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ISO System of limits and fits

--- the English version of this webpage is under construction ---

Dit is de Engelstalige versie. Voor de Nederlandstalige versie, klik hier.

Explanation ISO System of limits and fits:
1. Introduction
2. Limits
3. Fits
4. Glossary

Limits of size (in μm) for holes and
shafts in range of 1 to 500 millimeter.

quickly jump to the right table
HOLESA to EF, G, Hj, jsK to RS to ZC
shaftsa to ef, g, hj, jsk to st to zc

Online calculator  

largest and smallest limits in μm for holes, tolerance grade A to E
nominal
size
in mm		ABCDE
aboveto 911 8911 8911 67891011 5678910
13 +295
+270		+330
+270		 +154
+140		+165
+140		+200
+140		 +74
+60		+85
+60		+120
+60		 +26
+20		+30
+20		+34
+20		+45
+20		+60
+20		+80
+20		 +18
+14		+20
+14		+24
+14		+28
+14		+39
+14		+54
+14
36 +300
+270		+345
+270		 +158
+140		+170
+140		+215
+140		 +88
+70		+100
+70		+145
+70		 +38
+30		+42
+30		+48
+30		+60
+30		+78
+30		+105
+30		 +25
+20		+28
+20		+32
+20		+38
+20		+50
+20		+68
+20
610 +316
+280		+370
+280		 +172
+150		+186
+150		+240
+150		 +102
+80		+116
+80		+170
+80		 +49
+40		+55
+40		+62
+40		+76
+40		+98
+40		+130
+40		 +31
+25		+34
+25		+40
+25		+47
+25		+61
+25		+83
+25
1018 +333
+290		+400
+290		 +177
+150		+193
+150		+260
+150		 +122
+95		+138
+95		+205
+95		 +61
+50		+68
+50		+77
+50		+93
+50		+120
+50		+160
+50		 +40
+32		+43
+32		+50
+32		+59
+32		+75
+32		+102
+32
1830 +352
+300		+430
+300		 +193
+160		+212
+160		+290
+160		 +143
+110		+162
+110		+240
+110		 +78
+65		+86
+65		+98
+65		+117
+65		+149
+65		+195
+65		 +49
+40		+53
+40		+61
+40		+73
+40		+92
+40		+124
+40
3040 +372
+310		+470
+310		 +209
+170		+232
+170		+330
+170		 +159
+120		+182
+120		+280
+120		 +96

+80		 +105

+80		 +119

+80		 +142

+80		 +180

+80		 +240

+80		 +61

+50		 +66

+50		 +75

+50		 +89

+50		 +112

+50		 +150

+50
4050 +382
+320		+480
+320		 +219
+180		+242
+180		+340
+180		 +169
+130		+192
+130		+290
+130
5065 +414
+340		+530
+340		 +236
+264		+264
+190		+380
+190		 +186
+140		+214
+140		+330
+140		 +119

+100		 +130

+100		 +146

+100		 +174

+100		 +220

+100		 +290

+100		 +73

+60		 +79

+60		 +90

+60		 +106

+60		 +134

+60		 +180

+60
6580 +434
+360		+550
+360		 +246
+200		+174
+200		+390
+200		 +196
+150		+224
+150		+340
+150
80100 +467
+380		+600
+380		 +274
+220		+307
+220		+440
+220		 +224
+170		+257
+170		+390
+170		 +142

+120		 +155

+120		 +174

+120		 +207

+120		 +260

+120		 +340

+120		 +87

+72		 +94

+72		 +107

+72		 +126

+72		 +159

+72		 +212

+72
100120 +497
+410		+630
+410		 +294
+240		+327
+240		+460
+240		 +234
+180		+267
+180		+400
+180
120140 +560
+460		+710
+460		 +323
+260		+360
+260		+510
+260		 +263
+200		+300
+200		+450
+200		 +170

+145		 +185

+145		 +208

+145		 +245

+145		 +305

+145		 +395

+145		 +103

+85		 +110

+85		 +125

+85		 +148

+85		 +185

+85		 +245

+85
140160 +620
+520		+770
+520		 +343
+280		+380
+280		+530
+280		 +273
+210		+310
+210		+460
+210
160180 +680
+580		+830
+580		 +373
+310		+410
+310		+560
+310		 +293
+230		+330
+230		+480
+230
180200 +775
+660		+950
+660		 +412
+340		+455
+340		+630
+340		 +312
+240		+355
+240		+530
+240		 +199

+170		 +216

+170		 +242

+170		 +285

+170		 +355

+170		 +460

+170		 +120

+100		 +129

+100		 +146

+100		 +172

+100		 +215

+100		 +285

+100
200225 +855
+740		+1030
+740		 +452
+380		+495
+380		+670
+380		 +332
+260		+375
+260		+550
+260
225250 +935
+820		+1110
+820		 +492
+420		+535
+420		+710
+420		 +352
+280		+395
+280		+570
+280
250280 +1050
+920		+1240
+920		 +561
+480		+610
+480		+800
+480		 +381
+300		+430
+300		+620
+300		 +222

+190		 +242

+190		 +271

+190		 +320

+190		 +400

+190		 +510

+190		 +133

+110		 +142

+110		 +162

+110		 +191

+110		 +240

+110		 +320

+110
280315 +1180
+1050		+1370
+1050		 +621
+540		+670
+540		+860
+540		 +411
+330		+460
+330		+650
+330
315355 +1340
+1200		+1560
+1300		 +689
+600		+740
+600		+960
+600		 +449
+360		+500
+360		+720
+360		 +246

++210		 +267

+210		 +299

+210		 +350

+210		 +440

+210		 +570

+210		 +150

+125		 +161

+125		 +182

+125		 +214

+125		 +256

+125		 +355

+125
355400 +1490
+1350		+1710
+1350		 +769
+680		+820
+680		+1040
+680		 +489
+400		+540
+400		+760
+400
400450 +1655
+1500		+1900
+1500		 +857
+760		+915
+760		+1160
+760		 +537
+440		+595
+440		+840
+440		 +270

+230		 +293

+230		 +327

+230		 +385

+230		 +480

+230		 +630

+230		 +162

+135		 +175

+135		 +198

+135		 +232

+135		 +290

+135		 +385

+135
450500 +1805
+1650		+2050
+1650		 +937
+840		+995
+840		+1240
+840		 +577
+480		+635
+480		+880
+480
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta
largest and smallest limits in μm for holes, tolerance grade F to H
nominal
size
in mm		FGH
aboveto 56789 567 12345678910111213141516
13 +10
+6		+12
+6		+16
+6		+20
+6		+31
+6		 +6
+2		+8
+2		+12
+2		 +0.8
0		+1.2
0		+2
0		+3
0		+4
0		+6
0		+10
0		+14
0		+25
0		+40
0		+60
0		+100
0		+140
0		+250
0		+400
0		+600
0
36 +15
+10		+18
+10		+22
+10		+28
+10		+40
+10		 +9
+4		+12
+4		+16
+4		 +1
0		+1.5
0		+2.5
0		+4
0		+5
0		+8
0		+12
0		+18
0		+30
0		+48
0		+75
0		+120
0		+180
0		+300
0		+480
0		+750
0
610 +19
+13		+22
+13		+28
+13		+35
+13		+49
+13		 +11
+5		+14
+5		+20
+5		 +1
0		+1.5
0		+2.5
0		+4
0		+6
0		+9
0		+15
0		+22
0		+36
0		+58
0		+90
0		+150
0		+220
0		+360
0		+580
0		+900
0
1018 +24
+16		+27
+16		+34
+16		+43
+16		+59
+16		 +14
+6		+17
+6		+24
+6		 +1.2
0		+2
0		+3
0		+5
0		+8
0		+11
0		+18
0		+27
0		+43
0		+70
0		+110
0		+180
0		+270
0		+430
0		+700
0		+1100
0
1830 +29
+20		+33
+20		+41
+20		+53
+20		+72
+20		 +16
+7		+20
+7		+28
+7		 +1.5
0		+2.5
0		+4
0		+6
0		+9
0		+13
0		+21
0		+33
0		+52
0		+84
0		+130
0		+210
0		+330
0		+520
0		+840
0		+1300
0
3050 +36
+20		+41
+25		+50
+25		+64
+25		+87
+25		 +20
+9		+25
+9		+34
+9		 +1.5
0		+2.5
0		+4
0		+7
0		+11
0		+16
0		+25
0		+39
0		+62
0		+100
0		+160
0		+250
0		+390
0		+620
0		+1000
0		+1600
0
5080 +43
+30		+49
+30		+60
+30		+76
+30		+104
+30		 +23
+10		+29
+10		+40
+10		 +2
0		+3
0		+5
0		+8
0		+13
0		+19
0		+30
0		+46
0		+74
0		+120
0		+190
0		+300
0		+460
0		+740
0		+1200
0		+1900
0
80120 +51
+36		+58
+36		+71
+36		+90
+36		+123
+36		 +27
+12		+34
+12		+47
+12		 +2.5
0		+4
0		+6
0		+10
0		+15
0		+22
0		+35
0		+54
0		+87
0		+140
0		+220
0		+350
0		+540
0		+870
0		+1400
0		+2200
0
120180 +61
+43		+68
+43		+83
+43		+106
+43		+143
+43		 +32
+14		+39
+14		+54
+14		 +3.5
0		+5
0		+8
0		+12
0		+18
0		+25
0		+40
0		+63
0		+100
0		+160
0		+250
0		+400
0		+630
0		+1000
0		+1600
0		+2500
0
180250 +70
+50		+79
+50		+96
+50		+122
+50		+165
+50		 +35
+15		+44
+15		+61
+15		 +4.5
0		+7
0		+10
0		+14
0		+20
0		+29
0		+46
0		+72
0		+115
0		+185
0		+290
0		+460
0		+720
0		+1150
0		+1850
0		+2900
0
250315 +79
+56		+88
+56		+108
+56		+137
+56		+186
+56		 +40
+17		+49
+17		+69
+17		 +6
0		+8
0		+12
0		+16
0		+23
0		+32
0		+52
0		+81
0		+130
0		+210
0		+320
0		+520
0		+810
0		+1300
0		+2100
0		+3200
0
315400 +87
+62		+98
+62		+119
+62		+151
+62		+202
+62		 +43
+18		+54
+18		+75
+18		 +7
0		+9
0		+13
0		+18
0		+25
0		+36
0		+57
0		+89
0		+140
0		+230
0		+360
0		+570
0		+890
0		+1400
0		+2300
0		+3600
0
400500 +95
+68		+108
+68		+131
+68		+165
+68		+223
+68		 +47
+20		+60
+20		+83
+20		 +8
0		+10
0		+15
0		+20
0		+27
0		+40
0		+63
0		+97
0		+155
0		+250
0		+400
0		+630
0		+970
0		+1550
0		+2500
0		+4000
0
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

