LR604 Track Roller Bearing 4×13×4mm Yoke Type Cam Follower for Linear Guide & Automation Equipment Product Overview LR604 is a single row yoke type track roller bearing, specially designed to run directly on track surfaces. It features crowned outer ring surface to reduce edge stress during operation. Made of high-quality GCr15 bearing steel, this compact roller delivers stable rotation and outstanding performance for high-speed linear motion applications. *Need a quick quote