Under normal use, RAD Tools just need to be calibrated annually. You will want to make sure you maintain the integrity of your product by making sure that all connection points remain clean and undamaged. When using the RAD Pneumatic series of tooling, it is important that you properly oil your tool along with removing excess water build up in your FRL system which is on the RAD Air Caddy. This general maintenance guarantees the longevity of the air motor.