ISO Tolerances

Nominal DimensionTolerance Zone in mm (External Measurements)
overtom6h6h8h10h11h13h14h15h16
01+0.002
+0.008
0
-0.006
0
-0.014
0
-0.040
0
-0.060
0
-0.14
   
13+0.002
+0.008
0
-0.006
0
-0.014
0
-0.040
0
-0.060
0
-0.14
0
-0.25
0
-0.40
0
-0.60
36+0.004
+0.012
0
-0.008
0
-0.018
0
-0.048
0
-0.075
0
-0.18
0
-0.30
0
-0.48
0
-0.75
610+0.006
+0.015
0
-0.009
0
-0.022
0
-0.058
0
-0.090
0
-0.22
0
-0.36
0
-0.58
0
-0.90
1018+0.007
+0.018
0
-0.011
0
-0.027
0
-0.070
0
-0.110
0
-0.27
0
-0.43
0
-0.70
0
-1.10
1830+0.008
+0.021
0
-0.030
0
-0.033
0
-0.084
0
-0.130
0
-0.33
0
-0.52
0
-0.84
0
-1.30
3050     0
-0.39
0
-0.62
0
-1.00
0
-1.60
5080     0
-0.46
0
-0.74
0
-1.20
0
-1.90
80120     0
-0.54
0
-0.87
0
-1.40
0
-2.20

 

Nominal DimensionTolerance Zone in mm (External Measurements)
overtojs14js15js16js17
13+0.125+0.20+0.30+0.50
36+0.15+0.24+0.375+0.60
610+0.18+0.29+0.45+0.75
1018+0.215+0.35+0.55+0.90
1830+0.26+0.42+0.65+1.05
3050+0.31+0.50+0.80+1.25
5080+0.37+0.60+0.95+1.50
80120+0.435+0.70+1.10+1.75
120180+0.50+0.80+1.25+2.00
180250+0.575+0.925+1.45+2.30
250315+0.65+1.05+1.60+2.60
315400+0.70+1.15+1.80+2.85
400500+0.775+1.25+2.00+3.15

 

Nominal DimensionTolerance Zone in mm (Internal Measurements)
overtoH7H8H9H11H13H14
01+0.010
0
+0.014
0
+0.025
0
+0.060
0
+0.14
0
 
13+0.010
0
+0.014
0
+0.025
0
+0.060
0
+0.14
0
+0.25
0
36+0.012
0
+0.018
0
+0.030
0
+0.075
0
+0.18
0
+0.30
0
610+0.015
0
+0.022
0
+0.036
0
+0.090
0
+0.22
0
+0.36
0
1018+0.018
0
+0.027
0
+0.043
0
+0.110
0
+0.27
0
+0.43
0
1830+0.021
0
+0.033
0
+0.052
0
+0.130
0
+0.33
0
+0.52
0
3050    +0.39
0
+0.62
0
5080    +0.46
0
+0.74
0
80120    +0.54
0
+0.87
0

Example limits and fits using hole basis
Description Hole Shaft
Loose Running
H11 c11
Free Running
H9 d9
Loose Running
H11 c11
Easy Running - Good quality easy to do-
H8 f8
Sliding
H7 g6
Close Clearance - Spigots and locations
H8 f7
Location/Clearance
H7 h6
Location- slight interference
H7 k6
Location/Transition
H7 n6
Location/Interference- Press fit which can be separated
H7 p6
Medium Drive
H7 s6
Force
H7 u6

Machining Process associated with ISO IT Tolerance Grade..
   
IT Grade
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Lapping
                             
Honing
                             
Superfinishing
                             
Cylinderical grinding
                             
Diamond turning
                             
Plan grinding
                            
Broaching
                            
Reaming
                             
Boring, Turning
                             
Sawing
                             
Milling
                             
Planing, Shaping
                             
Extruding
                             
Cold Rolling, Drawing
                             
Drilling
                             
Die Casting
                             
Forging
                             
Sand Casting
                             
Hot rolling, Flame cutting
                             

*All information is strictly informative