Shaft diameter and bearing key processing

Shaft Diameter and Bearing Bush Machining

Source: China Bearing Network | Date: 2013-05-08

When machining the shaft diameter, it's essential to ensure that the surface is cylindrical and meets high surface finish standards. To achieve this, fine grinding of the outer diameter is typically required. The direction of rotation during the grinding process should match the actual operating direction of the shaft to maintain consistency and avoid any irregularities. If the surface roughness after finishing doesn't meet the required standards, additional grinding or polishing may be necessary. It's also important to consider the hardness of the shaft after heat treatment, as this will influence the choice of grinding and polishing methods. For the bearing bush, which is usually softer, the inner cylindrical surface should not be ground directly. Instead, processes like boring, diamond boring, scraping, or light grinding are more suitable. When using a grinding method, it's better to use a specialized grinding rod with the same dimensions as the bearing hole rather than matching it with the shaft diameter. Scraping is commonly used for certain types of tile bearings, where a wide-blade scraper is used to create a smooth surface. The depth of the scratches should be shallow to prevent damage to the bearing surface. For more complex bearing bushes with both internal and external shapes, specific boring techniques should be applied based on the exact design. Each method must be carefully selected to ensure optimal performance and longevity of the bearing.
Related Bearing Knowledge The proper functioning of a bearing bush is closely tied to the quality of the bearing alloy casting. Understanding failure modes in permanent magnet bearings can help improve maintenance strategies. A detailed discussion on the functional requirements of motor bearing grease is also essential for long-term performance. Additionally, a multi-angle analysis of sliding bearings, flywheels, and crankshaft bearings provides valuable insights into repair and maintenance practices. This article was originally published on China Bearing Network. Please visit http://www.chinabearing.net for more information. Previous: Analysis of New Specifications for Wind Turbine Bearings Next: Advancement of Precision Imported Bearings and How to Select Them Based on Torque Requirements

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