largest and smallest limits in μm for holes, tolerance grade j and js
nominal
size
in mm		jjs
aboveto67812345678910111213141516
13 +2
-4		+4
-6		+6
-8		 +0.4
-0.4		+0.6
-0.6		+1
-1		+1.5
-1.5		+2
-2		+3
-3		+5
-5		+7
-7		+12.5
-12.5		+20
-20		+30
-30		+50
-50		+70
-70		+125
-125		+200
-200		+300
-300
36 +5
-3		+6
-6		+10
-8		 +0.5
-0.5		+0.75
-0.75		+1.25
-1.25		+2
-2		+2.5
-2.5		+4
-4		+6
-6		+9
-9		+15
-15		+24
-24		+37.5
-37.5		+60
-60		+90
-90		+150
-150		+240
-240		+375
-375
610 +5
-4		+8
-7		+12
-10		 +0.5
-0.5		+0.75
-0.75		+1.25
-1.25		+2
-2		+3
-3		+4.5
-4.5		+7.5
-7.5		+11
-11		+18
-18		+29
-29		+45
-45		+75
-75		+110
-110		+180
-180		+290
-290		+450
-450
1018 +6
-5		+10
-8		+15
-12		 +0.6
-0.6		+1
-1		+1.5
-1.5		+2.5
-2.5		+4
-4		+5.5
-5.5		+9
-9		+13.5
-13.5		+21.5
-21.5		+35
-35		+55
-55		+90
-90		+135
-135		+215
-215		+350
-350		+550
-550
1830 +8
-5		+12
-9		+20
-13		 +0.75
-0.75		+1.25
-1.25		+2
-2		+3
-3		+4.5
-4.5		+6.5
-6.5		+10.5
-10.5		+16.5
-16.5		+26
-26		+42
-42		+65
-65		+105
-105		+165
-165		+260
-260		+420
-420		+650
-650
3050 +10
-6		+14
-11		+24
-15		 +0.75
-0.75		+1.25
-1.25		+2
-2		+3.5
-3.5		+5.5
-5.5		+8
-8		+12.5
-12.5		+19.5
-19.5		+31
-31		+50
-50		+80
-80		+125
-125		+195
-195		+310
-310		+500
-500		+800
-800
5080 +13
-6		+18
-12		+28
-18		 +1
-1		+1.5
-1.5		+2.5
-2.5		+4
-4		+6.5
-6.5		+9.5
-9.5		+15
-15		+23
-23		+37
-37		+60
-60		+95
-95		+150
-150		+230
-230		+370
-370		+600
-600		+950
-950
80120 +16
-6		+22
-13		+34
-20		 +1.25
-1.25		+2
-2		+3
-3		+5
-5		+7.5
-7.5		+11
-11		+17.5
-17.5		+27
-27		+43.5
-43.5		+70
-70		+110
-110		+175
-175		+270
-270		+435
-435		+700
-700		+1100
-1100
120180 +18
-7		+26
-14		+41
-22		 +1.75
-1.75		+2.5
-2.5		+4
-4		+6
-6		+9
-9		+12.5
-12.5		+20
-20		+31.5
-31.5		+50
-50		+80
-80		+125
-125		+200
-200		+315
-315		+500
-500		+800
-800		+1250
-1250
180250 +22
-7		+30
-16		+47
-25		 +2.25
-2.25		+3.5
-3.5		+5
-5		+7
-7		+10
-10		+14.5
-14.5		+23
-23		+36
-36		+57.5
-57.5		+92.5
-92.5		+145
-145		+230
-230		+360
-360		+575
-575		+925
-925		+1450
-1450
250315 +25
-7		+36
-16		+55
-26		 +3
-3		+4
-4		+6
-6		+8
-8		+11.5
-11.5		+16
-16		+26
-26		+40.5
-40.5		+65
-65		+105
-105		+160
-160		+260
-260		+405
-405		+650
-650		+1050
-1050		+1600
-1600
315400 +29
-7		+39
-18		+60
-29		 +3.5
-3.5		+4.5
-4.5		+6.5
-6.5		+9
-9		+12.5
-12.5		+18
-18		+28.5
-28.5		+44.5
-44.5		+70
-70		+115
-115		+180
-180		+285
-285		+445
-445		+700
-700		+1150
-1150		+1800
-1800
400500 +33
-7		+43
-20		+66
-31		 +4
-4		+5
-5		+7.5
-7.5		+10
-10		+13.5
-13.5		+20
-20		+31.5
-31.5		+48.5
-48.5		+77.5
-77.5		+125
-125		+200
-200		+315
-315		+485
-485		+775
-775		+1250
-1250		+2000
-2000
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

largest and smallest limits in μm for holes, tolerance grade K to R
nominal
size
in mm		 K M N P R
aboveto5678 5678 567891011 56789 5678
13 0
-4		0
-6		0
-10		0
-14		 -2
-6		-2
-8		-2
-12		- -4
-8		-4
-10		-4
-14		-4
-18		-4
-29		-4
-44		-4
-64		 -6
-10		-6
-12		-6
-16		-6
-20		-6
-31		 -10
-14		-10
-16		-10
-20		-10
-24
36 0
-5		+2
-6		+3
-9		+5
-13		 -3
-8		-1
-9		0
-12		+2
-16		 -7
-12		-5
-13		-4
-16		-2
-20		0
-30		0
-48		0
-75		 -11
-16		-9
-17		-8
-20		-12
-30		-12
-42		 -14
-19		-12
-20		-11
-23		-15
-33
610 +1
-5		+2
-7		+5
-10		+6
-16		 -4
-10		-3
-12		0
-15		+1
-21		 -8
-14		-7
-16		-4
-19		-3
-25		0
-36		0
-58		0
-90		 -13
-19		-12
-21		-9
-24		-15
-37		-15
-51		 -17
-23		-16
-25		-13
-28		-19
-41
1018 +2
-6		+2
-9		+6
-12		+8
-19		 -4
-12		-4
-15		0
-18		+2
-25		 -9
-17		-9
-20		-5
-23		-3
-30		0
-43		0
-70		0
-110		 -15
-23		-15
-26		-11
-29		-18
-45		-18
-61		 -20
-28		-20
-31		-16
-34		-23
-50
1830 +1
-8		+2
-11		+6
-15		+10
-23		 -5
-14		-4
-17		0
-21		+4
-29		 -12
-21		-11
-24		-7
-28		-3
-36		0
-52		0
-84		0
130		 -19
-28		-18
-31		-14
-35		-22
-55		-22
-74		 -25
-34		-24
-37		-20
-41		-28
-61
3050 +2
-9		+3
-13		+7
-18		+12
-27		 -5
-16		-4
-20		0
-25		+5
-34		 -13
-24		-12
-28		-8
-33		-3
-42		0
-62		0
-100		0
-160		 -22
-33		-21
-37		-17
-42		-26
-65		-26
-88		 -30
-41		-29
-45		-25
-50		-34
-73
5065 +3

