Lub teb chaws cov yeeb nkab Tapered roj (NPTF)
Qhov kev sib txuas no tseem siv tau dav hauv cov kav dej xa hluav taws xob, txawm hais tias nws tsis pom zoo los ntawm National Fluid Power Association (NFPA) rau kev siv hauv kev siv hluav taws xob ua kua hydraulic. Cov xov yog tapered thiab lub foob siv qhov chaw los ntawm deformation ntawm cov xov. Cov txiv neej thiab poj niam xov sib txuas thiab lub foob raug tsim thaum ob leeg ua ke ua ke (piv txwv li xov deformation). Qhov no yog hu ua xov foob xov qhuav.
Nco tseg: Ob lub NPTF, NPT, BSPT cov khoom sib txuas zoo li tsis sib xws, tsis hloov pauv.
Nti luaj li cas | Loj loj | Xov ib nti | Txiv neej Xov OD (hauv) | Poj niam xov OD (hauv) | ||
1⁄8 | -2 | 27 | 13⁄32 | 0.41 | 3⁄8 | 0.38 |
1⁄4 | -4 | 18 | 17⁄32 | 0.54 | 1⁄2 | 0.49 |
3⁄8 | -6 | 18 | 11⁄16 | 0.68 | 5⁄8 | 0.63 |
1⁄2 | -8 | 14 | 27⁄32 | 0.84 | 25⁄32 | 0.77 |
3⁄4 | -12 | 14 | 11⁄16 | 1.05 | 1 | 0.98 |
1 | -16 | 111⁄2 | 15⁄16 | 1.32 | 11⁄4 | 1.24 |
11⁄4 | -20 | 111⁄2 | 121⁄32 | 1.66 | 119⁄32 | 1.58 |
11⁄2 | -24 | 111⁄2 | 129⁄32 | 1.90 | 113⁄16 | 1.82 |
2 | -32 | 111⁄2 | 23⁄8 | 2.38 | 25⁄16 | 2.30 |
