Cobalt HSS Twist Drills
Cobalt HSS Twist Drills are manufactured with high cobalt content for enhanced heat resistance and durability. They are perfect for drilling tough materials such as stainless steel and high-strength alloys.
M35 steel with 5% cobalt. The chemistry holds up under heat and keeps its edge.
Full metric range from M1 to M13. One set covers most shop work.
Small Craftsman (Shandong) Machine & Tools Co., Ltd. is one of the leading manufacturers and suppliers of cobalt hss twist drills in China. If you're going to wholesale bulk advanced cobalt hss twist drills, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
These HSS-Co Twist Drill Bits are made from M35 high-speed steel with 5% cobalt. The alloy ratio is dialed in for actual cutting conditions.
Cobalt HSS Twist Drills are manufactured with high cobalt content for enhanced heat resistance and durability. They are perfect for drilling tough materials such as stainless steel and high-strength alloys.
M35 steel with 5% cobalt. The chemistry holds up under heat and keeps its edge.
Full metric range from M1 to M13. One set covers most shop work.
This Cobalt Twist Drill Bit stays hard when the cut gets hot. No annealing, no softening.
Built for stainless steel, but handles mold steel, aluminum, cast iron, and copper too.
Precision ground cutting edges. Starts fast, locates where you put it.
Runs smooth with minimal vibration. The drill feeds straight without wandering.
Flutes are ground clean and regular. Chips clear out without packing up.
Good chip flow cuts down on heat and friction. These HSS Cobalt Drill Bits last longer because of it.
The cobalt content is consistent batch to batch. Hard enough to cut, tough enough not to snap.
Optimized for stainless steel's tendency to work-harden and grab. Doesn't heat up as fast, keeps cutting edge longer.
Meets metric industrial standards. Concentricity is tight, hole size is on spec.
Works for production shops, maintenance crews, and manual drilling alike. A solid Cobalt Twist Drill Bit for any job needing a clean hole.
| Type | Diameter (D) | Shank Diameter (d) | Total length (L) | ||
| 3 | 3 | 3 | 50 | ||
| 4 | 4 | 4 | 50 | ||
| 5 | 5 | 5 | 50 | ||
| 6 | 6 | 6 | 50 | ||
| 7 | 7 | 7 | 50 | ||
| 8 | 8 | 8 | 60 | ||
| 9 | 9 | 9 | 60 | ||
| 10 | 10 | 10 | 75 | ||
| 11 | 11 | 11 | 75 | ||
| 12 | 12 | 12 | 75 | ||
| 13*100 | 13 | 13 | 75 | ||
| 14*75 | 14 | 14 | 100 | ||
| 15*100 | 15 | 15 | 75 | ||
| 16*100 | 16 | 16 | 100 | ||
| 17*100 | 17 | 17 | 100 | ||
| 18*100 | 18 | 18 | 100 | ||
| 19*100 | 19 | 19 | 100 | ||
| 20*100 | 20 | 20 | 100 | ||
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