Deep Hole Cooling Tungsten Carbide Drill Bit

Deep Hole Internal Coolant Tungsten Carbide Drill Bit

Deep holes, one pass through. Cooling, from the inside out.

The biggest challenges in deep hole drilling?
Poor chip evacuation, inadequate cooling, and burned drill bits.
Our Deep Hole Internal Coolant Tungsten Carbide Drill Bit is designed to solve exactly these problems.

Why Choose Our Internal Coolant Deep Hole Drill Bit?

💧 Internal coolant – reaches the cutting edge directly
Dual‑spiral internal coolant holes deliver high‑pressure coolant straight to the cutting zone, instantly removing heat and preventing tool burn‑out.

🌀 Smooth chip evacuation – no clogging
Optimized flute geometry combined with coolant pressure forcefully ejects chips – deep hole drilling in one smooth operation.

🔩 Tungsten carbide body – rigid and stable
Ultra‑fine grain solid carbide provides high rigidity and bending resistance. Even at 5× or 10× diameter depth, the bit stays steady and chatter‑free.

⚙️ Built for deep hole applications
Standard capability: 3D to 12D depth‑to‑diameter ratio. Custom up to 20D+ available – ideal for ejector pin holes in molds, hydraulic valve bodies, gun drilling, etc.

✅ Excellent hole quality and straightness
Internal cooling minimizes thermal deformation; smooth chip evacuation prevents secondary scratching – resulting in clean, straight hole walls.

Typical Applications

• Mold industry: ejector pin holes, cooling channels
• Hydraulic/pneumatic components: deep valve body holes
• Automotive parts: long bolt holes, oil passages
• Aerospace: structural deep holes
• General machinery: any deep hole with L/D > 5