The ball retainer bearing, made from copper, aluminum, or POM, contains high-quality steel balls arranged at a precise angle and density. It is frequently used in high-precision cold punching molds and machine tools.

The traditional bearing with a hole and shaft usually has a certain gap, resulting in a higher friction coefficient between the hole and the shaft. After the steel ball retainer is applied, the shaft and hole no longer directly contact each other. Instead, they are separated by the slightly oversized steel balls, which significantly improves precision. The rolling friction replaces sliding friction, making the movement smoother, reducing the friction coefficient, and extending the service life. In cases where both rotational and translational movements are involved, a shaft sleeve with or without oil can be used, though this only provides limited precision. When rolling bearings are used, they can meet the needs of rotational motion but not necessarily other complex movements. However, with a steel ball retainer, all requirements are met. This technology is now widely used in high-precision machinery such as precision molds, machine tool spindles, and applications requiring high axial or radial precision.

Structure:

The cage, typically made of bronze for its superior wear and fatigue resistance, secures the balls and prevents contact between them. It features compartments, each accommodating a single ball.

Balls: The balls, typically made of hard materials like steel or ceramic, serve as the bearing surface, rolling between the cage and the supported components.