JNS 30mm standard type cam follower with hex socket on both ends and cylindrical outer ring . 30mm stud diameter x 85mm outside diameter x 35mm width x M3X1.5 thread size. . The Cam Followers is a highly rigid bearing, which consist of needle rollers between a shaft and a thick outer ring. The thick outer ring is capable of bearing both large radial load and impact load while keeping direct contact with the guiding surface