Isuntswana le-drill eliquka isibambi sesixhobo (1) esinencam yencam efakelwayo ezibini zokusikwa (5, 5') kwinqwelomoya engundoqo (C-C), izifakelo zokusika (5, 5) ') zinomphetho omfutshane osembindini ojolise kwi. inqwelomoya yesibini eqhelekileyo (E-E). I-edge yokusika yenza i-point-like central cutting edge yokungena kwi-workpiece kwaye ngaloo ndlela igxininise i-drill bit. Kwi-arbor, iifluti ezimbini zetshiphu (6, 6') zinikiwe, ezisuka kwincam yencam ukuya ekupheleni. Kulo naliphi na icandelo elisecaleni kwe-arbor, iifluti zibekwe ngokulinganayo kwi-diametrically enye kwenye kwi-plane ye-tube, kwaye indiza yetyhubhu ikwi-plane yomhlaba oqhelekileyo (F-F) yamazwe amabini kumacala omabini ombhobho. Ukwandisa kwi-90 °, i-arbor inobunzima obukhulu kule ndiza. Inqwelo-moya yesibini (E-E) yecala lokusika eliphakathi lijoliswe kwi-angle emalunga ne-90 ukuya kwicala elikhulu eliqinileyo (F-F) lendiza yomhlaba okanye ekupheleni kwe-shank.

Kwi-drilling operation yekhonkrithi okanye into enjalo, kunokwenzeka ukunciphisa utshintsho ngokukhawuleza kwimeko yokugaya, kunye nokuzinzisa umsebenzi wokugaya, nangona ukuvelisa ii-chips ezinkulu, ukusebenza kakuhle kokugaya akuthotywanga.

Isahlulo somda osikiweyo sicwangciswe ngokubonakalayo kwimilo yeradial, ubuncinci ubuncinci benxalenye ezimbini zomda wokusika, kwaye ubuncinci imiphetho encedisayo yokusika elahliweyo phakathi kwenxalenye ephambili yokusika kunye nenxalenye ephambili yokusika kwicala elijikelezayo. umgca wokusika oyintloko njengomgca wokusikwa kwayo, kwaye isiphelo sangaphakathi somgca wokusika sisembindini wokujikeleza, kwaye isiphelo sangaphandle sifumaneka kumda wangaphandle wendawo yokujikeleza yecandelo lokusika.