Ulusi ndodo

Andodo ya ulusi, amadziwikanso kuti ambiri, ndi ndodo yaitali ndithuulusi kumbali zonse ziwiri; ulusiwo ukhoza kupitirira utali wonse wa ndodoyo.^[1]Zapangidwa kuti zigwiritsidwe ntchitokukangana.^[2]Threaded rod inbar katundumawonekedwe nthawi zambiri amatchedwaulusi wonse.

Pankhani ya mawonekedwe, ma stud bolt aka ma stud amagawidwa m'magulu atatu: "maboliti opangidwa bwino", "ma tap-end stud bolts", ndi "double-end stud bolts". Iliyonse mwa ma studs awa ili ndi ntchito yosiyana. Monga momwe dzina likusonyezera, zipilala zokhala ndi ulusi wonse zimakhala ndi thupi lonse ndi ulusi kuti zigwirizane ndi mtedza wa matings kapena ziwalo zofananira. Ma tap-end studs ali ndi ulusi kumapeto kwenikweni kwa thupi lokhala ndi ulusi wosafanana kutalika kwake, pomwe ma bawuti omaliza amakhala ndi ulusi wofanana mbali zonse ziwiri. Kupatula izi, pali zomangira za ma flanges, zomwe zimakhala ndi ulusi wokhazikika wokhala ndi malekezero opindika, ndi zomata zapawiri zokhala ndi shank yochepetsedwa yopangira ma bolting apadera.

Kwa ma studs omwe alibe ulusi wathunthu, pali mitundu iwiri ya ma studs: ma studs athunthu, ndi ma studs odulidwa. Zipilala zathunthu zimakhala ndi shank yofanana ndi mainchesi akulu a ulusi. Ma undercut studs ali ndi shank yofanana ndi kukula kwa ulusi wa screw. Ma undercut studs adapangidwa kuti azigawa bwino ma axial stress. Mu stud yodzaza ndi zopanikizika zimakhala zazikulu mu ulusi kusiyana ndi shank.