Ganter Norm Standard Parts - Catalogue Page 2151
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DIN ISO 286 ISO Fundamental Tolerances Extract Part 1 Numerical Values Nominal size range Tol. grades — >3 >6 IT …3 …6 … 10 01 0,3 0,4 0,4 > 10 … 18 0,5 > 18 … 30 0,6 > 30 … 50 0,6 > 50 > 80 … 80 … 120 0,8 1 > 120 > 180 … 180 … 250 1,2 2 > 250 > 315 … 315 … 400 2,5 3 > 400 … 500 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 2200 9700 Tolerances in μm Description Examples This ISO standard represents the basis for a system of limit dimensions and fits, whereby the table shows the calculated values of the fundamental tolerances in connection with the fundamental dimensions. Bore 20 H7 = 20 0 Min. dimension: 20,000 Max. dimension: 20,021 The use is limited to smooth circular cylindrical workpieces or those with two parallel fitting surfaces or contact planes. The numerical values assigned to an ISO tolerance grade (IT) specify the size of the tolerance and thus the tolerance field. With ascending number, the size of the tolerance increases. To indicate the position of the tolerance field in relation to the nominal dimension (zero), the number chosen as the tolerance grade IT is preceded by a letter. Tolerance field H is the most common one 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. Page 2150 | Extract from DIN / ISO Standard +0,021 +0,090 Bore 8 H11 = 8 0 Min. dimension: 8,000 Max. dimension: 8,090
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