Engineered for precision CNC drilling, our high-performance carbide twist drills deliver exceptional dimensional accuracy across cast iron, structural steel, and stainless steel. Featuring a 140° self-centering point geometry and wear-resistant PVD coating, these industrial carbide twist drills significantly enhance tool life in volume production. Durable Mills supplies premium straight shank carbide twist drills designed to minimize cycle times and machine downtime.
Manufactured by Durable Mills, these industrial carbide twist drills are designed for high-feed, rigid CNC holemaking applications. Configured for external cooling operations and built on a standard DIN 6535 HA straight shank, our carbide twist drills feature optimized web thinning and polished flutes that guarantee reliable chip evacuation and tight hole tolerances across challenging workpiece materials.
All dimensions in millimeters (mm). For custom lengths or volume procurement, contact our technical support team.
| Cutting Dia. D (m7) | Flute Length L3 | Shank Dia. d (h6) | Overall Length L | Cutting Dia. D (m7) | Flute Length L3 | Shank Dia. d (h6) | Overall Length L |
|---|---|---|---|---|---|---|---|
| 3.0 – 5.2 | 20 | Same as D | 50 | 5.3 – 5.9 | 20 | Same as D | 50 |
| 6.0 – 7.5 | 30 | Same as D | 60 | 7.6 – 7.9 | 30 | Same as D | 60 |
| 8.0 – 9.8 | 40 | Same as D | 75 | 9.9 – 12.0 | 40 | Same as D | 75 |
| Cutting Dia. D (m7) | Flute Length L3 | Shank Dia. d (h6) | Overall Length L | Series Type |
|---|---|---|---|---|
| 4.0 – 6.7 (in 0.1mm increments) | 40 | Same as D | 75 | Extended Flute |
| 6.8 – 7.9 (in 0.1mm increments) | 40 | Same as D | 75 | Extended Flute |
| 8.0 – 12.0 (in 0.1mm increments) | 60 | Same as D | 100 | Long Series |
Carbide twist drills provide significantly higher red-hardness and rigidity, allowing cutting speeds 3 to 5 times faster than HSS, reduced hole taper, and substantially longer service life in abrasive materials.
No. Thanks to the corrected chisel edge and 140° self-centering point angle, these drills eliminate spot drilling or center drilling on flat workpiece surfaces, speeding up cycle times.
Yes. We specialize in contract manufacturing, custom step diameters, specialized flute profiles, and laser-etched OEM branding for tooling distributors. Please email info@durablemills.com for specifications.
High-pressure external flood coolant directed at the drill flutes ensures efficient chip flushing and thermal dissipation, especially when drilling deep holes with the extended length series.
Contact our sales engineers to request a product catalog, engineering data sheets, or wholesale quotation.
