Nekuda kweiyo helix angle, iyo chaiyo yekucheka rake angle yepombi inowedzera sezvo helix angle inowedzera.Chiitiko chinotiudza: Pakugadzirisa simbi, helix angle inofanirwa kuve diki, kazhinji kutenderera 30 madhigirii, kuve nechokwadi kusimba kwemazino ehelical uye kubatsira kuwedzera hupenyu hwepombi.Pakugadzirisa simbi dzisina-ferrous dzakadai semhangura, aluminium, magnesium, uye zingi, iyo helix angle inofanira kuva yakakura, inogona kunge yakakomberedza 45 degrees, uye kucheka kunopinza, izvo zvakanaka pakubvisa chip.