Nominal size mm  Fundamental deviation values
Upper limit deviation, es 
Lower deviation, ei
Above Up to
and
including
All standard tolerance grades IT5 and IT6 IT7 IT8
aa ba c cd d e ef f fg g h js j
- 3 -270 -140 -60 -34 -20 -14 -10 -6 -4 -2 0 Deviations = ±ITn/2,
where nis the standard
tolerance grade number
-2 -4 -6
3 6 -270 -140 -70 -46 -30 -20 -14 -10 -6 -4 0 -2 -4  
6 10 -280 -150 -80 -56 -40 -25 -18 -13 -8 -5 0 -2 -5  
10 14 -290 -150 -95 -70 -50 -32 -23 -16 -10 -6 0 -3 -6  
14 18 -300 -160 -110 -85 -258
18 24 -310 -170 -120 -100 -65 -40 -35 -20 -12 -7 0 -4 -8  
24 30 -320 -180 -130
30 40 -340 -190 -140   -80 -50   -25 -15 -9 0 -5 -10  
40 50 -360 -200 -150
50 65 -380 -220 -170   -100 -60   -30   -10 0 -7 -12  
65 80 -410 -240 -180
80 100 -460 -260 -200   -120 -72   -36   -12 0 -9 -15  
100 120 -520 -280 -210
120 140 -580 -310 -230   -145 -85   -43   -14 0 -11 -18  
140 160 -660 -340 -240
160 180 -740 -380 -260
180 200 -820 -420 -280   -170 -100   -50   -15 0 -13 -21  
200 225 -920 -480 -300
225 250 -1050 -540 -330
250 280 -1200 -600 -360   -190 -110   -56   -17 0 -16 -26  
280 315 -1350 -680 -400
315 355 -1500 -760 -440   -210 -125   -62   -18 0 -18 -28  
355 400 -1650 -840 -480
400 450         -230 -135   -68   -20 0 -20 -32  
450 500
500 560         -260 -145   -76   -22 0      
560 630
630 710         -290 -160   -80   -24 0      
710 800
800 900         -320 -170   -86   -26 0      
900 1000
1100 1120         -350 -195   -98   -28 0      
1120 1250
1250 1400         -390 -220   -110   -30 0      
1400 1600
1600 1800         -430 -240   -120   -32 0      
1800 2000
2000 2240         -480 -260   -130   -34 0      
2240 2500
2250 2800         -520 -290   -145   -38 0      
2800 3150

a.Fundamental deviations a and b shall not be used for nominal sizes u1 mm.

Tags: EN ISO 286-1 fundamental deviations for shafts a to j