Iumphini wombungu, ekwaziwa ngokuba ngumbungu, licandelo elibalulekileyo kwinkqubo yezixhobo zeentshulube ezisetyenziswa kwizikhephe. Nantsi imisebenzi ephambili ye-worm shaft kumxholo wolwandle:

1. **Ukuhanjiswa koMbane**: Ishafti yeentshulube inoxanduva lokuhambisa amandla ukusuka kwindawo yokufaka igalelo (njengenjini yombane okanye inkqubo yolwelo olwenziwa ngamanzi) ukuya kwimveliso (njengesixhobo sokuqhuba okanye iwintshi). Ikwenza oku ngokuguqula isindululo esijikelezayo sibe kuhlobo olwahlukileyo lwesindululo (ngokuqhelekileyo sinomgca okanye sijikeleza kwi-engile elungileyo).

2. **Ukunciphisa isantya**: Omnye wemisebenzi ephambili ye-worm shaft kukubonelela ngokunciphisa okubonakalayo kwisantya. Oku kuphunyezwa ngomlinganiselo ophezulu wenkqubo yegiya yeentshulube, evumela ukuhamba kancinci, okulawulwayo kweshaft yokuphuma.

3. **Ukuphindaphinda kweTorque**: Kunye nokunciphisa isantya, i-worm shaft iphinda-phinda itorque. Oku kuluncedo ngakumbi kwizicelo apho i-torque ephezulu ifuneka ngesantya esiphantsi, njengokuphakamisa imithwalo enzima ngewintshi okanye ukubonelela ngolawulo oluchanekileyo.

4. **Utshintsho lwezalathiso**: Iumphini wombunguitshintsha isalathiso sentshukumo yegalelo ngamadigri angama-90, eluncedo kwizicelo apho imveliso kufuneka ihambe nge-perpendicular kwigalelo.

5.**Ukuzitshixa**: Kwezinye iidizayini, i-worm shaft inesici sokuzivalela, nto leyo ethetha ukuba inokuthintela imveliso ekujikelezeni umva xa igalelo limisiwe. Oku kubalulekile kukhuseleko kwizicelo ezifana neewintshi, apho ufuna ukuqinisekisa ukuba umthwalo awutyibiliki.

6. **Ulawulo oluchanekileyo**: I-worm shaft ivumela ulawulo oluchanekileyo malunga nokunyakaza kokuphuma, okuyimfuneko kwizicelo ezifuna ukubekwa ngokuchanekileyo okanye ukunyakaza, njengakwiisistim zokuqhuba isikhephe.

7. **Ubuchule beSithuba**: Ishafti yeentshulube isenokwenziwa ukuba icukene, iyenze ilungele ukusetyenziswa kwindawo enyiniweyo edla ngokufumaneka kwizikhephe.

8. **Ukuqina**: Ishafti zeentshulube ziyilelwe ukuba zomelele kwaye zimelane nemekobume erhabaxa yaselwandle, kuquka nokuba sesichengeni samanzi anetyuwa kunye neemeko zemozulu ezahlukeneyo.

9. **ULondolozo oluLula**: Ngelixa iishafti zeentshulube zithembeke ngokubanzi, zinokuba lula ukuzigcina nokuzilungisa, nto leyo elulutho kwindawo yaselwandle apho ukufikelela kwiinkonzo ezizodwa zolondolozo kunokunyinwa.

10. **Ukusasazwa koMlayisho**: Iumphini wombunguinceda ekusasazeni umthwalo ngokulinganayo kwigiya yeentshulube, enokwandisa ubomi benkqubo yegiya kunye nokunciphisa ukuguga nokukrazuka.

Isishwankathelo, i-worm shaft idlala indima ebalulekileyo kwiinkqubo ezahlukeneyo zoomatshini kwizikhephe, ibonelela ngeendlela ezithembekileyo nezisebenzayo zokuhanjiswa kwamandla, ukunciphisa isantya, kunye nokuphindaphinda kwetorque, lonke ixesha livumela ulawulo oluchanekileyo kunye notshintsho lwesikhokelo.