O lenei mea faʻapipiʻi e faʻaaogaina i masini faufale.Gear shafts i masini felauaiga e masani lava ona faia i le 45 uamea i le maualuga o le carbon steel, 40Cr, 20CrMnTi i le uʻamea uʻamea, ma isi. E masani lava, e fetaui ma manaʻoga malosi o meafaitino, ma e lelei le ofuina o le teteʻe.O lenei spur gear shaft na faia e 20MnCr5 low carbon alloy steel, carburizing i le 58-62HRC.