Interference fit
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An interference fit, also known as a press fit, force fit, or friction fit, is a form of fastening between two tightfitting mating parts that produces a joint which is held together by friction after the parts are pushed together. Depending on the amount of interference, parts may be joined using a tap from a hammer or forced together using a hydraulic press. Heating the outer part, or cooling the inner part may be used to shrink the inner part relative to the outer part. This method allows the components to be joined with less or no force and produces a shrink fit interference when the component returns to normal temperature. Interference fits are commonly used with aircraft fasteners to improve the fatigue life of a joint. These fits, though applicable to shaft and hole assembly, are more often used for bearing-housing or bearing-shaft assembly. This is referred to as a 'press-in' mounting.
An interference fit, also known as a press fit, force fit, or friction fit, is a form of fastening between two tightfitting mating parts that produces a joint which is held together by friction after the parts are pushed together. Depending on the amount of interference, parts may be joined using a tap from a hammer or forced together using a hydraulic press. Heating the outer part, or cooling the inner part may be used to shrink the inner part relative to the outer part. This method allows the components to be joined with less or no force and produces a shrink fit interference when the component returns to normal temperature. Interference fits are commonly used with aircraft fasteners to improve the fatigue life of a joint. These fits, though applicable to shaft and hole assembly, are more often used for bearing-housing or bearing-shaft assembly. This is referred to as a 'press-in' mounting.
Text derived from https://en.wikipedia.org/w/index.php?oldid=1368065015 under CC BY-SA 4.0; modifications have been made.