Machine processing and tolerance grades.
A tolerance is the total permissible variation of size. where the tolerance is the difference between the limits of size.
Range of tolerance grades that various machine processes may produce under normal conditions:
|Lapping and Honing|
|Planning and Shaping|
ANSI B4.1 Standard Tolerances are indicated in the diagram below:
- 1 in (inch) = 25.4 mm