Kusankha bwino zida zodulira mphero ndi njira zogayira mphero kungathandize kwambiri kupanga zinthu.

Zinthu kuyambira pa geometry ndi kukula kwa gawo lomwe likupangidwa mpaka zinthu zomwe zili mu workpiece ziyenera kuganiziridwa posankha yoyenera.chodulira mpheropa ntchito yokonza makina.
Kupukuta nkhope ndi chodulira mapewa cha 90° n'kofala kwambiri m'masitolo ogulitsa makina. Nthawi zina, kusankha kumeneku n'koyenera. Ngati chogwirira ntchito chomwe chikuphwanyidwa chili ndi mawonekedwe osasinthasintha, kapena pamwamba pa chopangiracho chingapangitse kuti kuya kwa choduliracho kusinthe, chopukusira mapewa chingakhale chisankho chabwino kwambiri. Koma nthawi zina, zingakhale bwino kusankha chopukusira nkhope cha 45°.
Pamene ngodya yolowera ya chodulira mphero ili yochepera 90°, makulidwe a axial chip adzakhala ochepa kuposa kuchuluka kwa chakudya cha chodulira mphero chifukwa cha kuchepa kwa ma chips, ndipo ngodya yolowera ya chodulira mphero idzakhala ndi mphamvu yayikulu pa chakudya choyenera pa dzino lililonse. Podulira nkhope, mphero yolowera nkhope yokhala ndi ngodya yolowera 45° imabweretsa ma chips opyapyala. Pamene ngodya yolowera pansi imachepa, makulidwe a chip amakhala ochepa kuposa chakudya pa dzino lililonse, zomwe zimapangitsa kuti chakudya chiwonjezeke ndi nthawi 1.4. Pankhaniyi, ngati mphero yolowera nkhope yokhala ndi ngodya yolowera 90° ikugwiritsidwa ntchito, kupanga bwino kumachepa ndi 40% chifukwa mphamvu yocheperako ya axial chip ya mphero yolowera nkhope ya 45° singatheke.

Chinthu china chofunikira posankha chodulira mphero nthawi zambiri chimanyalanyazidwa ndi ogwiritsa ntchito - kukula kwa chodulira mphero. Masitolo ambiri amakumana ndi kugayidwa kwa zigawo zazikulu, monga ma block a injini kapena nyumba za ndege, pogwiritsa ntchito zodulira zazing'ono, zomwe zimasiya malo ambiri ogwirira ntchito bwino. Mwachiyembekezo, chodulira mphero chiyenera kukhala ndi 70% ya malire odulira omwe amakhudzidwa podulira. Mwachitsanzo, pogayidwa malo angapo a gawo lalikulu, mphero yoyang'ana nkhope yokhala ndi mainchesi a 50mm idzakhala ndi 35mm yokha yodulira, zomwe zimachepetsa kupanga. Kusunga nthawi yochuluka yopangira mphero kungatheke ngati chodulira mphero chachikulu chikugwiritsidwa ntchito.
Njira ina yowonjezerera ntchito zopukusira ndikuwongolera njira yopukusira ya face mills. Pokonza mapulogalamu opukusira nkhope, wogwiritsa ntchito ayenera choyamba kuganizira momwe chidacho chidzalowere mu workpiece. Nthawi zambiri, odulira mphero amangodula mwachindunji mu workpiece. Mtundu uwu wa kudula nthawi zambiri umakhala ndi phokoso lalikulu, chifukwa pamene insert ikutuluka mu cut, chip chomwe chimapangidwa ndi mphero chimakhala chokhuthala kwambiri. Kukhudza kwakukulu kwa insert pa workpiece kumayambitsa kugwedezeka ndikupanga kupsinjika komwe kumafupikitsa moyo wa chida.