Dormer Pramet R520 7.70 mm CARBIDE TiN CDX STRAIGHT SHANK STUB DRILL DIN 6539

The Dormer Pramet R520 7.70 mm Carbide TiN CDX Straight Shank Stub Drill (DIN 6539) is a durable, versatile tool designed for precise, clean holes in a wide range of metals. Its 130-degree point centers itself and minimizes start-up force, helping you begin cuts smoothly and stay on center through the first pass.

With a premium carbide core and a Titanium Nitride coating, this drill is built for longer life and cooler operation. The convex cutting edges help break chips efficiently, enabling higher cutting speeds and feeds without sacrificing hole quality.

• 130° point for self-centering and reduced starting thrust: The point geometry helps you start holes cleanly, reducing push force and improving first-pass accuracy.
• TiN coating for extended tool life: The Titanium Nitride layer resists wear, delivering longer life and better performance when drilling harder materials.
• Convex cutting edges for faster, smoother chip breakup: Enhanced chip control and higher cutting speeds translate to consistent hole quality and less downtime.

This drill delivers consistent, high-quality results with minimal rework. The 7.70 mm diameter and DIN 6539 straight shank fit standard collets and holders, making it a reliable choice for workshops, engineers, and tradespeople. Its combination of carbide hardness, TiN wear resistance, and optimized geometry supports accurate holes at high speeds and feeds, achieving h8 hole tolerance with repeatable results. Suitable for steel, aluminum, and stainless steel, it helps you speed up production, reduce downtime, and improve overall hole quality on every job.