Pretty Common... If you are like me you regularly clean these rollers with acohol... Alcohol dries rubber making it hard and brittle. With the hardened rubber coupled with the pressure forced on these rollers they will crack over a period of time. This is considered and expendable/consumable item. Your supplier will carry these and just like extra inks, flushing pads, cleaning solvent, etc. you should always have some extra on hand... JMO...