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Distinctive depiction of adjustable clearance rolling ball bearings (1)
**Distinctive Depiction of Adjustable Clearance Rolling Ball Bearings (1)**
Home > Bearing Knowledge > Distinctive Depiction of Adjustable Clearance Rolling Ball Bearings (1)
Source: Bearing Network | Date: December 8, 2013
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Rolling ball bearings are widely used in industrial and daily applications due to their low friction, high efficiency, smooth operation, and ease of replacement. However, achieving the desired precision can be challenging. Standard bearings are manufactured using specialized machines by professional factories, with limited adjustability due to the fixed geometry between the inner ring, outer ring, and rolling elements. The radial clearance is typically controlled through machining and surface finishing, but even with high-precision equipment, it's difficult to achieve exact alignment during installation.
As a result, bearings are usually selected by measurement and installed using a grouping method, which limits accuracy and increases costs. Moreover, as the bearing wears over time, the clearance increases, reducing performance and lifespan. This issue has become more pressing with the development of modern manufacturing, prompting the need for improved solutions.
To address this, researchers have analyzed the key factors affecting radial clearance accuracy. By rethinking the bearing design, a new layout was developed that allows for easy adjustment of the clearance. This innovative approach enables users to fine-tune the bearing's performance without requiring complex machinery or expensive replacements.
One traditional method involves tapering the inner bore of the inner ring and the shaft journal to allow for minor adjustments. While this technique works to some extent, it has limitations—such as a small adjustment range, the need for high-precision machining, and potential stress on the inner ring. These issues make the method less than ideal for many applications.
Further analysis revealed that the outer ring could be a better target for modification. Instead of trying to change the inner components, the idea was to break from conventional thinking and consider axial adjustments. By splitting the outer ring into two halves and introducing a special curved surface, the relative movement of the outer ring could be converted into radial displacement of the rolling elements. This allowed for precise control of the clearance.
Based on this concept, a new design was proposed: an axially split outer ring combined with double-row rolling elements and adjustable shims. By increasing or decreasing the thickness of the shims, the radial clearance can be easily adjusted to meet the required specifications. Once set, the outer casing is secured using threaded connections.
This design not only simplifies the adjustment process but also allows for easy maintenance. If the bearing wears over time, the shims can be modified to restore the original clearance and performance. This makes the system more durable and cost-effective in the long run.
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