Cobalt Drill Bit Set for Stainless Steel

Cobalt Drill Bit Set for Stainless Steel

The Alliance Tools Cobalt Drill Bit Set represents the pinnacle of drilling technology for challenging materials. Each drill in this comprehensive set has been engineered to deliver exceptional performance when working with stainless steel, Inconel, titanium, and other heat-resistant alloys that typically cause rapid wear in standard HSS drills.

Superior Cobalt-Infused Material

At the heart of these drill bits is a premium M42 high-speed steel alloy with 8% cobalt content. This specialized material composition provides several critical advantages:

• Enhanced red hardness that maintains cutting edge integrity at temperatures up to 650°C
• Superior wear resistance when drilling abrasive materials
• Increased toughness that prevents chipping when encountering hard spots in the workpiece
• Excellent resistance to heat checking and thermal cracking during interrupted cuts
• Consistent performance even under heavy-duty machining conditions

Precision-Engineered Geometry

Each drill features a carefully engineered 135° split point design that delivers several key advantages:

• Immediate bite into hardened materials without walking or wandering
• Self-centering capability that eliminates the need for center punching
• Reduced thrust requirements, minimizing operator fatigue during extended use
• Improved chip breaking for cleaner holes and reduced clogging

Specialized Web Thinning

The web thinning process applied to these drills creates a specialized geometry that:

• Reduces thrust requirements by up to 40% compared to standard drills
• Maintains structural integrity even when drilling tough materials
• Improves chip flow through the flutes, preventing binding
• Enables faster penetration rates in hardened materials

Comprehensive Size Range

This set includes 15 drills covering the most commonly used diameters for precision work. The complete size range includes: 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm, 9mm, and 10mm.

Gold Oxide Finish

The specialized gold oxide surface treatment applied to each drill provides multiple performance benefits:

• Increased surface hardness for improved wear resistance
• Reduced friction during drilling operations
• Enhanced chip evacuation through the flutes
• Visual indication of heat buildup during operation
• Resistance to corrosion and oxidation

Durable Storage Solution

The entire set comes housed in a robust metal index case with individually sized slots for each drill. This storage solution not only protects the drills from damage but also allows for quick identification and selection of the required size. The case features a secure latch mechanism and folding design for compact storage in toolboxes or workshop drawers.