Iyakwazi ukujika i-taper surface, i-cylindrical surface, i-arc surface, umngxuma wangaphakathi, i-slots, imicu, njl., kwaye isetyenziselwa ngokukodwa ukuveliswa kobuninzi beengxenye zediski kunye ne-shaft emfutshane kwimigca yemoto kunye nesithuthuthu.