-10		+4

-15		+9

-21		+14

-32		 -6

-19		-5

-24		0

-30		+5

-41		 -15

-28		-14

-33		-9

-39		-4

-50		0

-74		0

-120		0

-190		 -27

-40		-26

-45		-21

-51		-32

-78		-32

-106		 -36
-49		-35
-54		-30
-60		-41
-87
6580 -38
-51		-37
-56		-32
-62		-43
-89
80100 +2

-13		+4

-18		+10

-25		+16

-38		 -8

-23		-6

-28		0

-35		+6

-48		 -18

-33		-16

-38		-10

-45		-4

-58		0

-87		0

-140		0

-220		 -32

-47		-30

-52		-24

-59		-37

-91		-37

-124		 -46
-61		-44
-66		-38
-73		-51
-105
100120 -49
-64		-47
-69		-41
-76		-54
-108
120140 +3

-15		+4

-21		+12

-28		+20

-43		 -9

-27		-8

-33		0

-40		+8

-55		 -21

-39		-20

-45		-12

-52		-4

-67		0

-100		0

-160		0

-250		 -37

-55		-36

-61		-28

-68		-43

-106		-43

-143		 -57
-75		-56
-81		-48
-88		-63
-126
140160 -59
-77		-58
-83		-50
-90		-65
-128
160180 -62
-80		-61
-86		-53
-93		-68
-131
180200 +2

-18		+5

-24		+13

-33		+22

-50		 -11

-31		-8

-37		0

-46		+9

-63		 -25

-45		-22

-51		-14

-60		-5

-77		0

-115		0

-185		0

-290		 -44

-64		-41

-70		-33

-79		-50

-122		-50

-165		 -71
-91		-68
-97		-60
-106		-77
-149
200225 -74
-94		-71
-100		-63
-109		-80
-152
225250 -78
-98		-75
-104		-67
-113		-84
-156
250280 +3

-20		+5

-27		+16

-36		+25

-56		 -13

-36		-9

-41		0

-52		+9

-72		 -27

-50		-25

-57		-14

-66		-5

-86		0

-130		0

-210		0

-320		 -49

-72		-47

-79		-36

-88		-56

-137		-56

-186		 -87
-110		-85
-117		-74
-126		-94
-175
280315 -91
-114		-89
-121		-78
-130		-98
-179
315355 +3

-22		+7

-29		+17

-40		+28

-61		 -14

-39		-10

-46		0

-57		+11

-78		 -30

-55		-26

-62		-16

-73		-5

-94		0

-140		0

-230		0

-360		 -55

-80		-51

-87		-41

-98		-62

-151		-62

-202		 -101
-126		-97
-133		-87
-144		-108
-197
355400 -107
-132		-103
-139		-93
-150		-114
-203
400450 +2

-25		+8

-32		+18

-45		+29

-68		 -16

-43		-10

-50		0

-63		+11

-86		 -33

-60		-27

-67		-17

-80		-6

-103		0

-155		0

-250		0

-400		 -61

-88		-55

-95		-45

-108		-68

-165		-68

-223		 -119
-146		-113
-153		-103
-166		-126
-223
450500 -125
-152		-119
-159		-109
-172		-132
-229
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

nominal
size
in mm
largest and smallest limits in μm for holes, tolerance grade S to ZC
S T U V X Y Z ZA ZB ZC
aboveto 567 67 67 67 67 7 78 78 89 89
13 -14
-18		-14
-20		14
-24		 -- -18
-24		-18
-28		 -- -20
-26		-20
-30		 - -26
-36		-26
-40		 -32
-42		-32
-46		 -40
-54		-40
-65		 -60
-74		-60
-85
36 -18
-23		-16
-24		-15
-27		 -- -20
-28		-19
-31		 -- -25
-33		-24
-36		 - -31
-43		-35
-53		 -38
-50		-42
-60		 -50
-68		-50
-80		 -80
-98		-80
-110
610 -21
-27		-20
-29		-17
-32		 -- -25
-34		-22
-37		 -- -31
-40		-28
-43		 - -36
-51		-42
-64		 -46
-61		-52
-74		 -67
-89		-67
-103		 -97
-119		-97
-133
1014 -25

-33		-25

-36		-21

-39		 -- -30

-41		-26

-44		 -- -37
-48		-33
-51		 - -43
-61		-50
-77
1418 -36
-77		-32
-50		 -42
-53		-38
-56		 - -53
-71		-60
-87
1824 -32

-41		-31

-44		-27

-48		 -- -37
-50		-33
-54		 -43
-56		-39
-60		 -50
-63		-46
-67		 -55
-76		 -65
-86		-73
-106
2430 -37
-50		-33
-54		 -44
-57		-40
-61		 -51
-64		-47
-68		 -60
-73		-56
-77		 -67
-88		 -80
-101		-88
-121
3040 -39

-50		-38

-54		-34

-59		 -43
-59		-39
-64		 -55
-71		-51
-76		 -63
-79		-59
-84		 -75
-91		-71
-96		 -85
-110		 -103
-128		-112
-151
4050 -49
-65		-45
-70		 -65
-81		-61
-86		 -76
-92		-72
-97		 -92
-108		-88
-113		 -105
-130		 -127
-152		-136
-175
5065 -48
-61		-47
-66		-42
-72		 -60
-79		-55
-85		 -81
-100		-76
-106		 -96
-115		-91
-121		 -116
-135		-111
-141		 -133
-163		 -161
-191		-172
-218
6580 -54
-67		-53
-72		-48
-78		 -69
-88		-64
-94		 -96
-115		-91
-121		 -114
-133		-109
-139		 -140
-159		-135
-165		 -163
-193		 -199
-229		-210
-256
80100 -66
-81		-64
-86		-58
-93		 -84
-106		-78
-113		 -117
-139		-111
-146		 -139
-161		-133
-168		 -171
-193		-165
-200		 -201
-236		 -245
-280		-258
-312
100120 -74
-89		-72
-94		-66
-101		 -97
-119		-91
-126		 -137
-159		-131
-166		 -165
-187		-159
-194		 -203
-225		-197
-232		 -241
-276		 -297
-332		-310
-364
120140 -86
-104		-85
-110		-77
-117		 -115
-140		-107
-147		 -163
-188		-155
-195		 -195
-220		-187
-227		 -241
-266		-233
-273		 -285
-325		 -350
-390		-365
-428
140160 -94
-112		-93
-118		-85
-125		 -127
-152		-119
-159		 -138
-208		-175
-215		 -221
-246		-213
-253		 -273
-298		-265
-305		 -325
-365		 -400
-440		-415
-478
160180 -102
-120		-101
-126		-93
-133		 -139
-164		-131
-171		 -203
-228		-195
-235		 -245
-270		-237
-277		 -303
-328		-295
-335		 -365
-405		 -450
-490		-465
-528
180200 -116
-136		-113
-142		-105
-151		 -157
-186		-149
-195		 -227
-256		-219
-265		 -275
-304		-267
-313		 -341
-370		-333
-379		 -408
-454		 -503
-549		-520
-592
200225 -124
-144		-121
-150		-113
-159		 -171
-200		-163
-209		 -249
-278		-241
-287		 -301
-330		-293
-339		 -376
-405		-368
-414		 -453
-499		 -558
-604		-575
-647
225250 -134
-154		-131
-160		-123
-169		 -187
-216		-179
-225		 -275
-304		-267
-313		 -331
-360		-323
-369		 -416
-445		-408
-454		 -503
-549		 -623
-669		-640
-712
250280 -151
-174		-149
-181		-138
-190		 -209
-241		-198
-250		 -306
-338		-295
-347		 -376
-408		-365
-417		 -466
-498		-455
-507		 -560
-612		 -690
-742		-710
-791
280315 -163
-186		-161
-193		-150
-202		 -231
-263		-220
-272		 -341
-373		-330
-382		 -416
-448		-405
-457		 -516
-548		-505
-557		 -630
-682		 -770
-822		-790
-871
315355 -183
-208		-179
-215		-169
-226		 -257
-293		-247
-304		 -379
-415		-369
-426		 -464
-500		-454
-511		 -579
-615		-569
-626		 -709
-766		 -879
-936		-900
-989
355400 -201
-226		-197
-233		-187
-244		 -283
-319		-273
-330		 -424
-460		-414
-471		 -519
-555		-509
-566		 -649
-685		-639
-696		 -799
-856		 -979
-1036		-1000
-1089
400450 -225
-252		-219
-259		-209
-272		 -317
-357		-307
-370		 -477
-517		-467
-530		 -582
-622		-572
-635		 -727
-767		-717
-780		 -897
-960		 -1077
-1140		-1100
-1197
450500 -245
-272		-239
-279		-229
-292		 -347
-387		-337
-400		 -527
-567		-517
-580		 -647
-687		-637
-700		 -807
-847		-797
-860		 -977
-1040		 -1227
-1290		-1250
-1347
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

