Injin noma kamar tarakta ko masu yankan diski ko da yaushe suna amfani da gear bevel , wasu sun yi amfani da kayan karkace , wasu sun yi amfani da madaidaiciyar bevel , wasu sun yi amfani da injin lapping bevel , wasu kuma suna buƙatar babban injin niƙa . bevel Gears , da daidaito zama DIN8 .Duk da haka mu yawanci amfani da low kartani gami karfe , yi carburizing domin saduwa surface da hakora taurin a 58-62HRC domin inganta kaya ta rayuwa .