Wodula mphero wolemera kwambiri amawonjezera moyo wautumiki wa 20% poyerekeza ndi wodula wamba.
Mphero yomaliza ndi chida chocheka chozungulira cha mafakitale chomwe chitha kugwiritsidwa ntchito pogaya.Amatchedwanso "milling bits".
Aluminiyamu ndi yofewa poyerekeza ndi zitsulo zina.Zomwe zikutanthauza kuti tchipisi zimatha kutseka zitoliro za zida zanu za CNC, makamaka ndi mabala akuya kapena otsika.Zopaka zopangira mphero zimatha kuthandiza kuchepetsa zovuta zomwe aluminium yomata imatha kupanga.
Wodula mphero ya mpira amadziwikanso kuti "mphero ya mphuno".Mapeto a chida ichi ndi pansi ndi utali wozungulira wathunthu wofanana ndi theka la m'mimba mwake chida, ndi m'mbali ndi pakati kudula.
Mphero zomaliza za mpira wa carbide zimakhala ndi kutalika kwa chitoliro (1.5xD), mbali ziwiri, zitatu, kapena zinayi, ndi malo odulira utali wonse kapena "mpira" kumapeto.Amapezeka mumitundu yonse ya geometri ndi mapangidwe apamwamba kwambiri.