所谓目数，是指物料的粒度或粗细度，一般定义是指在1英寸*1英寸的面积内有多少个网孔数，即筛网的网孔数，物料能通过该网孔即定义为多少目数： 如200目，就是该物料能通过1英寸*1英寸内有200个网孔的筛网。以此类推，目数越大，说明物料粒度越细，目数越小，说明物料粒度越大筛孔尺寸4.75mm-标准目数:4目筛孔尺寸4.00mm-标准目数:5目筛孔尺寸3.35mm-标准目数:6目筛孔尺寸2.80mm-标准目数:7目筛孔尺寸2.36mm-标准目数:8目筛孔尺寸2.00mm-标准目数:10目筛孔尺寸1.70mm-标准目数:12目筛孔尺寸1.40mm-标准目数:14目筛孔尺寸1.18mm-标准目数:16目筛孔尺寸1.00mm-标准目数:18目筛孔尺寸0.850mm-标准目数:20目筛孔尺寸0.710mm-标准目数:25目筛孔尺寸0.600mm-标准目数:30目筛孔尺寸0.500mm-标准目数:35目筛孔尺寸0.425mm-标准目数:40目筛孔尺寸0.355mm-标准目数:45目筛孔尺寸0.300mm-标准目数:50目筛孔尺寸0.250mm-标准目数:60目筛孔尺寸0.212mm-标准目数:70目筛孔尺寸0.180mm-标准目数:80目筛孔尺寸0.150mm-标准目数:100 目筛孔尺寸0.125mm-标准目数:120 目筛孔尺寸0.106mm-标准目数:140 目筛孔尺寸0.090mm-标准目数:170 目筛孔尺寸0.0750mm标准目数：200目筛孔尺寸0.0630mmr标准目数：230目筛孔尺寸0.0530mmr标准目数：270目筛孔尺寸0.0450mm标准目数：325目差点忘说了：以上是指美国标准（我国用的是这个标准），如果是泰勒的尺寸会 有差别。目数丝径孔径开孔回积网重（磅）/100平方英尺英寸毫米英寸毫米1x1.0802.03.92023.3784.641.12X2.0631.60.43711.1076.451.23X3.0541.37.2797.09 :70.156.74X4.0631.60.1874.7556.0104.84X4.0471.19.2035.16 165.957.65X5.0411.04.1594.04 :63.254.96X6.035.89.1323.3562.748.18X8p.028.71.0972.46P 60.2P41.110X10：025.64.0751.91P 56.341.210X10.020.51.0802.0364.026.112X12.023.584.0601.5251.842.212X12p.020.508.0631.60P 57.231.614X14.023.584.0481.2245.249.814X14.020.508.0511.3051.037.216X16f.018.457 .()4451.1350.734.518X18r.017.432 .()386.98P 48.334.820X20.020.508 .()300.7636.055.220X201 .016.406 .()340.86，46.2P34.424X24.014.356 .()277.70P 44.231.830X30.013.330 .()203.5237.134.830X30.012.305 .()213.5440.829.430X30.009.229 .()243.6253.116.135X35P.011.279 .()176.45P 37.929.040X40.010.254 .()150.3836.027.650X50.009.229 .()110.2830.328.450X50r.008.203 .()120.31二 36.022.160X60.0075191 .0()92.2330.523.760X60.007.178 .()097.2533.920.470X70.0065165 .00)78.20 29.820.880X80.0065165 .00)60.15r 23.023.280X800055140 .00)70.1831.4一16.990X90.005.127 .()061.16r 30.1r15.8100X100.0045114 .00)55.14二 30.314.2100X100.004.102 .()060.1536.011.0100X100.0035089 .00)65.1742.38.3110X110.00401016 .0)051 .1：295r 30.712.4120X120.00370940 .0)064 .1168r 30.711.6150X15000260660 .0)041 .1()4137.47.1160X160.00250635 .0)038 .0!965:36.4P5.94180X180.00230584 .0)033 .01838二 34.76.7200X200.00210533 .0)029 .073733.66.2250X250.00160406 .0)024 .0(61036.04.4270X270.00160406 .0)021 .0，533r-32.24.7300X300.00510381 .0)018 .0457P 29.73.04325X32500140356 .0)017 .043230.04.40400X400.00100254 .0)015 .370L 36.0P3.3500X500.00100254 .0)010 .0：254p 25.03.8635X635.00080203 .0)008 .0：20325.02.63