The Nachi 7317BMU and 7317BMUC3 angular contact ball bearings are precision-engineered for demanding electrical and mechanical applications, featuring an 85mm inner diameter, 180mm outer diameter, and 41mm width for robust performance in compact spaces. These single-row bearings offer a 40° contact angle, enhancing axial load capacity, and are constructed with high-strength JIS SUJ2 steel rings and a machined brass cage for durability and smooth operation. With a dynamic load rating up to 137,000 N and a static load rating of 125,000 N, they handle high-speed applications—supporting up to 3,300 rpm with grease and 4,400 rpm with oil lubrication. The C3 internal clearance ensures optimal performance under varying thermal conditions, while the flush-ground design allows for precise mounting in duplex arrangements. Made in Japan, these bearings are ideal for industrial machinery, motors, and high-precision equipment requiring reliable, long-lasting performance under heavy loads and high speeds.