The THK Roller Follower is a compact and highly rigid bearing system. It contains needle bearings and is used as a guide roller for cam discs and straight motion. Since its outer ring rotates while keeping direct contact with the mating surface, this product is thick walled and designed to bear an impact load. The Roller Follower are divided into two types: separable type whose inner ring can be separated, and non-separable type whose inner ring cannot be separated.