Ronix HSS-Co Cobalt Drill Bit 8mm, 5% Cobalt M35 Steel, DIN 338 Standard RH-5518

The Ronix RH-5518 is a high-performance industrial drill bit specifically engineered for drilling through hard and abrasive metals, such as stainless steel, high-tensile steel, and cast iron. Forged from premium M35 High-Speed Steel with 5% Cobalt, this bit is designed to maintain its structural integrity and cutting efficiency under extreme heat and friction. Manufactured to the strict DIN 338 industrial standard, it features an 8mm diameter and a 117mm length, making it a robust choice for both handheld and stationary machine drilling.

The RH-5518 is subjected to an advanced hardening process, achieving an elite 65-67 HRC hardness rating. This ensures the precision-ground cutting edges stay sharp longer and provide a stable, precise start without “walking” on the material surface. With its specialized bright finish for smooth chip evacuation and rust resistance, and a universal round straight shank that fits all standard chucks, the Ronix RH-5518 is an essential tool for achieving professional-grade results in heavy-duty construction and metalworking projects.

Features

• Premium M35 Cobalt Alloy: Contains 5% Cobalt to provide superior thermal stability and wear resistance when drilling through tough metals.
• Extreme Edge Hardness: Hardened to 65-67 HRC, ensuring the blade remains sharp through repeated industrial use.
• DIN 338 Standard Precision: Manufactured according to international standards to ensure consistent sizing and high-quality geometry.
• Precision-Ground Tip: Sharpened cutting edges enable precise starting and clean, accurate holes with minimal burrs.
• High-Heat Resistance: Specifically designed to withstand the high temperatures generated by drilling into stainless and alloy steels.
• Anti-Rust Bright Finish: Features a smooth coating that facilitates faster chip removal and protects the bit from corrosion.
• Universal Round Shank: Designed for quick changes and a secure fit in all electric and cordless power tool chucks.
• Professional Versatility: Ideal for a wide range of materials, including hard metals, plastics, and dense wood.