bearings.
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