Allowance in clearance fits - Metrology & Quality Control

Q.  What does allowance represent in clearance fits?
- Published on 07 Aug 15

a. It represents minimum clearance and is positive
b. It represents maximum clearance and is positive
c. It represents minimum clearance and is negative
d. It represents maximum clearance and is negative

ANSWER: It represents minimum clearance and is positive

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    Discussion

  • Anuj Kumar Soni   -Posted on 13 May 21
    ?
  • Sravanthi   -Posted on 26 Oct 15
    - Allowance is defined as the quantity obtained due the difference between LLH and ULS
    Allowance = (Lower limit hole – Upper limit shafts)

    - Allowance represents minimum clearance for clearance fits and is always positive. Clearance fits have positive difference between the size of hole and shaft. This clearance may be maximum or minimum.

    - Allowance represents maximum interference for interference fits and is always negative. In interference fits, two parts are fastened or pushed together by means of friction.

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