Status of shaft & hole for interference fit - Metrology & Quality Control

Q.  Which of the following is true for interference fit?
- Published on 07 Aug 15

a. Shaft is always smaller than the hole
b. Shaft is always bigger than the hole
c. Interference fits have shaft and hole of same dimension
d. None of the above

ANSWER: Shaft is always bigger than the hole

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    Discussion

  • Sravanthi   -Posted on 26 Oct 15
    Interference fits: Transition fits are characterized by elastic strains, which develop in mating parts to prevent relative movement of parts after assembly.

    - In these fits shafts are bigger than holes. They require force or thermal expansion and contraction for assembly.

    Different types of interference fits are:

    1) Heavy force and shrink fit: Strong hold between mating parts can be achieved by using these fits and this fit involves maximum interference between mating parts.

    2) Medium force fit: This type of fit includes interference which involves large forces in assembling the components.

    3) Tight fit: Tight fit is used in assembling parts which are excepted to be maintained in a position. These fits involve certain amount of interference.

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