The shrink fitting process is the method of employing a cryogenic agent to shrink a component so that it will fit into another component easily. When the nitrogen affect components returns to ambient temperature the component will expand to its resting dimension causing a friction (interference) fit with its mating component. This process is ideal for components such as shafts, tappets, sockets, roller bearings. Any component that may require a calculated interference fit.
Liquid nitrogen shrink fitting is one of the safest methods of assembly. The components will suffer no damage. Sometimes shrink fitting is the only possibility to connect different materials, which cannot be cemented, welded or soldered.