71930 thin‑walled angular contact ball bearing maintains compact cross‑section under large bore dimension, delivers reliable combined radial‑axial load support for light‑medium load precision machinery. Low friction loss enables continuous high‑speed operation, suitable for large‑size light‑duty rotary rollers and industrial auxiliary spindle devices.

71900 series bearings feature a high-speed angular contact design with ultra-thin section dimensions, engineered to support combined radial and axial loads in an extremely lightweight, compact package with superior rotational accuracy. Available in open configurations only, with bore diameters ranging from 10mm to 50mm and an ultra-thin cross-section height of 6mm across all sizes. These bearings deliver ultra-compact design, significant weight reduction, exceptional high-speed capability, superior axial and radial rigidity, low heat generation, and reliable performance in precision applications, making them ideal for high-speed machine tool spindles, aerospace actuators, robotics joints, medical imaging equipment, semiconductor manufacturing devices, and ultra-precision mechanisms where both weight savings and high rotational accuracy are critical.