Kutistuskiinnitys

Kutistuskiinnitys, also known as shrink fitting or heat shrinking, is a method used to fasten components together by exploiting the thermal expansion of materials. This technique involves heating one part of a joint, typically a sleeve or ring, causing it to expand. While expanded, this part is then fitted over a cooler, stationary component. As the heated part cools, it contracts, creating a tight, interference fit with the inner component. Conversely, in some applications, the inner component can be cooled to cause contraction, allowing it to be inserted into a slightly smaller outer component.

The effectiveness of kutistuskiinnitys relies on the predictable expansion and contraction properties of the materials involved. Common materials used for this process include metals, such as steel, aluminum, and brass, as they exhibit significant thermal expansion. The temperature difference required depends on the materials' coefficients of thermal expansion and the desired tightness of the fit. This method is widely employed in various industries, including automotive, aerospace, and manufacturing, for applications like mounting gears, bearings, and couplings onto shafts, or for assembling large structural components. It offers a strong, durable, and often seamless connection without the need for welding or fasteners.