Timken 2MM308WI DUL Angular Contact Ball Bearing

The Timken 2MM308WI DUL is a factory-matched duplex set of super-precision single-row angular contact ball bearings from the Timken Fafnir 300WI series, designed for high-speed machine tool spindles requiring exceptional rigidity, low runout, and precise shaft positioning. This light-preload duplex pair is designated MPN 2MM308WICRDUL (Manufacturing Part Number: 2MM308WI DUL), World Part Number 7308C-T-P4S-DUL, with a 40 mm bore, 90 mm outside diameter, 23 mm single width (46 mm duplex total), and a 15° contact angle, plus maximum shaft and housing fillet radii of 1.5 mm. The bearings use a CR outer land riding cage with an MBR phenolic cage, are ISO P4S precision (ABEC 7/9 equivalent), and offer a dynamic radial rating of 59,700 N per bearing (C1) and a static rating of 35,000 N per bearing; limiting speeds are 16,900 rpm with grease and 33,800 rpm with oil. They are intended to support combined radial and axial loads in high-speed precision spindle applications and are commonly used in CNC machining centers, high-speed milling and grinding machines, jig borers, and precision lathes. Common replacements include Timken 2MM308WICRDUL, SKF 7308 CD/P4A, and NSK 7308CTYNSULP4.