An interference fit is a type of fastening method where a sleeve or collar is pressed onto a solid shaft with a larger diameter. This creates a tight, frictional grip between the two components, allowing them to function as one unit.
An interference fit can provide several benefits, including increased strength and stability of the joint, improved load distribution, and prevention of slippage or movement between the components.
The amount of interference required for a tight fit depends on factors such as the material and dimensions of the shaft and sleeve, the type of load the joint will experience, and the desired level of interference. Consulting a fit tolerance chart or using specialized software can help determine the appropriate fit for your specific application.
Interference fits can be difficult to achieve and may require precision machining or specialized tools. Additionally, thermal expansion or contraction of the materials can alter the fit over time, and disassembly of the joint may be challenging.
There are several techniques that can be used to improve the interference fit, such as using lubricants or heating or cooling the components to adjust their dimensions. Additionally, selecting materials with compatible thermal expansion coefficients can help maintain the fit over time.