JNS 12mm eccentric type cam follower with hex socket on both ends and cylindrical outer ring . 12mm stud diameter x 32mm outside diameter x 14mm width x M12X1.5 thread size. . The Cam Followers is a highly rigid bearing, which consist of needle rollers between a shaft and a thick outer ring. The bearing shaft�s mounting part and the bearing part are eccentric. It is possible to adjust the distance between the bearing and the track by turning the shaft. The thick outer ring is capable of bearing both large radial load and impact load while keeping direct contact with the guiding surface