largest and smallest limits in μm for shafs, tolerance grade a to e
nominal
size
in mm		abcde
aboveto 911 8911 8911 567891011 56789
13 -270
-295		-270
-330		 -140
-154		-140
-165		-140
-200		 -60
-74		-60
-85		-60
-120		 -20
-24		-20
-26		-20
-30		-20
34-		-20
-45		-20
-60		-20
-80		 -14
-18		-14
-20		-14
-24		-14
-28		-14
-39
36 -270
-300		-270
-345		 -140
-158		-140
-170		-140
-215		 -70
-88		-70
-100		-70
-145		 -30
-35		-30
-38		-30
-42		-30
-48		-30
-60		-30
-78		-30
-105		 -20
-25		-20
-28		-20
-32		-20
-38		-20
-50
610 -280
-316		-280
-370		 -150
-172		-150
-186		-150
-240		 -80
-102		-80
-116		-80
-170		 -40
-46		-40
-49		-40
-55		-40
-62		-40
-76		-40
-98		-40
-130		 -25
-31		-25
-34		-25
-40		-25
-47		-25
-61
1018 -290
-333		-290
-400		 -150
-177		-150
-193		-150
-260		 -95
-122		-95
-138		-95
-205		 -50
-58		-50
-61		-50
-68		-50
-77		-50
-93		-50
-120		-50
-160		 -32
-40		-32
-43		-32
-50		-32
-59		-32
-75
1830 -300
-352		-300
-430		 -160
-193		-160
-212		-160
-290		 -110
-143		-110
-162		-110
-240		 -65
-74		-65
-78		-65
-86		-65
-98		-65
-117		-65
-149		-65
-195		 -40
-49		-40
-53		-40
-61		-40
-73		-40
-92
3040 -310
-372		-310
-470		 -170
-209		-170
-232		-170
-330		 -120
-159		-120
-182		-120
-280		 -80

-91		-80

-96		-80

-105		-80

-119		-80

-142		-80

-180		-80

-240		 -50

-61		-50

-66		-50

-75		-50

-89		-50

-112
4050 -320
-382		-320
-480		 -180
-219		-180
-242		-180
-340		 -130
-169		-130
-192		-130
-290
5065 -340
-414		-340
-530		 -190
-236		-190
-264		-190
-380		 -140
-186		-140
-214		-140
-330		 -100

-113		-100

-119		-100

-130		-100

-146		-100

-174		-100

-220		-100

-290		 -60

-73		-60

-79		-60

-90		-60

-106		-60

-134
6580 -360
-434		-360
-550		 -200
-246		-200
-274		-200
-390		 -150
-196		-150
-224		-150
-340
80100 -380
-467		-380
-600		 -220
-274		-220
-307		-220
-440		 -170
-224		-170
-257		-170
-390		 -120

-135		-120

-142		-120

-155		-120

-174		-120

-207		-120

-260		-120

-340		 -72

-87		-72

-94		-72

-107		-72

-126		-72

-159
100120 -410
-497		-410
-630		 -240
-294		-240
-327		-240
-460		 -180
-234		-180
-267		-180
-400
120140 -460
-560		-460
-710		 -260
-323		-260
-360		-260
-510		 -200
-263		-200
-300		-200
-450		 -145

-163		-145

-170		-145

-185		-145

-208		-145

-245		-145

-305		-145

-395		 -85

-103		-85

-110		-85

-125		-85

-148		-85

-185
140160 -520
-620		-520
-770		 -280
-343		-280
-380		-280
-530		 -210
-273		-210
-310		-210
-460
160180 -580
-680		-580
-830		 -310
-373		-310
-410		-310
-560		 -230
-293		-230
-330		-230
-480
180200 -660
-775		-660
-950		 -340
-412		-340
-455		-340
-630		 -240
-312		-240
-355		-240
-530		 -170

-190		-170

-199		-170

-216		-170

-242		-170

-285		-170

-355		-170

-460		 -100

-120		-100

-129		-100

-146		-100

-172		-100

-215
200225 -740
-855		-740
-1030		 -380
-452		-380
-495		-380
-670		 -260
-332		-260
-375		-260
-550
225250 -820
-935		-820
-1110		 -420
-492		-420
-535		-420
-710		 -280
-352		-280
-395		-280
-570
250280 -920
-1050		-920
-1240		 -480
-561		-480
-610		-480
-800		 -300
-381		-300
-430		-300
-620		 -190

-213		-190

-222		-190

-242		-190

-271		-190

-320		-190

-400		-190

-510		 -110

-133		-110

-142		-110

-162		-110

-191		-110

-240
280315 -1050
-1180		-1050
-1370		 -540
-621		-540
-670		-540
-860		 -330
-411		-330
-460		-330
-650
315355 -1200
-1340		-1200
-1560		 -600
-689		-600
-740		-600
-960		 -360
-449		-360
-500		-360
-720		 -210

-235		-210

-246		-210

-267		-210

-299		-210

-350		-210

-440		-210

-570		 -125

-150		-125

-161		-125

-182		-125

-214		-125

-265
355400 -1350
-1490		-1350
-1710		 -680
-769		-680
-820		-680
-1040		 -400
-489		-400
-540		-400
-760
400450 -1500
-1655		-1500
-1900		 -760
-857		-760
-915		-760
-1160		 -440
-537		-440
-595		-440
-840		 -230

-257		-230

-270		-230

-293		-230

-327		-230

-385		-230

-480		-230

-630		 -135

-162		-135

-175		-135

-198		-135

-232		-135

-290
450500 -1650
-1805		-1650
-2050		 -840
-937		-840
-995		-840
-1240		 -480
-577		-480
-635		-480
-880
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta
largest and smallest limits in μm for shafts, tolerance grade f to h
nominal
size
in mm		fgh
aboveto 456789 4567 12345678910111213141516
13 -6
-9		-6
-10		-6
-12		-6
-16		-6
-20		-6
-31		 -2
-5		-2
-6		-2
-8		-2
-12		 0
-0.8		0
-1.2		0
-2		0
-3		0
-4		0
-6		0
-10		0
-14		0
-25		0
-40		0
-60		0
-100		0
-140		0
-250		0
-400		0
-600
36 -10
-14		-10
-15		-10
-18		-10
-22		-10
-28		-10
-40		 -4
-8		-4
-9		-4
-12		-4
-16		 0
-1		0
-1.5		0
-2.5		0
-4		0
-5		0
-8		0
-12		0
-18		0
-30		0
-48		0
-75		0
-120		0
-180		0
-300		0
-480		0
-750
610 -13
-17		-13
-19		-13
-22		-13
-28		-13
-35		-13
-49		 -5
-9		-5
-11		-5
-14		-5
-20		 0
-1		0
-1.5		0
-2.5		0
-4		0
-6		0
-9		0
-15		0
-22		0
-36		0
-58		0
-90		0
-150		0
-220		0
-360		0
-580		0
-900
1018 -16
-21		-16
-24		-16
-27		-16
-34		-16
-43		-16
-59		 -6
-11		-6
-14		-6
-17		-6
-24		 0
-1.2		0
-2		0
-3		0
-5		0
-8		0
-11		0
-18		0
-27		0
-43		0
-70		0
-110		0
-180		0
-270		0
-430		0
-700		0
-1100
1830 -20
-26		-20
-29		-20
-33		-20
-41		-20
-53		-20
-72		 -7
-13		-7
-16		-7
-20		-7
-28		 0
-1.5		0
-2.5		0
-4		0
-6		0
-9		0
-13		0
-21		0
-33		0
-52		0
-84		0
-130		0
-210		0
-330		0
-520		0
-840		0
-1300
3050 -25
-32		-25
-36		-25
-41		-25
-50		-25
-64		-25
-87		 -9
-16		-9
-20		-9
-25		-9
-34		 0
-1.5		0
-2.5		0
-4		0
-7		0
-11		0
-16		0
-25		0
-39		0
-62		0
-100		0
-160		0
-250		0
-390		0
-620		0
-1000		0
-1600
5080 -30
-38		-30
-43		-30
-49		-30
-60		-30
-76		-30
-104		 -10
-18		-10
-23		-10
-29		-10
-40		 0
-2		0
-3		0
-5		0
-8		0
-13		0
-19		0
-30		0
-46		0
-74		0
-120		0
-190		0
-300		0
-460		0
-740		0
-1200		0
-1900
80120 -36
-46		-36
-51		-36
-58		-36
-71		-36
-90		-36
-123		 -12
-22		-12
-27		-12
-34		-12
-47		 0
-2.5		0
-4		0
-6		0
-10		0
-15		0
-22		0
-35		0
-54		0
-87		0
-140		0
-220		0
-350		0
-540		0
-870		0
-1400		0
-2200
120180 -43
-55		-43
-61		-43
-68		-43
-83		-43
-106		-43
-143		 -14
-26		-14
-32		-14
-39		-14
-54		 0
-3.5		0
-5		0
-8		0
-12		0
-18		0
-25		0
-40		0
-63		0
-100		0
-160		0
-250		0
-400		0
-630		0
-1000		0
-1600		0
-2500
180250 -50
-64		-50
-70		-50
-79		-50
-96		-50
-122		-50
-165		 -15
-29		-15
-35		-15
-44		-15
-61		 0
-4.5		0
-7		0
-10		0
-14		0
-20		0
-29		0
-46		0
-72		0
-115		0
-185		0
-290		0
-460		0
-720		0
-1150		0
-1850		0
-2900
250315 -56
-72		-56
-79		-56
-88		-56
-108		-56
-137		-56
-186		 -17
-33		-17
-40		-17
-49		-17
-69		 0
-6		0
-8		0
-12		0
-16		0
-23		0
-32		0
-52		0
-81		0
-130		0
-210		0
-320		0
-520		0
-810		0
-1300		0
-2100		0
-3200
315400 -62
-80		-62
-87		-62
-98		-62
-119		-62
-151		-62
-202		 -18
-36		-18
-43		-18
-54		-18
-75		 0
-7		0
-9		0
-13		0
-18		0
-25		0
-36		0
-57		0
-89		0
-140		0
-230		0
-360		0
-570		0
-890		0
-1400		0
-2300		0
-3600
400500 -68
-88		-68
-95		-68
-108		-68
-131		-68
-165		-68
-223		 -20
-40		-20
-47		-20
-60		-20
-83		 0
-8		0
-10		0
-15		0
-20		0
-27		0
-40		0
-63		0
-97		0
-155		0
-250		0
-400		0
-630		0
-970		0
-1550		0
-2500		0
-4000
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

