K17020AR0 ultra thin wall angular contact ball bearing is metric 20 mm cross‑section open‑type A thin‑section bearing. It takes radial and unidirectional axial loads,features robust slim construction and steady rotation under heavy working conditions. Commonly used for large‑diameter compact rotary modules in industrial and automated machinery.

A-type angular contact ball bearings - 20mm series feature a 15° contact angle design with balanced dimensions, engineered for applications requiring moderate load capacity combined with high-speed capability and excellent axial load support. Available in open, shielded, and sealed configurations, with a fixed bore diameter of 20mm and a cross-section height of 20mm. These bearings deliver smooth high-speed rotation, low heat generation, consistent axial rigidity, and dependable long-term performance, making them ideal for high-speed spindles, servo motors, industrial robots, precision machine tools, medical equipment, and automation systems where reliable operation and rotational accuracy are essential.