This ball retainer is a high-performance component engineered to replace sliding friction with precise rolling motion. It features a base material—available in copper alloy (FZH), aluminum alloy (FZL), or POM resin (FZP)—machined with an array of precision holes. Each hole is embedded with a steel ball and securely locked using a specialized circumferential oil-groove process.

The design ensures smooth, low-friction movement with high repeatability and minimal backlash. Ideal for applications requiring high precision and rigidity, it is commonly used in cold punch die sets, high-accuracy machine tools, and equipment requiring simultaneous axial and radial motion.