Engineered for high-efficiency holemaking, our solid carbide drill delivers exceptional centering precision across alloy steel and cast iron. This premium solid carbide drill bit features external cooling and an m7 tolerance for smooth chip flow. Choose our solid carbide drills for rigid, high-speed CNC drilling operations.
Manufactured by Durable Mills, this premium solid carbide drill (3×D drilling depth) is purpose-built for modern CNC machining operations requiring superior hole quality, tight tolerances, and extended tool life. With an external cooling design and a standard DIN 6535 HA cylindrical shank, it guarantees maximum rigidity and minimum runout in high-load cutting environments.
Units: Millimeters (mm). Legend: D = Drill Diameter | L3 = Flute Length | LS = Shank Length | d = Shank Diameter | L = Overall Length
| Diameter D (m7) | Flute Length L3 | Shank Length LS | Shank Dia. d (h6) | Total Length L |
|---|---|---|---|---|
| 3.0 | 20 | 28 | 4 | 62 |
| 3.1 | 20 | 28 | 4 | 62 |
| 3.2 | 20 | 28 | 4 | 62 |
| 3.3 | 20 | 28 | 4 | 62 |
| 3.4 | 20 | 28 | 4 | 62 |
| 3.5 | 20 | 28 | 4 | 62 |
| 3.6 | 20 | 28 | 4 | 62 |
| 3.7 | 20 | 28 | 4 | 62 |
| 3.8 | 20 | 28 | 4 | 62 |
| 3.9 | 20 | 28 | 4 | 62 |
| 4.0 | 20 | 28 | 4 | 62 |
| 4.1 – 4.7 | 24 | 28 | 6 | 66 |
| 4.8 – 6.0 | 28 | 36 | 6 | 66 |
| 6.1 – 7.5 | 34 | 36 | 8 | 79 |
| 7.6 – 8.0 | 34 | 36 | 8 | 79 |
| 8.1 – 10.0 | 47 | 40 | 10 | 89 |
| 10.1 – 12.0 | 55 | 45 | 12 | 102 |
| 12.1 – 14.0 | 60 | 45 | 14 | 107 |
| 14.1 – 16.0 | 65 | 48 | 16 | 115 |
* Note: Diameters are available in full 0.1 mm increments (from 3.0 mm to 16.0 mm). Custom steps and non-standard shank dimensions can be custom ordered upon request.
The 140° angle optimizes cutting pressure distribution, while our specialized chisel edge correction enhances centering capability. This eliminates the requirement for prior center punching and prevents drill wandering on curved or uneven workpieces.
Yes. The combination of micro-grain carbide substrate and wear-resistant He/PT coating provides high thermal barrier protection, making it ideal for stainless steel, structural steel, and abrasive cast irons.
For optimum tool life and runout accuracy below 0.005 mm, we recommend using hydraulic chucks, precision ER collet chucks, or shrink-fit holders.
Yes. We offer wholesale discounts, private labeling, and tailored tool design services for industrial distributors and large machine shops. Please contact our sales engineering team or email us at info@durablemills.com for quotation requests.