largest and smallest limits in μm for shafs, tolerance grade j and js
nominal
size
in mm		jjs
aboveto56712345678910111213141516
13 +2
-2		+4
-2		+6
-4		 +0.4
-0.4		+0.6
-0.6		+1
-1		+1.5
-1.5		+2
-2		+3
-3		+5
-5		+7
-7		+12.5
-12.5		+20
-20		+30
-30		+50
-50		+70
-70		+125
-125		+200
-200		+300
-300
36 +3
-2		+6
-2		+8
-4		 +0.5
-0.5		+0.75
-0.75		+1.25
-1.25		+2
-2		+2.5
-2.5		+4
-4		+6
-6		+9
-9		+15
-15		+24
-24		+37.5
-37.5		+60
-60		+90
-90		+150
-150		+240
-240		+375
-375
610 +4
-2		+7
-2		+10
-5		 +0.5
-0.5		+0.75
-0.75		+1.25
-1.25		+2
-2		+3
-3		+4.5
-4.5		+7.5
-7.5		+11
-11		+18
-18		+29
-29		+45
-45		+75
-75		+110
-110		+180
-180		+290
-290		+450
-450
1018 +5
-3		+8
-3		+12
-6		 +0.6
-0.6		+1
-1		+1.5
-1.5		+2.5
-2.5		+4
-4		+5.5
-5.5		+9
-9		+13.5
-13.5		+21.5
-21.5		+35
-35		+55
-55		+90
-90		+135
-135		+215
-215		+350
-350		+550
-550
1830 +5
-4		+9
-4		+13
-8		 +0.75
-0.75		+1.25
-1.25		+2
-2		+3
-3		+4.5
-4.5		+6.5
-6.5		+10.5
-10.5		+16.5
-16.5		+26
-26		+42
-42		+65
-65		+105
-105		+165
-165		+260
-260		+420
-420		+650
-650
3050 +6
-5		+11
-5		+15
-10		 +0.75
-0.75		+1.25
-1.25		+2
-2		+3.5
-3.5		+5.5
-5.5		+8
-8		+12.5
-12.5		+19.5
-19.5		+31
-31		+50
-50		+80
-80		+125
-125		+195
-195		+310
-310		+500
-500		+800
-800
5080 +6
-7		+12
-7		+18
-12		 +1
-1		+1.5
-1.5		+2.5
-2.5		+4
-4		+6.5
-6.5		+9.5
-9.5		+15
-15		+23
-23		+37
-37		+60
-60		+95
-95		+150
-150		+230
-230		+370
-370		+600
-600		+950
-950
80120 +6
-9		+13
-9		+20
-15		 +1.25
-1.25		+2
-2		+3
-3		+5
-5		+7.5
-7.5		+11
-11		+17.5
-17.5		+27
-27		+43.5
-43.5		+70
-70		+110
-110		+175
-175		+270
-270		+435
-435		+700
-700		+1100
-1100
120180 +7
-11		+14
-11		+22
-18		 +1.75
-1.75		+2.5
-2.5		+4
-4		+6
-6		+9
-9		+12.5
-12.5		+20
-20		+31.5
-31.5		+50
-50		+80
-80		+125
-125		+200
-200		+315
-315		+500
-500		+800
-800		+1250
-1250
180250 +7
-13		+16
-13		+25
-21		 +2.25
-2.25		+3.5
-3.5		+5
-5		+7
-7		+10
-10		+14.5
-14.5		+23
-23		+36
-36		+57.5
-57.5		+92.5
-92.5		+145
-145		+230
-230		+360
-360		+575
-575		+925
-925		+1450
-1450
250315 +7
-16		+16
-16		+26
-26		 +3
-3		+4
-4		+6
-6		+8
-8		+11.5
-11.5		+16
-16		+26
-26		+40.5
-40.5		+65
-65		+105
-105		+160
-160		+260
-260		+405
-405		+650
-650		+1050
-1050		+1600
-1600
315400 +7
-18		+18
-18		+29
-28		 +3.5
-3.5		+4.5
-4.5		+6.5
-6.5		+9
-9		+12.5
-12.5		+18
-18		+28.5
-28.5		+44.5
-44.5		+70
-70		+115
-115		+180
-180		+285
-285		+445
-445		+700
-700		+1150
-1150		+1800
-1800
400500 +7
-20		+20
-20		+31
-32		 +4
-4		+5
-5		+7.5
-7.5		+10
-10		+13.5
-13.5		+20
-20		+31.5
-31.5		+48.5
-48.5		+77.5
-77.5		+125
-125		+200
-200		+315
-315		+485
-485		+775
-775		+1250
-1250		+2000
-2000
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

largest and smallest limits in μm for shafts, tolerance grade k to s
nominal
size
in mm		 k m n p r s
aboveto 4567 4567 4567 4567 4567 4567
13 +3
0		+4
0		+6
0		+10
0		 +5
+2		+6
+2		+8
+2		- +7
+4		+8
+4		+10
+4		+14
+4		 +9
+6		+10
+6		+12
+6		+16
+6		 +13
+10		+14
+10		+16
+10		+20
+10		 +17
+14		+18
+14		+20
+14		+24
+14
36 +5
+1		+6
+1		+9
+1		+13
+1		 +8
+4		+9
+4		+12
+4		+16
+4		 +12
+8		+13
+8		+16
+8		+20
+8		 +16
+12		+17
+12		+20
+12		+24
+12		 +19
+15		+20
+15		+23
+15		+27
+15		 +23
+19		+24
+19		+27
+19		+31
+19
610 +5
+1		+7
+1		+10
+1		+16
+1		 +10
+6		+12
+6		+15
+6		+21
+6		 +14
+10		+16
+10		+19
+10		+25
+10		 +19
+15		+21
+15		+24
+15		+30
+15		 +23
+19		+25
+19		+28
+19		+34
+19		 +27
+23		+29
+23		+32
+23		+38
+23
1018 +6
+1		+9
+1		+12
+1		+19
+1		 +12
+7		+15
+7		+18
+7		+25
+7		 +17
+12		+20
+12		+23
+12		+30
+12		 +23
+18		+26
+18		+29
+18		+36
+18		 +28
+23		+31
+23		+34
+23		+41
+23		 +33
+28		+36
+28		+39
+28		+46
+28
1830 +8
+2		+11
+2		+15
+2		+23
+2		 +14
+8		+17
+8		+21
+8		+29
+8		 +21
+15		+24
+15		+28
+15		+36
+15		 +28
+22		+31
+22		+35
+22		+43
+22		 +34
+28		+37
+28		+41
+28		+49
+28		 +41
+35		+44
+35		+48
+35		+56
+35
3050 +9
+2		+13
+2		+18
+2		+27
+2		 +16
+9		+20
+9		+25
+9		+34
+9		 +24
+17		+28
+17		+33
+17		+42
+17		 +33
+26		+37
+26		+42
+26		+51
+26		 +41
+34		+45
+34		+50
+34		+59
+34		 +50
+43		+54
+43		+59
+43		+68
+43
5065 +10

