JNS 18mm standard type cam follower with hex socket on both ends and cylindrical outer ring . 18mm stud diameter x 40mm outside diameter x 20mm width x M18X1.5 thread size. Equivalent to INA KR40X. 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