Timken 2MM205WICRDUL Super Precision Bearing Set

The Timken 2MM205WICRDUL is a duplex, matched pair of super‑precision single‑row angular contact ball bearings from the Timken Fafnir 200WI series, factory‑matched with light preload (DUL) for high‑speed, high‑rigidity spindles and minimal runout. Designed for machine tool spindles and precision rotating equipment, it supports precise shaft positioning in CNC machining centers, high‑speed milling machines, grinding equipment, jig borers, and similar tools. Each bearing has a 25 mm bore, 52 mm outside diameter, and 15 mm width, with the duplex set totaling 30 mm in width; the 15° contact angle and duplex arrangement enhance stiffness and thermal stability under combined radial and axial loads. It carries ISO P4S (ABEC 7/9 equivalent) precision, uses a CR outer land‑riding cage made from MBR phenolic resin, and steel balls. Static radial load rating is 10.2 kN (2,320 lbf) per bearing, dynamic radial load rating 18.4 kN (4,130 lbf) per bearing, and ISO dynamic load rating 16.7 kN (3,760 lbf) per bearing. Limiting speeds are 29,800 rpm with grease lubrication and 59,600 rpm with oil lubrication, and the maximum shaft/housing fillet radius is 1.0 mm. This set provides the required combination of high speed, low runout, and excellent thermal stability for precision spindle applications.