Lisebelisoa tsa ho cheka tšepe e phahameng ea lebelo le phahameng la 6542 e Eketsehileng ea Long Twist Drill
Mochini oa tšepe o sothang ka lebelo le phahameng ke sesebelisoa sa ho phunya masoba a chitja a mosebetsi sengoathoana ka ho bilika le ho seha se amanang le axis e tsitsitseng.E rehiloe lebitso ka lebaka la sebopeho sa spiral sa liphala tsa chip, tse tšoanang le li-twist.Li-spiral grooves li na le li-grooves tse 2, li-grooves tse 3 kapa ho feta, empa li-grooves tse 2 ke tsona tse tloaelehileng ka ho fetisisa.Li-twist drill li ka hatelloa holim'a lithulusi tsa ho cheka ka letsoho le tsa motlakase tse ts'oaroang ka letsoho kapa mechini ea ho phunya, metjhini e silang, lithapo esita le litsi tsa machining.Thepa e entsoeng ka tšepe e sothang ka lebelo le phahameng ke tšepe e phahameng ka lebelo (HSS).
Moralo oa lekolilo la spiral chip, moralo oa spiral flute, ho itšeha habonolo, ha ho bonolo ho khomarela thipa, ho fihlela ts'ebetso e phahameng haholo.Mosebetsi sengoathoana se na le ho nepahala ho holimo le ho benya.
Fokotsa coefficient ea likhohlano tsa ho cheka, ho nepahala ho phahameng, lebota la lesoba le boreleli
Matla a matla a phekolo ea mocheso, ho hanyetsa ho apara le ho tšoarella, ts'ebeliso e pharaletseng