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Mechanical Engineering vocabulary · Tolerances and Measurement

Fit

Meaning in mechanical engineering, with examples

/fɪt/nounCommon term

In mechanical engineering, fit means: The relationship between the sizes of two parts that go together, such as a shaft and a hole, which decides whether they slide freely or are pressed tightly together.

In Turkish: geçme, alıştırma

How it is used

Used in design, drawings and assembly. There are clearance fits (there is always a gap), interference or press fits (the shaft is larger than the hole) and transition fits. ISO fits are written with codes such as H7/g6 or H7/p6.

Example sentences

  1. The bearing has an interference fit on the shaft, so it has to be heated before mounting.

  2. We changed the pin to a clearance fit because it was too hard to assemble.

Common collocations

  • clearance fit
  • interference fit
  • press fit
  • transition fit
  • H7/g6 fit
  • toleranceThe allowed amount of variation in a dimension or property, for example ±0.05 mm. A part is acceptable if its measured value falls inside this range.
  • bearingA machine element that supports a rotating or sliding part, such as a shaft, and reduces friction between the moving surfaces. Ball and roller bearings are the most common types.
  • shaftA long, round rotating part that carries gears, pulleys or wheels and transmits power and torque from one component to another.
  • assemblyA group of parts joined together to form a unit, or the process of putting parts together. A smaller unit inside it is called a subassembly.
  • dimensionA measurement of size or position on a part, such as a length, width, diameter or the distance between two holes, shown as a number on a drawing.

This word in other fields

The same English word can have a different meaning in another field:

More terms: Tolerances and Measurement

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