The measured size of the dimension of a component is called:

Explanation:

Basic size:

• The basic size or normal size is the standard size for the part and is the same both for the hole and its shaft. This is the size that is obtained by calculation for strength.

Actual size: 

• Actual size is the dimension as measured on a manufactured part. As already mentioned, the actual size will never be equal to the basic size and it is sufficient if it is within predetermined limits.

Maximum Limit: 

• The maximum limit or high limit is the maximum size permitted for the part.

Minimum Limit: 

• The minimum limit or low limit is the minimum size permitted for the part.

Zero lines: 

• In the graphical representation of limits and fits, a zero line is a straight line to which the deviations are referred to. It is the line of zero deviation and represents the basic size.

Deviation: 

• It is the algebraic difference between size, to its corresponding basic size. It may be positive, negative or zero.
  • Upper deviation: It is the algebraic difference between the maximum limit of size and its corresponding basic size.
  • Lower deviation: It is the algebraic difference between the minimum limit of size and its corresponding basic size.
  • Fundamental deviation: This is the deviation, either the upper or lower deviation, which is the nearest one to zero line.
  • Tolerance is the difference between the upper limit and the lower limit of a dimension.