Timken 2MM9317WI DUL Angular Contact Ball Bearing

The Timken 2MM9317WICRDUL is a factory-matched duplex set of super-precision single-row angular contact ball bearings from the Timken Fafnir 9300WI series, designed for high-speed machine tool spindles with light preload (DUL) to enhance stiffness and reduce runout. This duplex arrangement supports combined radial and axial loads with exceptional rigidity and thermal stability, making it ideal for CNC machining centers, precision milling and grinding machines, jig borers, and other precision spindles. Each bearing has a bore of 85 mm, an outside diameter of 120 mm, and a single width of 18 mm (duplex width 36 mm) with a 15° contact angle; the set is ISO P4S (ABEC 7/9 equivalent) and features a CR outer land riding cage with an MBR phenolic cage material. Static radial load rating is 36,000 N per bearing and dynamic radial load rating is 37,800 N per bearing, with limiting speeds of 13,200 rpm in grease and 26,400 rpm in oil. The MPN is 2MM9317WICRDUL (Manufacturing Part Number: 2MM9317WI DUL) and the World Part Number is 71917C-T-P4S-DUL.