ISO 286 Single Feature Limits

mm
Upper Limit

0.000

+0.000
Lower Limit

0.000

-0.000
Standard +/- Deviation

ISO Machining Limits

+0.021
+0.000
Total Tolerance Zone: 0.021 mm
Machinist's Guide

Use these limits to setup your machine. For most applications, machinists aim for the Mean (Middle) of the tolerance zone.

Mean Target:

--

Setup your tool offset to this value for the highest safety margin.

Common Classes:
ClassUse Case
H7 / H8Standard Hole/Bore sizes.
g6 / f7Clearance shafts for sliding.
p6 / n6Interference (Press) fits.
js7 / js9Symmetric (+/-) tolerances.
Calculation follows ISO 286-1. All dimensions in millimeters (mm).