Chingwe cha mpira ndi chowongoletsera chambiri chomwe chimapangitsa kuti mpira ukhale woyenda pakati pa screw Axis ndi nati. Poyerekeza ndi chowoloka chowoneka bwino, izi zimayendetsa chimbudzi cha gawo limodzi mwa magawo atatu kapena kuchepera, ndikupangitsa kuti ikhale yoyenera kupulumutsa mphamvu yamagalimoto
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Zomangira za mpira wokhala ndi spline
Kgg adayang'ana pa haibridi, yaying'ono ndi yopepuka. Zomangira za mpira wokhala ndi sprine wa mpira umakonzedwa pa screw screw shaft, izi zimathandizira kuyenda mogwirizana komanso movomerezeka. Kuphatikiza apo, ntchito yoyamwa mpweya imapezeka kudzera mungu.
