Timken 2MM9317WICRDUL Angular Contact Ball Bearings

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 where rigidity, low runout, and precise shaft positioning are critical. This MPN 2MM9317WICRDUL (World Part Number: 71917C-T-P4S-DUL) pairs two 85 mm bore, 120 mm outside diameter bearings with an 18 mm width each (36 mm total), a 15° contact angle, light preload (DUL), and ISO P4S precision in a duplex arrangement to enhance spindle stiffness and rotational accuracy. Each bearing is steel-ball, with a CR outer land riding cage and an MBR phenolic cage, part of the 9300WI series (ISO 71917C), and rated for static radial loads of 36,000 N and dynamic radial loads of 37,800 N per bearing, with limiting speeds of 8,600 rpm (grease) or 14,600 rpm (oil). Applications include CNC machining centers, high-speed milling and grinding machines, jig borers, precision lathes, and other high-accuracy machine tools requiring exceptional rigidity, low runout, and thermal stability.