Guide / Tolerance Standards

Manufacturing Tolerance Conversion

Converting between international tolerance standards

ISO 2768 General Tolerances

Class	Description	0.5-3mm	3-6mm	6-30mm
f (fine)	Precision	+-0.05	+-0.05	+-0.1
m (medium)	General	+-0.1	+-0.1	+-0.2
c (coarse)	Rough	+-0.2	+-0.3	+-0.5
v (very coarse)	Very rough	-	+-0.5	+-1.0