Uhlobo olunjalo lwe-helicalizixhobo zangaphakathi ngokuqhelekileyo kufuna ukuguqulwa kweprofayili kunye nokuchaneka kwe-ISO6-7, phambi kokuthunyelwa kwayo yonke into, siya kubonelela ngaphantsi kwezi ngxelo kumthengi ukujonga iinkcukacha zegiya ye-helical ukuqinisekisa ukuba zonke ziqondakala ngokucacileyo kwaye zilungile ukuthunyelwa.

1) Umzobo webhamuza

2)Dingxelo yokunyuselwa

3)Hyitya ingxelo yonyango ngaphambi kokunyanga ubushushu

4)Hyitya ingxelo yonyango emva kokunyanga ubushushu

5)Mingxelo yendawo

6)Aingxelo yokuchaneka

7)Pimifanekiso kunye nazo zonke iividiyo zokuvavanya ezifana nokubaleka, i-Cylindricity njl

I-8) Ezinye iingxelo zokuvavanya ngokwemfuno yabathengi njengengxelo yokufumanisa impazamo