Cov Qauv Txheej Txheem rau cov khoom siv cog hniav feem ntau yog nruab nrab 15-25 nm. Qhov no yog qhov taw qhia tseem ceeb rau kev ntsuas cov neeg muaj peev xwm kev ruaj khov thiab ua ke. Torques tshaj 25 nm yuav qhia tau tias siv tau, thaum Torques hauv qab 15 nm yuav qhia qhov tsis muaj peev xwm.
Tshwj xeeb, lub zog tiv thaiv tus hniav yog me me thaum lawv thawj zaug cog, feem ntau hauv qab 20, uas tuaj yeem nce kev ruaj khov ntawm kev cog hniav. Sij hawm dhau mus, lub zog torque tuaj yeem nce rau 40-60 nm. Tsis tas li ntawd, kev tswj cov cuab yeej siv zog xws li cov tuam txhab kom paub meej tias cov kev teeb meem thiab cog hniav yog yuam kom 25 ncm nyob rau ib lub sijhawm los ua tiav cov nyhuv ruaj khov thiab muaj txiaj ntsig.