+2		+15

+2		+21

+2		+32

+2		 +19

+11		+24

+11		+30

+11		+41

+11		 +28

+20		+33

+20		+39

+20		+50

+20		 +40

+32		+45

+32		+51

+32		+62

+32		 +49
+41		+54
+41		+60
+41		+71
+41		 +61
+53		+66
+53		+72
+53		+83
+53
6580 +51
+43		+56
+43		+62
+43		+73
+43		 +67
+59		+72
+59		+78
+59		+89
+59
80100 +13

+3		+18

+3		+25

+3		+38

+3		 +23

+13		+28

+13		+35

+13		+48

+13		 +33

+23		+38

+23		+45

+23		+58

+23		 +47

+37		+52

+37		+59

+37		+72

+37		 +61
+51		+66
+51		+73
+51		+86
+51		 +81
+71		+86
+71		+93
+71		+106
+71
100120 +64
+54		+69
+54		+76
+54		+89
+54		 +89
+79		+94
+79		+101
+79		+114
+79
120140 +15

+3		+21

+3		+28

+3		+43

+3		 +27

+15		+33

+15		+40

+15		+55

+15		 +39

+27		+45

+27		+52

+27		+67

+27		 +55

+43		+61

+43		+68

+43		+83

+43		 +75
+63		+81
+63		+88
+63		+103
+63		 +104
+92		+110
+92		+117
+92		+132
+92
140160 +77
+65		+83
+65		+90
+65		+105
+65		 +112
+100		+118
+100		+125
+100		+140
+100
160180 +80
+68		+86
+68		+93
+68		+108
+68		 +120
+108		+126
+108		+133
+108		+148
+108
180200 +18

+4		+24

+4		+33

+4		+50

+4		 +31

+17		+37

+17		+46

+17		+63

+17		 +45

+31		+51

+31		+60

+31		+77

+31		 +64

+50		+70

+50		+79

+50		+96

+50		 +91
+77		+97
+77		+106
+77		+123
+77		 +136
+122		+142
+122		+151
+122		+168
+122
200225 +94
+80		+100
+80		+109
+80		+126
+80		 +144
+130		+150
+130		+159
+130		+176
+130
225250 +98
+84		+104
+84		+113
+84		+130
+84		 +154
+140		+160
+140		+169
+140		+186
+140
250280 +20

+4		+27

+4		+36

+4		+56

+4		 +36

+20		+43

+20		+52

+20		+72

+20		 +50

+34		+57

+34		+66

+34		+86

+34		 +72

+56		+79

+56		+88

+56		+108

+56		 +110
+94		+117
+94		+126
+94		+146
+94		 +174
+158		+181
+158		+190
+158		+210
+158
280315 +114
+98		+121
+98		+130
+98		+150
+98		 +186
+170		+193
+170		+202
+170		+222
+170
315355 +22

+4		+29

+4		+40

+4		+61

+4		 +39

+21		+46

+21		+57

+21		+78

+21		 +55

+37		+62

+37		+73

+37		+94

+37		 +80

+62		+87

+62		+98

+62		+119

+62		 +126
+108		+133
+108		+144
+108		+165
+108		 +208
+190		+215
+190		+226
+190		+247
+190
355400 +132
+114		+139
+114		+150
+114		+171
+114		 +226
+208		+233
+208		+244
+208		+265
+208
400450 +25

+5		+32

+5		+45

+5		+68

+5		 +43

+23		+50

+23		+63

+23		+86

+23		 +60

+40		+67

+40		+80

+40		+103

+40		 +88

+68		+95

+68		+108

+68		+131

+68		 +146
+126		+153
+126		+166
+126		+189
+126		 +252
+232		+259
+232		+272
+232		+295
+232
450500 +152
+132		+159
+132		+172
+132		+195
+132		 +272
+252		+279
+252		+292
+252		+315
+252
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

largest and smallest limits in μm for shafts, tolerance grade t to zc
nominal
size
in mm		 t u v x y z za zb zc
bovent ⁄ m 567 5678 567 5678 67 67 67 78 78
13 --- +22
+18		+24
+18		+28
+18		+32
+18		 --- +24
+20		+26
+20		+30
+20		+34
+20		 -- +32
+26		+36
+26		 +38
+32		+42
+32		 +50
+40		+54
+40		 +70
+60		+74
+60
36 --- +28
+23		+31
+23		+35
+23		+41
+23		 --- +33
+28		+36
+28		+40
+28		+46
+28		 -- +43
+35		+47
+35		 +50
+42		+54
+42		 +62
+50		+68
+50		 +92
+80		+98
+80
610 --- +34
+28		+37
+28		+43
+28		+50
+28		 --- +40
+34		+43
+34		+49
+34		+56
+34		 -- +51
+42		+57
+42		 +61
+52		+67
+52		 +82
+67		+89
+67		 +112
+97		+119
+97
1014 --- +41
+33		+44
+33		+51
+33		+60
+33		 --- +48
+40		+51
+40		+58
+40		+67
+40		 -- +61
+50		+68
+50		         
1418 --- +41
+33		+44
+33		+51
+33		+60
+33		 +47
+39		+50
+39		+57
+39		 +53
+45		+56
+45		+63
+45		+72
+45		 -- +71
+60		+78
+60		         
1824 --- +50
+41		+54
+41		+62
+41		+74
+41		 +56
+47		+60
+47		+68
+47		 +63
+54		+67
+54		+75
+54		+87
+54		 +76
+63		+84
+63		 +86
+73		+94
+73		         
2430 +50
+41		+54
+41		+62
+41		 +57
+48		+61
+48		+69
+48		+81
+48		 +64
+55		+68
+55		+76
+55		 +73
+64		+77
+64		+85
+64		+97
+64		 +88
+75		+96
+75		 +101
+88		+109
+88		         
3040 +59
+48		+64
+48		+73
+48		 +71
+60		+76
+60		+85
+60		+99
+60		 +79
+68		+84
+68		+93
+68		 +91
+80		+96
+80		+105
+80		+119
+80		 +110
+94		+119
+94		 +128
+112		+137
+112		         
4050 +65
+54		+70
+54		+79
+54		 +81
+70		+86
+70		+95
+70		+109
+70		 +92
+81		+97
+81		+106
+81		 +108
+97		+113
+97		+122
+97		+136
+97		 +130
+114		+139
+114		 +152
+136		+161
+136		         
5065 +79
+66		+85
+66		+96
+66		 +100
+87		+106
+87		+117
+87		+133
+87		 +115
+102		+121
+102		+132
+102		 +135
+122		+141
+122		+152
+122		+168
+122		 +163
+144		+174
+144		 +191
+172		+202
+172		         
6580 +88
+75		+94
+75		+105
+75		 +115
+102		+121
+102		+132
+102		+148
+102		 +133
+120		+139
+120		+150
+120		 +159
+146		+165
+146		+176
+146		+192
+146		 +193
+174		+204
+174		 +229
+210		+240
+210		         
80100 +106
+91		+113
+91		+126
+91		 +139
+124		+146
+124		+159
+124		+178
+124		 +161
+146		+168
+146		+181
+146		 +193
+178		+200
+178		+213
+178		+232
+178		 +236
+214		+249
+214		 +280
+258		+293
+258		         
100120 +119
+104		+126
+104		+139
+104		 +159
+144		+166
+144		+179
+144		+198
+144		 +187
+172		+194
+172		+207
+172		 +225
+210		+232
+210		+245
+210		+264
+210		 +276
+254		+289
+254		 +332
+310		+345
+310		         
120140 +140
+122		+147
+122		+162
+122		 +188
+170		+195
+170		+210
+170		+233
+170		 +220
+202		+227
+202		+242
+202		 +266
+248		+273
+248		+288
+248		+311
+248		 +325
+300		+340
+300		 +390
+365		+405
+365		         
140160 +152
+134		+159
+134		+174
+134		 +208
+190		+215
+190		+230
+190		+253
+190		 +246
+228		+253
+228		+268
+228		 +298
+280		+305
+280		+320
+280		+343
+280		 +365
+340		+380
+340		 +440
+415		+455
+415		         
160180 +164
+146		+171
+146		+186
+146		 +228
+210		+235
+210		+250
+210		+273
+210		 +270
+252		+277
+252		+292
+252		 +328
+310		+335
+310		+350
+310		+373
+310		 +405
+380		+420
+380		 +490
+465		+505
+465		         
180200 +186
+166		+195
+166		+212
+166		 +256
+236		+265
+236		+282
+236		+308
+284		 +304
+284		+313
+284		+330
+284		 +370
+350		+379
+350		+396
+350		+422
+350		 +454
+425		+471
+425		 +549
+520		+566
+520		         
200225 +200
+180		+209
+180		+226
+180		 +278
+258		+287
+258		+304
+258		+330
+258		 +330
+310		+339
+310		+356
+310		 +405
+385		+414
+385		+431
+385		+457
+385		 +499
+470		+516
+470		 +604
+575		+621
+575		         
225250 +216
+196		+225
+196		+242
+196		 +304
+284		+313
+284		+330
+284		+356
+284		 +360
+340		+369
+340		+386
+340		 +445
+425		+454
+425		+471
+425		+497
+425		 +549
+520		+566
+520		 +669
+640		+686
+640		         
250280 +241
+218		+250
+218		+270
+218		 +338
+315		+347
+315		+367
+315		+396
+315		 +408
+385		+417
+385		+437
+385		 +498
+475		+507
+475		+527
+475		+556
+475		 +612
+580		+632
+580		 +742
+710		+762
+710		         
280315 +263
+240		+272
+240		+292
+240		 +373
+350		+382
+350		+402
+350		+431
+350		 +448
+425		+457
+425		+477
+425		 +548
+525		+557
+525		+577
+525		+606
+525		 +682
+650		+702
+650		 +822
+790		+842
+790		         
315355 +293
+268		+304
+268		+325
+268		 +415
+390		+426
+390		+447
+390		+479
+390		 +500
+475		+511
+475		+532
+475		 +615
+590		+626
+590		+647
+590		+679
+590		 +766
+730		+787
+730		 +936
+900		+957
+900		         
355400 +319
+294		+330
+294		+351
+294		 +460
+435		+471
+435		+492
+435		+524
+435		 +555
+530		+566
+530		+587
+530		 +685
+660		+696
+660		+717
+660		+749
+660		 +856
+820		+877
+820		 +1036
+1000		+1057
+1000		         
400450 +357
+330		+370
+330		+393
+330		 +517
+490		+530
+490		+553
+490		+587
+490		 +622
+595		+635
+595		+658
+595		 +767
+740		+780
+740		+803
+740		+837
+740		 +960
+920		+983
+920		 +1140
+1100		+1163
+1100		         
450500 +387
+360		+400
+360		+423
+360		 +567
+540		+580
+540		+603
+540		+637
+540		 +687
+660		+700
+660		+723
+660		 +847
+820		+860
+820		+883
+820		+917
+820		 +1040
+1000		+1063
+1000		 +1290
+1250		+1313
+1250		         
Disclaimer: no rights can be derived from this information. Use of this information is at your own risk.
Is the tolerance you are looking for not listed? This online calculator calculates all limit deviations.

