Shaft Shaft ndi chinthu chofunikira kwambiri mu gwero la nyongolotsi, lomwe ndi mtundu wa boarbox zomwe zimakhala ndi zida za nyongolotsi (zodziwika ngati gudumu la nyongolotsi) ndi screw screw. Shaft Shaft ndi ndodo ya cylindrical yomwe gwero limayikidwa. Nthawi zambiri imakhala ndi ulusi wamphamvu (chowongoletsera cha mbozi) chodulidwa pansi. Zovuta za nyongolotsi zimapangidwa ndi zida monga chitsulo chosapanga dzimbiri kapena mkuwa, kutengera zofunikira za kugwiritsa ntchito mphamvu, kukhazikika, komanso kukana kuvala. Amakhala ndendende kuti awonetsetse bwino ntchito ndi kufalitsa kwamphamvu mkati mwa goarbox.