Iintshulube kunye nezixhobo zoomatshini bokungqusha Umbungu yishafti esisilinda, enemisonto enehelical esikwe kumphezulu wawo. Iizixhobo zeentshulubelivili elinamazinyo elithungelana nombungu, liguqula intshukumo ejikelezayo yombungu ibe yintshukumo yomgca wegiya. Amazinyo akwisixhobo seentshulube asikwa nge-engile ehambelana ne-engile ye-helical groove kwi-worm.
Kumatshini wokugaya, i-worm kunye ne-worm gear isetyenziselwa ukulawula ukuhamba kwentloko yokugaya okanye itafile. Umbungu uhlala uqhutywa yimoto, kwaye njengoko ujikeleza, uzibandakanya namazinyo egiya leentshulube, ibangela ukuba igiya ihambe. Le ntshukumo idla ngokuchaneka kakhulu, ivumela ukubeka okuchanekileyo kwentloko yokugaya okanye itafile.
Enye inzuzo yokusebenzisa intshulube kunye negiya leentshulube koomatshini bokungqusha kukuba ibonelela ngenqanaba eliphezulu lenzuzo yoomatshini, ivumela imoto encinci ukuqhuba intshulube ngelixa ifezekisa intshukumo echanekileyo. Ukongeza, ngenxa amazinyo intshulubeizixhobo Ukuzibandakanya nombungu kwi-engile enganzulwanga, kukho ukukhuhlana okuncinci kunye nokuguga kumalungu, ivili leentshulube kunye nesondo elikhokelela kubomi obude benkonzo yenkqubo.