© Mark Nauta

Content

1. Introduction
2. Limits
     2.1 Fundamental deviation
     2.2 Tolerance grade
     2.3 ?
     2.4 Calculation of limits
     2.5 Check of limits
3. Fit
     3.1 Introduction
     3.2
     3.3 Shaft- and hole-basis fit
4. Glossary
 

© Mark Nauta

1. Introduction

Limits

Tolerances are present in various aspects of our daily lives. One example is the '℮' sign, also known as the estimated sign or e-mark, commonly found on packaging. This symbol signifies that the weight of the contents is an approximation rather than an exact measurement. For instance, at 150 grams, the deviation may be as high as 4.5%.
Another instance can be found in a car's speedometer. It's practically impossible for a driver to maintain an exact speed of 55 mph due to numerous factors, such as variations in tire pressure, which affect speed measurements. Consequently, speed measurements often indicate a value that is 5 to 10 percent higher than reality to be on the sfae side.

Tolerances also come into play during product manufacturing. Each step in the production process introduces variation, making it impossible to create identical products or adhere precisely to the nominal specifications. Therefore, it is not possible to make every product exactly the same as all other products made, nor is it possible to make the product exactly according to the (nominal) specification.

To address this variation, designers define acceptable limits, known as tolerances, which indicate how much deviation is permissible ("tolerate" meaning "allow").

When a designer selects a narrow tolerance range, more parts will fall outside these limits due to inherent variations. Consequently, a greater number of parts will be rejected, leading to higher costs per approved part. The inverse relationship also holds true: increasing tolerance leads to fewer failures and lower costs..
tolerance↑ → failure↓ → price↓ and:
tolerance↓ → failure↑ → price↑ 

This is the designer's dilemma: how can the tolerances be chosen so broadly, so that the function of the part is still satisfactory ?

This also applies to mechanical engineering. There it is not possible to make a workpiece according to the specified dimensions. Therefore, a tolerance is specified on the workpiece drawing in addition to the nominal size. These tolerances have been established and standardized internationally. A simple reference to this standard on a drawing is sufficient to make it clear to all those involved (constructor, manufacturer, end user, etc.) what the requirements are for the workpiece wrt dimensions.

 

Fits

A part almost never stands alone; it often forms a composition with other parts. It is important that the parts fit together properly. A combination of (the tolerance of) two parts is referred to as a fit. These fits are also standardized in the ISO Fitting System.

 
Besides the fact that not every product has to be the same, the big advantage of fits is that it helps with the interchangeability of parts.
For example, a manufacturer can design an assembly himself on paper, have the parts made or purchased from different suppliers, and then assemble them without any problems, or use them for service or maintenance.

 
The photo on the right is of the Ford assembly line from 1913 where parts could be assembled without 'fitting'. Henri Ford announces: 'there are no files in my factory!' Compare this with the situation before mass production where each part had to be made to fit the other parts when assembled.

 
 

© Mark Nauta

2. :Limits

In the ISO Fitting System, tolerances are indicated using the nominal size, the fundamental deviation, and the tolerance grade.
• Nominal size: this is the size with which the product is designed
• Fundamental deviation: determines the lower limit of the permitted deviation. Is identified by a letter, a lower case letter for an inner boundary ("axis") or an upper case letter for an outer boundary ("hole"). The letter also indicates the tolerance direction (in positive direction ("larger"), negative direction, or symmetrical)
• Tolerance grade: determines the size of the permitted deviation. Indicated by a number, the number indicates the degree of quality (a low number indicates an accurate tolerance, a higher number indicates a wider tolerance)

Example: '12 G6': nominal size = '12'; fundamental deviation identifier = 'G'; tolerance grade = '6'.
 
The limits can be looked up in the tables above:
• the fundamental deviation identifier 'G' shows that table 'holes, F to H' is applicable.
• in this table, the left two columns show that for a nominal size of 12, group  'above 10, to 18' is applicable.
• in this group, the upper and lower limit of G6 can be read: '+6' en '+17' (μm) resp.
>>> thus, the limits of '12 G6' are 12.006 en 12.017 .

limits 12 G6

The fundamental deviation and tolerance grade will be discussed in the next paragraphs.

 

2.1 Fundamental deviation

As explained above, the Fundamental deviation determines:
- the lower limit
- the direction of the deviation
 
On a drawing, the Fundamental deviation is indicated by means of a character:
- a lower case letter for an inner limit ("shaft"), or
- an upper case letter for an outer limit ("hole")
 
In the norm the actual values are documented; the table below is shortened and copied from the norm:

Fundamental deviation (-indicator) in μm
nominal sizeIndicator
abovetoABC...GH...M...P...Z
13+270+140+60...+20...-2...-6...-26
36+270+140+70...+40...-4...-12...-35
610+280+150+80...+50...-6...-15...-42
1014+290+150+95...+60...-7...-18...-50
..........................................
355400+1350+680+400...+180...-21...-62...-1000
400450+1500+740+440...+200...-23...-68...-1100
450500+1650+840+480...+200...-23...-68...-1250

It is noticeable from this table that the size deviation depends on the size of the nominal size, namely: "the larger the product, the greater the size deviation".
 
The figure below shows this graphically. It shows the Fundamental deviations of two shafts (∅100mm and ∅200mm respectively).

figuur 2: Fundamental deviations of two shafts(∅100mm (left) and ∅200mm (right)

 

2.2 Tolerance grade

The tolerance grade determines the 'width' of the allowed deviation
 
On drawing this is indicated by a number, in the previous example '12 G6' this is '6'.
 
A lower number means more accurate, a higher number less accurate:
• 1-4: very accurate
• 5-11: accurate and plain
• 12-16: rough
 
The (shortened) table below is taken from the norm:

tolerance in μm
nominal sizeTolerance grade IT
aboveto010123...678....1516
130.30.50.81.23...61014....400600
360.40.611.53...81218....480750
6100.40.611.53...91522....580900
10180.50.81.223...111827....7001100
..........................................
2503152.54683...325281....21003200
31540035793...365789....23003600
400500468103...406397....25004000

It is noticeable from this table that the tolerance depends on the the nominal size, in this way: "the larger the product, the greater the tolerance". And this corresponds to the intuitive feeling that something larger can be made less precise.
 
