Engineered for precision metalworking, this high-performance coolant through carbide drill delivers superior heat dissipation and chip evacuation in deep-hole operations. Manufactured by Durable Mills, our solid carbide drills ensure exceptional surface finishes across stainless steel, alloy steel, and cast iron. Upgrade your CNC production line with reliable coolant-fed carbide drill tooling built for long service life.
Engineered by Durable Mills, our 3D internal coolant solid carbide drills provide exceptional performance in demanding drilling applications. Designed with optimized internal cooling channels, a self-centering 140° point geometry, and a specialized flute design, this coolant through carbide drill maximizes chip evacuation and minimizes heat accumulation at the cutting zone.
Designed for medium-to-large batch production runs across CNC machining centers, automated transfer lines, and milling centers. Ideal for machining:
| Cutting Dia. D (mm) | Flute Length L3 (mm) | Shank Length LS (mm) | Shank Dia. d (mm) | Overall Length L (mm) |
|---|---|---|---|---|
| 3.0 – 4.0 (step 0.1) | 20 | 28 | 4 | 62 |
| 4.1 – 4.7 (step 0.1) | 24 | 36 | 6 | 66 |
| 4.8 – 6.0 (step 0.1) | 28 | 36 | 6 | 66 |
| 6.1 – 7.0 (step 0.1) | 34 | 36 | 8 | 79 |
| 7.1 – 8.0 (step 0.1) | 41 | 36 | 8 | 79 |
| 8.1 – 10.0 (step 0.1) | 47 | 40 | 10 | 89 |
| 10.1 – 12.0 (step 0.1) | 55 | 45 | 12 | 102 |
| 12.1 – 14.0 (step 0.1) | 60 | 45 | 14 | 107 |
| 14.1 – 16.0 (step 0.1) | 65 | 48 | 16 | 115 |
Durable Mills provides complete OEM, ODM, and bulk wholesale services for global tool distributors and machine shop chains. Custom diameters, step drills, extended lengths, and specialized PVD coatings are available upon technical drawing submission.
Need custom dimensions or wholesale volume pricing? Contact our engineering sales team or email us directly at info@durablemills.com.
A minimum coolant pressure of 15 to 20 bar (215 to 290 PSI) is recommended for stable chip flushing and cutting edge lubrication. For drilling high-temperature alloys or stainless steel, 30+ bar delivers optimal results.
The cylindrical plain shank according to DIN 6535-HA (with precision h6 tolerance) ensures concentricity and minimal runout (< 0.005 mm) when clamped in high-precision collet chucks, hydraulic expansion holders, or shrink-fit holders.
While it is geometrically possible, running this drill with external flood coolant significantly reduces tool life and drill penetration rates. Internal through-spindle cooling is strongly recommended to realize maximum performance.
Yes. We offer DIN 6535-HB (Weldon flat) shanks upon request, as well as customized PVD coatings (such as AlTiN, AlCrN, or Diamond) tailored to specific customer workpiece requirements.
