1. Kutanga, tarisa kona yeshinda
Nzira chaiyo ndeyekuyera ne thread gauge. 60° ndeye standard yeAmerica, uye 55° ndeye standard yeBritish.
Kana pasina maturusi aripo, eshinda dzepombi, unogona kuona nzira yekuvhara: Nshinda dzeNPT dzemuAmerica dzinowanzo vhara netambo yeshinda pachayo; Nshinda dzeBSP dzemuBritain (dzakadai seBSPT, BSPP) dzine kona yeshinda ye55°, uye shinda dzeBSPP dzakafanana dzinofanira kuvimba nerin'i yekuvhara kuti dzivhare.
2. Ma parameter ekuongorora kiyi (hukuru neTPI)
Kune zvinosunga zvakaita semabhaudhi nenzungu zvine tambo dzinobatanidzwa, mushure mekuyera dhayamita huru (dhayamita yekunze yeshinda yekunze / dhayamita yemukati yeshinda yemukati), chinhu chakakosha kuverenga huwandu hwetambo pa inch (TPI), wobva watarisa uchishandisa bhuku rekushandisa.
Kune shinda dzepombi, pamusoro pekuyera saizi, unofanirwawo kuona kana iri shinda yakatetepa (senge NPT, BSPT) kana shinda yakatwasuka (senge BSPP), pamwe nenzira yekuvhara.
3. Tarisa zvakananga kodhi yakajairwa
Kana paine chiratidzo chakajairika pachikamu (senge UNC, UNF, BSW, BSF, NPT, BSPP, nezvimwewo), iyi ndiyo hwaro hwakavimbika zvikuru.
Dzokera kumashure kunobva
Chishandiso cheBritish chakabva pachinhu chaJoseph Whitworth chakaita madhigirii 55 eWhitworth muna 1841;
Tambo yeAmerican standard yakakurudzirwa naWilliam Sellers muna 1864 setambo ye60-degree.
Kutaura zvazviri, panguva yeHondo Yenyika II, mitemo yeBritain neAmerica yakakonzera matambudziko makuru pakuchinjana kwemidziyo pakati pemauto eAllied. Saka, muna 1948, United States, United Kingdom, neCanada vakagadzira pamwe chete mutemo weUNC/UNF.
Zvinofadza kuti, kubva muna 1961, masangano epasi rose akakodzera akatanga kushandisa nzira yeBritish standard thread specification, ISO R 228. Saka ikozvino, thread yeBritish imhando yeBritish hard standard inoshandiswa pasi rose.
Nguva yekutumira: Kukadzi-05-2026
