Page 450 - CATÁLOGO DE ROSCADO

MACHOS DE ROSCAR Dimensiones Nominales de las Roscas Unificadas de Paso Normal
Según Norma ANSI B1.1

Tolerancias de fabricación del Diámetro de Flanco Dimensiones de Roscas de
de los machos para ISO 2B Límite de dimensiones Paso Normal en mm
de roscas de tuercas - ANSI B1.1, 2B-3B

Nut thread 1/8·H H = 0.86603P

1/2·H H1 = 5 H = 0.54127P
H 8
H1 17
1/2·H 1/4·H r 60° h3 h3 = 24 H = 0.61343P

60° d2 = D2 = d- 3 H = d-0.64952P
Screw1/6·H 4

d3 = d-2h3 = d-1.22687P

D D2 D1 P d3 d2 d r = H = 0.14434P
6

Tolerancia de
los Machos Tolerancia de la
Diám. Diámetro Mínimo Para el Tuerca Para el
Diám. Nominal Paso Diám. en el Diámetro de Diámetro de Flanco
HxP P Exterior Flanco Flanco 2B
d2=D2
d=D
1.598
1.890 Tuerca Tornillo Min. Máx. máx. máx. máx.
2.172 D1 h3 2B/3B 2B 3B
2.433
UNC#1 - 64 0.397 1.854 2.764 1.425 1.367 1.610 1.623 1.598 1.664 1.646
UNC# 2 - 64 0.454 2.184 2.990 1.694 1.628
UNC#3 - 48 0.529 2.515 3.650 1.941 1.864 1.902 1.915 1.890 1.961 1.943
UNC# 4 - 40 0.635 2.845 4.138 2.156 2.065
UNC# 5 - 40 0.635 3.175 4.798 2.487 2.395 2.184 2.197 2.172 2.248 2.228
UNC# 6 - 32 0.794 3.505 5.524 2.647 2.532
UNC# 8 - 32 0.794 4.166 7.021 3.307 3.193 2.446 2.459 2.433 2.517 2.494
UNC# 10 - 24 1.058 4.826 8.494 3.680 3.528
UNC# 12 - 24 1.058 5.486 9.934 4.341 4.188 2.776 2.789 2.764 2.847 2.827
UNC 1/4” - 20 1.270 6.350 11.430 4.976 4.793
UNC 5/16” - 18 1.411 7.938 12.913 6.411 6.205 3.105 3.028 2.990 3.084 3.058
UNC 3/8” - 16 1.588 9.525 14.376 7.805 7.577
UNC 7/16” - 14 1.814 11.112 17.399 9.149 8.887 3.675 3.688 3.650 3.746 3.721
UNC 1/2” - 13 1.954 12.700 20.391 10.584 10.302
UNC 9/16” - 12 2.117 14.288 23.338 11.996 11.692 4.163 4.176 4.138 4.247 4.219
UNC 5/8” - 11 2.309 15.875 26.218 13.376 13.043
UNC 3/4” - 10 2.540 19.050 29.393 16.229 15.933 4.823 4.836 4.798 4.910 4.882
UNC 7/8” - 9 2.822 22.225 32.174 19.169 18.763
UNC 1” - 8 3.175 25.400 35.349 21.963 21.504 5.575 5.588 5.524 5.646 5.616
UNC 1 1/8” - 7 3.629 28.575 41.151 24.648 24.122
UNC 1 1/4” - 7 3.629 31.750 47.135 27.823 27.297 7.071 7.084 7.021 7.155 7.120
UNC 1 3/8” - 6 4.233 34.925 53.485 30.343 29.731
UNC 1 1/2” - 6 4.233 38.100 59.375 33.518 32.906 8.545 8.557 8.494 8.639 8.603
UNC 1 3/4” - 5 5.080 44.450 65.725 38.951 38.217
UNC 2” - 4 1/2 5.644 50.800 72.075 44.689 43.876 9.985 9.997 9.934 10.089 10.051
UNC 2 1/4” - 4 1/2 5.644 57.150 78.425 51.039 50.226
UNC 2 1/2” - 4 6.350 63.500 84.775 56.627 55.710 11.481 11.494 11.430 11.595 11.552
UNC 2 3/4” - 4 6.350 69.850 91.125 62.977 62.060
UNC 3” - 4 6.350 76.200 97.475 69.327 68.410 12.964 12.977 12.913 13.086 13.043
UNC 3 1/4” - 4 6.350 82.550 75.677 74.760
UNC 3 1/2” - 4 6.350 88.900 82.027 81.110 14.427 14.440 14.376 14.559 14.514
UNC 3 3/4” - 4 6.350 95.250 88.377 87.460
UNC 4” - 4 6.350 101.600 94.727 93.810 17.450 17.463 17.399 17.595 17.544

20.455 20.467 20.391 20.599 20.546

23.401 23.414 23.338 23.561 23.505

26.294 26.319 26.218 26.457 26.398

29.469 29.494 29.393 29.637 29.576

32.250 32.276 32.174 32.438 32.372

35.425 35.451 35.349 35.616 35.550

41.241 41.266 41.151 41.445 41.372

47.235 47.260 47.135 47.450 47.371

53.485 53.805 53.726

59.375 59.718 59.632

65.725 66.073 65.987

72.075 72.428 72.339

78.425 78.783 78.694

84.775 85.183 85.049

91.125 91.493 91.402

97.475 97.848 97.757

448 ISCAR