Table 9.

International tolerance grades for the circular artifact.

ISO 286 Standard Requirements		IT8	IT9	IT10	IT11
Max magnitude of the tolerance zone		25 i	40 i	64 i	100 i
Size range (10–18 mm), i = 1.083 μm		27 μm	43 μm	70 μm	109 μm
Collected values
n	Linear dimension (Height = 12 mm)	-	(32–42) μm	(44–69) μm	(73–75) μm
	Radial dimension (Diameter = 14.5 mm)	(19–24) μm	(28–41) μm	(47–57) μm	-