Invented by RBC to solve some of the toughest machine and product control guidance challenges. Two rows of cylindrical rollers delivers tremendous operating advantages in an economical package. Repair and replace cycle is greatly reduced because RBC Roller® cam followers operate up to 5 times longer. "Lubricated for life” — No more need for periodic relubrication or expensive automatic lubrication systems. Operate at much higher rotary speeds — RBC Roller® cam followers operate at speeds up to 2 times higher. Increase load carrying capacity without increasing cam follower size — Up to double the dynamic load rating. Unique contacting lip seals provide positive protection against contamination while keeping grease inside.