Shrink Fitting is a mechanical assembly process that involves heating or cooling components to create a tight, interference fit between them. Typically, the outer part is heated to expand, or the inner part is cooled to contract, allowing easy insertion. As the temperature returns to normal, the components lock tightly together. This method offers strong, permanent joints without welding, adhesives, or fasteners. Shrink Fitting is commonly used in industries such as automotive, aerospace, and heavy machinery for assembling shafts, gears, bearings, and other cylindrical parts.