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ISO Tolerances

ISO Shaft Limit Nearest Zero (Fundamental Deviation )Shaft size 0-500mm

Deviations in μmetres = (m-6)


Fundamental Deviatons a to j

Over Up -to (Incl.) Fundamental Deviation (es ) (ei )
a b c cd d e ef f fg g h js j5 j6 j7
  3 -270 -140 -60 -34 -20 -14 -10 -6 -4 -2 0 ITn/2 -2 -2 -4
3 6 -270 -140 -70 -46 -30 -20 -14 -10 -6 -4 0 ITn/2 -2 -2 -4
6 10 -280 -150 -80 -56 -40 -25 -18 -13 -8 -5 0 ITn/2 -2 -2 -5
10 14 -290 -150 -95   -50 -32   -16   -6 0 ITn/2 -3 -3 -6
14 18 -290 -150 -95   -50 -32   -16   -6 0 ITn/2 -3 -3 -6
18 24 -300 -160 -110   -65 -40   -20   -7 0 ITn/2 -3 -3 -8
24 30 -300 -160 -110   -65 -40   -20   -7 0 ITn/2 -3 -3 -8
30 40 -310 -170 -120   -80 -50   -25   -9 0 ITn/2 -4 -4 -10
40 50 -320 -180 -130   -80 -50   -25   -9 0 ITn/2 -4 -4 -10
50 65 -340 -190 -140   -100 -60   -30   -10 0 ITn/2 -5 -5 -12
65 80 -360 -200 -150   -100 -60   -30   -10 0 ITn/2 -7 -7 -12
80 100 -380 -220 -170   -120 -72   -36   -12 0 ITn/2 -9 -9 -15
100 120 -410 -240 -180   -120 -72   -36   -12 0 ITn/2 -9 -9 -15
120 140 -460 -260 -200   -145 -85   -43   -14 0 ITn/2 -11 -11 -18
140 160 -520 -280 -210   -145 -85   -43   -14 0 ITn/2 -11 -11 -18
160 180 -580 -310 -230   -145 -85   -43   -14 0 ITn/2 -11 -11 -18
180 200 -660 -340 -240   -170 -100   -50   -15 0 ITn/2 -13 -13 -21
200 225 -740 -380 -260   -170 -100   -50   -15 0 ITn/2 -13 -13 -21
225 250 -820 -420 -280   -170 -100   -50   -15 0 ITn/2 -13 -13 -21
250 280 -920 -480 -300   -190 -110   -56   -17 0 ITn/2 -16 -16 -26
280 315 -1050 -540 -330   -190 -110   -56   -17 0 ITn/2 -16 -16 -26
315 355 -1200 -600 -360   -210 -125   -62   -18 0 ITn/2 -18 -18 -28
355 400 -1350 -680 -400   -210 -125   -62   -18 0 ITn/2 -18 -18 -28
400 450 -1500 -760 -440   -230 -135   -68   -20 0 ITn/2 -20 -20 -32
450 500 -1650 -840 -480   -230 -135   -68   -20 0 ITn/2 -20 -20 -32
Over Up -to (Incl.) a b c cd d e ef f fg g h js j5 j6 j7
Fundamental Deviation (es ) (ei )


Fundamental Deviatons k to zc

Over Up to (Incl.) Fundamental Deviation ( ei )
k4-k7 (inc) other k m n p r s t u v x y z za zb zc
  3 0 0 2 4 6 10 14   18   20   26 32 40 60
3 6 1 0 4 8 12 15 19   23   28   35 42 50 80
6 10 1 0 6 10 15 19 23   28   34   42 52 67 97
10 14 1 0 7 12 18 23 28   33   40   50 64 90 130
14 18 1 0 7 12 18 23 28   33 39 45   60 77 108 150
18 24 2 0 8 15 22 28 35   41 47 54 63 73 98 136 188
24 30 2 0 8 15 22 28 35 41 48 55 64 75 88 118 160 218
30 40 2 0 9 17 26 34 43 48 60 68 80 94 112 148 200 274
40 50 2 0 9 17 26 34 43 54 70 81 97 114 136 180 242 325
50 65 2 0 11 20 32 41 53 66 87 102 122 144 172 226 300 405
65 80 2 0 11 20 32 43 59 75 102 120 146 174 210 274 360 480
80 100 3 0 13 23 37 51 71 91 124 146 178 214 258 335 445 585
100 120 3 0 13 23 37 54 79 104 144 172 210 254 310 400 525 690
120 140 3 0 15 27 43 63 92 122 170 202 248 300 365 470 620 800
140 160 3 0 15 27 43 65 100 134 190 228 280 340 415 535 700 900
160 180 3 0 15 27 43 68 108 146 210 252 310 380 465 600 780 1000
180 200 4 0 17 31 50 77 122 166 236 284 350 425 520 670 880 1150
200 225 4 0 17 31 50 80 130 180 258 310 385 470 575 740 960 1250
225 250 4 0 17 31 50 84 140 196 284 340 425 520 640 820 1050 1350
250 280 4 0 20 34 56 94 158 218 315 385 475 580 710 920 1200 1550
280 315 4 0 20 34 56 98 170 240 350 425 525 650 790 1000 1300 1700
315 355 4 0 21 37 62 108 190 268 390 475 590 730 900 1150 1500 1900
355 400 4 0 21 37 62 114 208 294 435 530 660 820 1000 1300 1650 2100
400 450 5 0 23 40 68 126 232 330 490 595 740 920 1100 1450 1850 2400
450 500 5 0 23 40 68 132 252 360 540 660 820 1000 1250 1600 2100 2600
Over Up to (Incl.) k4-k7 (inc) other k m n p r s t u v x y z za zb zc
Fundamental Deviation ( ei )

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Last Updated 17/07/2007