DIN6 ndiko kurongeka kwemukati helical giya .Kazhinji isu tine nzira mbiri dzekusangana nekururama kwepamusoro.
1) Hobbing + kugaya zvemukati giya
2) Simba skiving yegiya remukati
Zvisineyi kune giya diki remukati rehelical giya, hobbing haisi nyore kugadzirisa, saka kazhinji taizoita simba rekutsvedza kuti tisangane nekurongeka kwepamusoro uye nekushanda kwepamusoro .Kune giya hombe remukati rehelical, tichashandisa hobbing pamwe nekukuya nzira.Mushure mekufamba kwemagetsi kana kukuya, simbi yepakati katoni senge 42CrMo ichaita nitriding kuwedzera kuoma uye kuramba.