The internal coolant carbide drill delivers superior penetration rates and high-feed reliability in deep-hole CNC operations. Equipped with dual internal fluid channels, this internal coolant carbide drill rapidly dissipates cutting heat while flushing chips efficiently. Durable Mills manufactures high-precision internal coolant carbide drills tailored for stainless steel and cast iron machining.
Engineered and supplied by Durable Mills, our premium 5D internal coolant carbide drill series is purpose-built for heavy-duty metal removal and high-feed precision manufacturing. With specialized internal cooling pathways and ultra-fine micrograin carbide substrates, these drills ensure exceptional hole straightness, minimal thermal distortion, and extended tool life.
This internal coolant carbide drill delivers exceptional cutting efficiency across a broad spectrum of challenging industrial metals:
Drill Depth: 5D | Point Angle: 140° | Cutting Diameter Tolerance: m7 | Shank Tolerance: h6 | Standard: DIN 6535HA
| Cutting Diameter D (mm) | Flute Length L3 (mm) | Shank Length LS (mm) | Shank Diameter d (mm) | Overall Length L (mm) |
|---|---|---|---|---|
| 3.0 – 4.0 (0.1 mm step) | 28 | 28 | 4 | 62 |
| 4.1 – 4.7 (0.1 mm step) | 36 | 36 | 6 | 74 |
| 4.8 – 6.0 (0.1 mm step) | 44 | 36 | 6 | 82 |
| 6.1 – 7.5 (0.1 mm step) | 53 | 36 | 8 | 91 |
| 7.6 – 8.0 (0.1 mm step) | 53 | 36 | 8 | 91 |
| 8.1 – 10.0 (0.1 mm step) | 61 | 40 | 10 | 103 |
| 10.1 – 12.0 (0.1 mm step) | 71 | 45 | 12 | 118 |
| 12.1 – 14.0 (0.1 mm step) | 77 | 45 | 14 | 124 |
| 14.1 – 16.0 (0.1 mm step) | 83 | 48 | 16 | 133 |
An internal coolant carbide drill injects high-pressure fluid directly to the cutting zone, providing instant cooling at the chisel edge. This prevents thermal shock, reduces tool wear, and pushes metal chips out of the hole smoothly, avoiding re-cutting.
We recommend maintaining a coolant delivery pressure between 20 and 50 bar (300 to 725 PSI). For stainless steel and alloy steel drilling, higher coolant pressure improves chip breaking and ensures dependable evacuation.
Yes. Durable Mills specializes in bespoke CNC tooling solutions, custom drill geometries, non-standard lengths, and private-label OEM manufacturing. Please email our technical team at info@durablemills.com or send an inquiry through our Contact Us Page.
Hydraulic chucks and shrink-fit toolholders equipped with through-tool coolant seals offer the best concentricity and clamping force, maintaining runout within 0.003–0.005 mm for extended drill life.
Need bulk supply or a customized drilling solution?
Reach out via our Contact Us Page or contact info@durablemills.com for B2B wholesale pricing and global delivery schedules.
