錐管螺紋的尺寸是通過(guò)表查的,無(wú)需公式計(jì)算.看看這個(gè)吧
°圓錐管螺紋(BSPT)
螺紋代號(hào)
基本尺寸
英 寸 大徑
mm
d=D 螺距
mm
p 每英寸牙數(shù)
tpi 中徑
mm
d2=D2 小徑
外螺紋
d3 牙型高度
H1 圓弧尺寸
r 底孔尺寸
mm
R 1/16 1/16" 7.723 0.907 28 7.142 6.561 0.581 0.125 6.4
R 1/8 1/8" 9.728 0.907 28 9.147 8.566 0.581 0.125 8.4
R 1/4 1/4" 13.157 1.337 19 12.301 11.445 0.856 0.184 11.2
R 3/8 3/8" 16.662 1.337 19 15.806 14.950 0.856 0.184 14.75
R 1/2 1/2" 20.955 1.814 14 19.793 18.631 1.162 0.249 18.25
R 3/4 3/4" 26.441 1.814 14 25.279 24.117 1.162 0.249 23.75
R 1 1" 33.249 2.309 11 31.77 30.291 1.479 0.317 30
R 1 1/4 1 1/4" 41.910 2.309 11 40.431 38.952 1.479 0.317 38.5
R 1 1/2 1 1/2" 47.803 2.309 11 46.324 44.845 1.479 0.317 44.5
R 2 2" 59.614 2.309 11 58.135 56.656 1.479 0.317 56
R 2 1/2 2 1/2" 75.184 2.309 11 73.705 72.226 1.479 0.317 71
R 3 3" 87.884 2.309 11 86.405 84.926 1.479 0.317 85.5
R 4 4" 113.030 2.309 11 111.551 110.072 1.479 0.317 110.5
R 5 5" 138.430 2.309 11 136.951 135.472 1.479 0.317 136
R 6 6" 163.830 2.309 11 162.351 160.872 1.479 0.317 161.5