HSS Centering Drill Bit 3mm Set for Bench Milling Machine and Lathe, High Speed Steel Center Drill with Enlarged Chip Flute, Durable Metalworking Bit Pack for Precise Marks, Clean Holes, and Pro Results
✔️ High speed steel build, wide chip flute, 3mm size, bench mill ready
This 10piece pack of hss centering drill bits gives you reliable pilot spots for precision machining tasks. You typically run these on metal lathes, milling machines, or drill presses to lay down clean center marks before switching to larger cutters. The heat sharpened geometry keeps the 3mm edge biting deep into steel, aluminum, and plastic workpieces without wandering or skating.
✅ 3mm overall cutting diameter for exact layout spots✅ Heat treated high speed steel build resists wear over time
✅ Wide open chip groove moves shavings fast away from steel
✅ Straight shank fits standard collets on bench lathes and mills
✅ Complete tenpiece stock saves shop space between shifts
💡 What sets a proper metal center bit apart from a standard twist drill?
You want steady feed pressure and good heat venting when laying out blanks because sloppy centers wreck alignment on tight jobs.
- drive the spindle forward with firm even pressure so the grooves spit out metal fast
- spin the quill at mid range rpm so the hss steel keeps its bite during heavy passes
- grab fresh cutters when they lose their edge to keep the whole shop handy and square
- mop up coolant spray nearby since oily floors get slippery around busy rigs