Dormer Pramet R520 4.10 mm CARBIDE TiN CDX STRAIGHT SHANK STUB DRILL DIN 6539

The Dormer Pramet R520 4.10 mm carbide drill with a DIN 6539 straight shank is built for precise, reliable hole-making across a range of materials, including steel, aluminium, and stainless steel. Its straight shank fits standard chucks and holders for quick, secure engagement in everyday machining setups.

This drill features a 130° point that helps start holes with minimal wandering, enabling self-centering and reducing the push force required during entry. A Titanium Nitride (TiN) coating extends tool life and boosts performance when drilling harder materials, while convex cutting edges promote easy chip breakage and removal. Crafted from premium carbide, it’s designed to deliver high-quality holes at speed and feed rates while maintaining tight tolerances.

• 130° Point for Self-Centering and Lower Start Force: Improves hole starting accuracy and reduces the effort needed to begin cutting, helping you achieve cleaner entrances and fewer misaligned holes.
• TiN Coated for Longer Life: The TiN coating protects the cutting edges, extending tool life and maintaining performance on tougher materials across extended production runs.
• Convex Cutting Edges for Chip Control: Facilitates efficient chip formation and evacuation, enabling higher speeds and feeds without clogging and reducing the risk of built-up edge.

Designed for consistent, high-quality results, this drill produces accurate holes even at elevated speeds and feeds, delivering h8 hole tolerance. Its carbide construction provides durability for repeated use across common workshop materials, while the coating and geometry work together to minimize downtime and rework. Ideal for engineers, machinists, and hobbyists seeking a dependable, versatile small-diameter drill that fits standard equipment and delivers repeatable performance.