Shrink Fitting Systems 

Shrink Fitting With Induction for Thermal Expansion

Shrink fitting is an assembly process in which two components of similar size are joined together by thermally expanding one component so that another cold, non-heated component can be inserted into the thermally expanded part. After cooling, the heated part contracts and squeezes the non-heated part, forming a semi-permanent assembly that does not require welding, soldering, bonding, or mechanical fasteners. Powertrain and driveline components are often assembled using induction heating for shrink fitting processes. Gears, bearings, seals, cylinder liners, and connecting rods are commonly assembled using shrink fitting techniques.  Shrink fitting is also popular for electric vehicle and motor assembly in which stators and shafts with interference fits are assembled with stator housings and rotor windings. Diamond and carbide cutting tool inserts are increasingly being assembled using shrink fitting instead of brazing to reduce energy consumption, increase the durability of the inserts, and increase operator safety and comfort.