Dormer Pramet R7131 3.30 mm CARBIDE TIALN 140 DEG CHAMFER DRILL

The Dormer Pramet R7131 3.30 mm carbide drill is engineered to create chamfered holes for standard metric threads in a single, reliable operation. With a 140-degree pilot and a 90-degree chamfer, it streamlines tapping prep by delivering the correct starting geometry as you drill.

Coated with Titanium Aluminium Nitride (TiAlN), this drill delivers longer life and steadier performance when working with tougher materials. Crafted from premium carbide, it handles a range of metals — including steel, aluminium, and stainless steel — making it a versatile tool for mixed-material projects and busy workshops.

• 140° pilot and 90° chamfer design: Creates chamfered holes ready for standard metric threads, reducing secondary finishing steps and ensuring consistent hole geometry for reliable tapping.
• TiAlN coating for longer life: Increases wear resistance and heat tolerance, extending tool life and maintaining performance when drilling harder materials.
• One-pass tapping-size hole prep: Optimized to reduce the number of operations by producing holes that are ready for tapping in a single pass, boosting workflow efficiency.

By combining precise chamfering, reliable hole sizing, and material versatility in one tool, the Dormer Pramet R7131 helps you speed up production, minimize tool changes, and achieve consistent, tapping-ready holes with confidence.