I-worm shaft licandelo elibalulekileyo kwi-gearbox ye-worm, luhlobo lwebhokisi yegiya equka i-worm gear (ekwaziwa njengevili le-worm) kunye nesikrufu sombungu.I-worm shaft yi-cylindrical rod apho kufakwe isikrufu sombungu.Ngokuqhelekileyo inomsonto we-helical (isikrufu sombungu) esikwe kumphezulu wayo.
Iintshulube zeentshulube zidla ngokwenziwa ngezinto ezifana nentsimbi, intsimbi engatyiwa, okanye ubhedu, kuxhomekeke kwiimfuno zesicelo sokomelela, ukuqina, kunye nokuxhathisa ukunxiba.Zenziwe ngokuchanekileyo ukuqinisekisa ukusebenza kakuhle kunye nokuhanjiswa kwamandla okufanelekileyo ngaphakathi kwebhokisi yegiya.