In fact, the tolerance class is the accuracy of the machining operation, and therefore largely determines the type of machining.
The table below indicates which operation can be used to achieve a certain tolerance:

Machine operation vs. Tolerance grade
 IT grade
↓operation2345678910111213141516
lapping++++           
honing +++           
super finish  +++          
cylindrical grinding  ++++         
diamond turning  ++++         
surface grinding   +++++       
broaching   +++++       
reaming   +++++       
turning, boring    +++++++    
sawing       +++     
milling       +++++   
extruding        ++++   
boring         ++++  
injection molding          ++++ 
forging           ++++
die casting            +++
rolling, cutting            +++
 
 

2.3 Limits

In summary, the limits are determined by the combination of the Fundamental deviation, and tolerance grade:
• Fundamental deviation: determines the lower limit, and direction (positive/negative/symmetric
• tolerance grade: determines the magnitude of the tolerance
• the absolute (lower- and upper-) limits are dependent on the nominal size
 
The picture below can make this clear (tip: 'read' from left to right):

the ultimate limits are dependent on the nominal size

 

2.4 Looking up the limits

When te nominal size, fundamental deviation, and tolerance grade are known, the limits can be lookep up.
As an example: '10 P8'
a. search in the table above: row 'size group 6 tp 10', column 'P' >>>fundamentall deviation -15 μm
b. search in the table above: row 'size group 6 to 10', column '8' >>>tolerace 22 μm
c. >>> limits -15 μm and (-15-22=) -37 μm, which evaluates to 9.985 to 9.963 mm
 
For this specific example, the limits can be directly looked up in the table(s) with most used limits: : see table.
 
Another way to lookup the limits is by meands of a 'Tolerator', this is a handy tool to find the most used limits, by turning a knob.

figuur 4: de tolerator

Of course the limits can also be found digitally: this with this online calculator.
 
 

2.5 Check on limits

To verify if the feature fits the limits can be achieved with measurement tools like calipers. There are also check tools specifically for tolerances: gauges. With a gauge it can be quickly checked whether the dimensions are correct: 'right or wrong'.
 
Properties of a gauge:
• a gauge is feature-specific, so it is suitable for one application, eg 'hole'.
• a gauge is also size-related, so it is suitable for one tolerance, e.g. '20 H7'.
The gauge has an approval and rejection side. The reject side can usually be recognized by a red mark.
 
Examples of gauges:

plug gauge for checking a hole

snap gauge for checking a shaft

The use is quite simple. Both sides of the gauge should be tested. The feature does not meet the limits if:
• the gauge does not fit on the approval side (the shape is too small); or:
• the gauge does fit on the rejection side (then the shape is too large)

a gauge shows approval or rejection in an easy way

The advantages and disadvantages of gauges follow from their properties:
Advantages: fast, easy to use, little can go wrong, also checks for shape deviations (e.g. roundness of a hole)
Disadvantages: expensive to purchase, shape and size dependent so large sets are required, must be periodically calibrated, actual dimensions of the shape to be checked are unknown

 
 

© Mark Nauta

3. Fits 3.1 Introduction

When combining a shaft and a hole, automatically the question arises: will it fit ?
The nature of the fit is determined by the clearance between the shaft and the hole: with a positive clearance the shaft is smaller than the hole, and with a negative clearance the shaft is larger than the hole.

positive or negative clearance

If the maximum limit of a shaft is smaller than the minimum limit of a hole, it is referred to as a clearance fit.
If the minimum limit of a shaft is larger than the maximum limit of a hole, it is referred to as a transition fit.
If there is a potential positive or negative clearance, it is referred to as an interference fit.

clearance, transition and interference fit


Depending on the application, a specific type of fit is chosen.
For a sliding application, for example a piston-cylinder combination, a clearance fit will be chosen.
If the parts need to remain in place, but can still be removed afterwards, for example a bearing in a bearing housing, then a transition fit will be chosen.
If the parts must be inextricably connected to each other, and even be able to transmit/resist forces, an interference fit will be chosen.

 
 

3.2 Preferred fits

In theory, it is possible to conceive of any imaginable (exotic) fit, but in practice, this is undesirable and even unnecessary. Unnecessary because a limited number of combinations of shafts and holes have proven sufficient for the majority of structural problems. Undesirable because anyone applying a fit tends to rely on established principles.
The most commonly used fits, or combinations of shaft and hole tolerances, are referred to as preferred fits.
The table below provides an overview of preferred fits. Please note that preferred fits apparently remain independent (!) of the nominal size:

clearance fit
shaft-
basis
fit		h5h6h7(h8)h9h11
G6-H6F7-G7-H7E8-F8-G8-H8D9-E9-F9-H9D10-E10-F10-H10B11-C11-D11-E11-F11-H11
hole-
basis-
fit		H6H7H8(H9)(H10)H11
g5-h5f6-g6-h6e7-f7-g7-h7d8-e8-f8-h8d9-e9-f9-h9b11-c11-d11-e11-f11-h11
 
transitional fit
shaft-
basis
fit		h5h6h7
J6-K6-M6-N6J7-K7-M7-N7J8-K8-M8-N8
hole-
basis-
fit		H6H7H8
j5-k5-m5-n5j6-k6-m6-n6j7-k7-m7-n7
 
interference fit
shaft-
basis
fit		h5h6h7
P6-R6-S6-T6P7-R7-S7-T7-U7R8-T8-U8
hole-
basis-
fit		H6H7H8
p5-r5-s5-t5p6-r6-s6-t6-u6s7-t7-u7
remark: between brackets means less common; bold means pravailed
De schrijfwijze wordt dan (bijvoorbeeld): '52 h7/F8' oftewel een combinatie van een as 52 h7 met gat 52 F8.

From the table above can be read that combination h7-F8 is a prevailed, clearance fit.
Elaborate:
• find shaft '52 h7' in table: limits 51,970 en 52,000
• find hole '52 F8' in table: limits 52,030 en 52,076
So in this case, it is a clearance fit, met minimum play +0,030 and maximum play +0,106 (mm)
('smallest possible hole minus largest possible shaft' resp. 'larget posible hole minus smallest possible shaft')

 

3. hole-basis and shaft-basis fit

The table above mentions 'hole-basis fit' and 'shaft-basis fit', these are preferred fits where the fundamental deviation of the hole (resp. shaft) is zero. The counterpart can be 'freely' chosen.

hole-basis fit vs shaft-basis fit

In the table below some preference fits are given with an application:
Type of
fit		shaft-basit
fit		hole-basis
fit		application
example
clearance
fits		H6/h5H6/h5gear on shaft
G7/h6H7/g6piston and cylinder
F8/h7H8/f7machine tool spindles
regulator bearings
sliding rods
D10/h9H10/d9bearings in agricultural machines
C11/h11H11/c11pivots
latches
transitional
fits		J7/h6
K7/h6
N7/h6		H7/j6
H7/k6
H7/n6		retaining rings
easy dismountable bearings
J8/h7H8/j7frequently removed bearing bushes
interference
fits		P7/h6
S7/h6		H7/p6
H7/s6		seated bearing bushes
parts without retaining

The picture below gives a graphical representation:

on the left: in the hole-basis fit system, the hole has a fundamental deviation of zero ('H') and the counterpart is 'free';
on the right: in the shaft-basis fit system, the shaft has a fundamental deviation of zero ('h') and the counterpart is 'free';

Example of a transitional fit: '20 H7/k6' in other words a combination of a hole 20 H7 with shaft 20 k6.
Elaboration:
• look up hole '20 H7' in the table: limit sizes 20.000 and 20.021
• look up shaft '20 k6' in the table: limit sizes 20.002 and 20.015
Therefore it is a transitional fit, with minimum clearance -0.015 and maximum clearance +0.019 (mm)

 

© Mark Nauta

4. Glossary

Remark: where is stated 'shaft', is also meant 'inner limits'; where stated 'hole', is also meant 'outer limits'
terminologydescriptionexplanation
Basic size, Nominal sizethe perfect size of a designed feature link
Fitplay between a hole and a shaft link
Clearance fitfit where the largest deviation of the hole will always fit he smallest deviation of the shaft link
Interference fitfit where the smallest deviation of the hole will never fit he largest deviation of the shaft link
Transition fitfit with a possible or negative play link
Playdifference between the actual inner- and outer size link
Minimum, maximum limits,
Limits of size		extreme permissible sizes of a feature link
Tolerancespread between the largest and smallest limits of size link
Tolerance intervalthe zone between lower- and upper limit of size link
Deviationactual value minus its nominal size link
Fundamental deviation (-identifier)the lower limit deviation (=lying closest to the nominal size). On drawing, this is denoted by a lower case letter for a shaft, or an upper case letter for a hole link
Tolerance directiondirection of the tolerance wrt. the nominal size, can be either ('larger') or negative ('smaller') of symmetric link
Tolerance grade (-number)a characteristic of the accuracy of the operation link
Gaugetool to determine (dis-)approval. A gauge is applicable for one shape and one tolerance link
Shaft-basis fitfit (combination of shaft and hole), where the fundamental deviation of the shaft is zero (in short: 'h'); counterpart (hole) differs link
Hole-basis fitfit (combination of shaft and hole), where the fundamental deviation of the hole is zero (in short: 'H'); counterpart (shaft) differs link
 
 

© Mark Nauta

5. References, links

• the ISO norm: ISO 286-1 or ISO 286-1
 
 

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