Thin walled bearings are high-precision products with minimal operating noise and high load-bearing capacity. These bearings have three different designs, with relatively small cross-sections and mainly square shapes. In each series, even with larger shaft and housing apertures, the cross-section remains unchanged. Therefore, bearings are also known as constant cross-section (CS) bearings. This feature distinguishes thin-walled bearings from traditional bearings described in the standardized ISO series.