ISO 2768 Standard

Precision
class		 Linear Dimension Broken Angle
(chamfer or
radius)		 Angular Dimension (shortest
side)
>0.5 to
3
included		 >3
to 6		 >6
to
30		 >30
to
120		 >120
to
400		 >400
to
1000		 >1000
to
2000		 >2000
to
4000		 >0.5 to
3
included		 >3
to 6		 >6 ≤10 >10 to
50
included		 >50
to
120		 >120
to
400
f (fine) ± 0.05 ± 0.05 ± 0.1 ± 0.15 ± 0.2 ± 0.3 ± 0.5 — ± 0.2 ± 0.5 ± 1 ± 1° ± 30' ± 20' ± 10'
m
(medium)		 ± 0.1 ± 0.1 ± 0.2 ± 0.3 ± 0.5 ± 0.8 ± 1.2 ± 2 ± 0.2 ± 0.5 ± 1 ± 1° ± 30' ± 20' ± 10'
c (coarse) ± 0.2 ± 0.3 ± 0.5 ± 0.8 ± 1.2 ± 2 ± 3 ± 4 ± 0.4 ± 1 ± 2 ± 1°30' ± 1° ± 30' ± 15'
v (very
coarse)		 — ± 0.5 ± 1 ± 1.5 ± 2.5 ± 4 ± 6 ± 8 ± 0.4 ± 1 ± 2 ± 3° ± 2° ± 1° ± 30'

Geometric Tolerances mm

Precision
class		 Straightness - Flatness Perpendicularity Symmetry Run-out
Nominal Length (mm) Nominal Length (mm) Nominal Length (mm)
≤10 >10 to 30
included		 >30
to
100		 >100
to 300		 >300 to
1000		 ≤100 >100
to 300		 >300
to 1000		 ≤100 >100
to
300		 >300
to
1000		 —
H (fine) 0.02 0.06 0.1 0.2 0.3 0.2 0.3 0.4 0.5 0.5 0.5 0.1
K (medium) 0.05 0.1 0.2 0.4 0.6 0.4 0.6 0.8 0.6 0.6 0.8 0.2
L (coarse) 0.1 0.2 0.4 0.8 1.2 0.6 1 1.5 0.6 1 1.5 0.5