Dormer Pramet R7131 8.50 mm CARBIDE TIALN 140 DEG CHAMFER DRILL

The Dormer Pramet R7131 8.50 mm carbide drill with TiAlN coating is engineered to create chamfered holes for standard metric threads in a single, efficient pass. Its combined 140° pilot and 90° chamfer geometry lets you drill and chamfer at the same time, simplifying setup and reducing finishing steps on every tapping-size hole.

Built on premium carbide and enhanced with a Titanium Aluminium Nitride coating, this drill delivers longer tool life and steadier performance when you work with harder materials. The engineered pilot diameter and length are designed to produce the correct hole size and depth for standard threads, while maintaining compatibility with a wide range of metals, including steel, aluminium, and stainless steel.

• Chamfer-ready geometry: 140° pilot with a 90° chamfer lets you drill and chamfer in one pass, delivering thread-ready holes with clean edges and fewer secondary operations.
• TiAlN-coated carbide for durability: The TiAlN coating enhances wear resistance and heat tolerance, extending tool life and maintaining performance on tougher materials.
• Precisely sized pilot and length: Carefully engineered dimensions ensure the hole matches tapping-size requirements, reducing rework and improving hole quality across compatible metals.

This combination of precise geometry, durable coating, and material versatility helps streamline fabrication workflows, cut down downtime, and deliver reliable, consistent results across steel, aluminium, and stainless steel projects.