Timken 3MM9110WICRDUM Super Precision Bearing Set

The Timken Fafnir 3MM9110WICRDUM super precision bearing set is a matched duplex pair of single‑row angular contact bearings designed for high‑speed machine tool spindles. It combines a DUM universal duplex matched arrangement with a 15° WI contact angle, medium preload, an open design, and a phenolic cage to deliver low runout, high rigidity, and reliable high‑speed performance in demanding spindle applications. This bearing set is commonly installed in CNC machining centers, precision milling equipment, grinding machines, turning centers, and aerospace manufacturing systems where precision and speed are critical. It is lubricated for grease or oil lubrication compatibility and intended for precision machine tool spindle mounting; common replacements include SKF 71910 CD/P4A, NSK 7910CTYNSULP4, and FAG B71910-E-T-P4S.