To effectively insert a tight inner sleeve into a repair, what should be done to the materials involved?

Chilling one part while heating the other is a common thermal expansion technique used to fit tightly fitting components, such as an inner sleeve into a repair. When materials are heated, they expand; conversely, when they are cooled, they contract. By chilling the inner sleeve, it decreases in size, making it easier to insert into the repair area. Simultaneously, heating the outer material causes it to expand, increasing its diameter.

This method allows for a snug fit without damaging the components or requiring excessive force. Once the components reach a temperature equilibrium, they will return to their original sizes, providing a secure and tight fit. Other methods like lubricants or forcing components together can lead to poor fits or potential damage, and simply cutting them to size doesn't address the inherent thermal expansion properties of the materials involved.