The insertion of one member into another whose diameter is slightly smaller than the part being inserted.
This is a fit having limits of size so prescribed that an interference always results when mating parts are assembled.
A condition of fit (contact) between two parts that requires pressure to force the parts together. Usually the shaft is slightly larger than the hole so that they must be pounded or forced or driven together. Also called " force fit," " press fit," or drive fit.
(n) A fit in which two toleranced mating parts will always interfere when assembled because the "male" part is larger than the "female" part. The resulting difference in sizes, also called the allowance, means that force is required to assemble the part. An interference fit fixes or anchors the two parts as if they were one.
The class of fit in which a mating part is deliberately made slightly oversize for the part into which it will be inserted.
This term is used in reference to valve springs. The inner spring is a very tight or push fit in the outer spring. This allows lower spring tension to be used. This type of spring requires lots of lubrication or spring breakage may occur.
A fit having limits of size, 0.0005 to 0.0007 inch (0.0127 to 0.0178 millimeters) so prescribed that an interference always results when mating parts are assembled by pressing them together. Also known as drive fit and interface fit.
Also called a drive fit, this very tight fit requires force to mate the parts.
An Interference fit (sometimes called a Press fit) is a fastening between two parts which is achieved by friction after the parts are pushed together, rather than by any other means of fastening. For metal parts in particular, the friction that holds the parts together is often greatly increased by compression of one part against the other, which relies on the tensile and compressive strengths of the material(s) the parts are made from. Typical examples of interference fits are the press fitting of shafts into bearings, or bearings into their housings, and the attachment of watertight connectors to cables.