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  		 ISO-Fundamental
Tolerance series		 Extract from Part 1
DIN ISO 286


Tolerances in m

Tol.- Nominal sizes
Grades   - > 3 > 6 > 10 > 18 > 30 > 50 > 80 > 120 > 180 > 250 > 315 > 400
IT ... 3 ... 6 ... 10 ... 18 ... 30 ... 50 ... 80 ... 120 ... 180 ... 250 ... 315 ... 400 ... 500
                           
01 0,3 0,4 0,4 0,5 0,6 0,6 0,8 1 1,2 2 2,5 3 4
 0 0,5 0,6 0,6 0,8 1 1 1,2 1,5 2 3 4 5 6
 1 0,8 1 1 1,2 1,5 1,5 2 2,5 3,5 4,5 6 7 8
                           
 2 1,2 1,5 1,5 2 2,5 2,5 3 4 5 7 8 9 10
 3 2 2,5 2,5 3 4 4 5 6 8 10 12 13 15
 4 3 4 4 5 6 7 8 10 12 14 16 18 20
                           
 5 4 5 6 8 9 11 13 15 18 20 23 25 27
 6 6 8 9 11 13 16 19 22 25 29 32 36 40
 7 10 12 15 18 21 25 30 35 40 46 52 57 63
                           
 8 14 18 22 27 33 39 46 54 63 72 81 89 97
 9 25 30 36 43 52 62 74 87 100 115 130 140 155
10 40 48 58 70 84 100 120 140 160 185 210 230 250
                           
11 60 75 90 110 130 160 190 220 250 290 320 360 400
12 100 120 150 180 210 250 300 350 400 460 520 570 630
13 140 180 220 270 330 390 460 540 630 720 810 890 970
                           
14 250 300 360 430 520 620 740 870 1000 1150 1300 1400 1550
15 400 480 580 700 840 1000 1200 1400 1600 1850 2100 2300 2500
16 600 750 900 1100 1300 1600 1900 2200 2500 2900 3200 3600 4000
                           
17 1000 1200 1500 1800 2100 2500 3000 3500 4000 4600 5200 5700 6300
18 1400 1800 2200 2700 3300 3900 4600 5400 6300 7200 8100 8900 9700
This ISO Standard represents the basis for a system of nominal dimensions and sizes whereby the table mirrors the calculated values of basic tolerances relating to basic dimensions.

The use of this table is limited to smooth circular cylindrical workpieces or such with two parallel fitting planes or contact areas.

The values attributed to an ISO tolerance grade (IT) specify the tolerance value and hence the tolerance area. With ascending numbers, the size of the tolerance increases.

For identification purposes of the position of the tolerance area in relation to the nominal dimension (zero), the number chosen as tolerance grade IT is preceded by a letter.

Tolerance area H is the most common value for bores. It specifies that the minimum dimension of the bore corresponds to the nominal dimension. The permissible maximum dimension corresponds to the nominal dimension plus the IT "tolerance.

Examples: bore 20 H7 = 20 + 0,021 / 0
min. dimension: 20,000
max. dimension: 20,021		 bore 8 H11 = 8 + 0,090 / 0
min. dimension: 8,000
max. dimension: 8,090


 ISO-fundamental tolerance series DIN ISO 286, select, inquiry, order, CAD downloadmetrisches iso-gewinde, toleranzfelder 6g/6h auszug din 13iso-passungen, auszug aus din iso 286 teil 2



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