Timken 3MMC9120WI QUL is a super precision angular contact ball bearing configured as a quadruplex set with light preload (QUL). This ABEC 7 (P4S) precision bearing is designed for high-rigidity machine tool spindles and high-speed applications requiring extreme rotational accuracy and minimal runout.

EXTRA-LIGHT ISO 10 SERIES

HIGH PRECISION MV

Running accuracy, performance and dimensional controls conform to ABEC 7 (ISO P4) requirements.

SUPER PRECISION MM

Running accuracy and performance meet ABEC 9 (ISO P2) levels. Other features conform to ABEC 7 (ISO P4) requirements.

WI CONSTRUCTION

• Incorporates low shoulder on non-thrust side of both inner and outer rings.
• Balls separated by one-piece cage piloted against a ground thrust shoulder land of the outer ring.