I-HSS Twist Drill
I-twist drill iyithuluzi elibhoboza imbobo eyindilinga endaweni yokusebenza ngokusika okujikelezayo okuhlobene ne-eksisi engaguquki. Iqanjwe ngoba umtshingo wayo we-chip umise okwe-spiral futhi ubukeka njenge-twist. Ama-Spiral grooves angaba nama-grooves angu-2, 3 noma ngaphezulu, kodwa ama-grooves angu-2 avame kakhulu. Ama-twist drill angaboshelwa kumathuluzi okubhola aphathwa ngesandla noma kagesi noma asetshenziswe emshinini wokubhoboza, imishini yokugaya, amalebula ngisho nasezikhungweni zemishini. Izinto ze-Drill bit ngokuvamile ziyinsimbi yamathuluzi enesivinini esikhulu noma i-carbide.