To ensure high-quality tube expansions, the tube wall must be reduced by a predetermined percentage and be consistent with each expansion. In order to complete the job efficiently, it is important to achieve the maximum expander tool life in order to reduce cost and downtime.

A mechanical tube joint is formed when the outer diameter of the tube is compressed against a fixed container. Rolling to the proper wall reduction will decrease the chances of under rolling and over rolling a tube, creating higher quality mechanical joints.