Drill bit Tvardy HSS M2 4.2 mm black-gold extended for metal

Drill bit Tvardy HSS M2 4.2 mm black-gold extended for metal is a high-speed steel cutting tool designed for drilling stainless and mild steels. Its M2 HSS construction provides balance between hardness and toughness for general metalworking, while the extended length enables deeper holes and access to recessed or hard-to-reach locations. The black-gold coating reduces friction and supports more efficient chip evacuation during continuous drilling tasks. The bit fits standard drill chucks and is suitable for workshop, maintenance and fabrication environments where durable, reliable metal drilling is required.

Advantages

The HSS M2 material offers wear resistance and maintains cutting edge strength at elevated temperatures typical of metal drilling. Extended length gives greater reach without changing tooling, and the black-gold coating lowers friction to reduce heat build-up and improve chip flow. Ground flutes and a precision-cut point ensure consistent centering and smoother penetration in steel. The bit is compatible with common cordless and corded drills equipped with standard chucks.

Suitable for

• Drilling holes in stainless steel and mild steel sheets and plates
• Maintenance and repair work requiring deeper or recessed holes
• Fabrication tasks in workshops and small manufacturing runs
• Use with standard drill chucks on corded and cordless drills

Key specifications

• Material: High-speed steel (HSS M2)
• Diameter: 4.2 mm
• Coating: Black-gold friction-reducing finish
• Length: Extended / extra-reach geometry for deeper holes
• Point type: Precision-ground tip for centering and smooth penetration
• Flute: Ground flutes for efficient chip removal

How to use

Secure the drill bit in a standard drill chuck and tighten firmly. Use appropriate spindle speed and feed rate for the workpiece material — lower speeds and steady feed for stainless steel to avoid overheating. Apply cutting fluid or lubricant when drilling stainless or thicker steel to improve tool life and chip evacuation. Start drilling with light pressure to establish the hole, then increase pressure evenly while maintaining alignment. Regularly clear chips from the hole to prevent clogging and reapply lubricant as needed.

Usage recommendations

For best results, match drill speed and lubricant to the specific steel grade being drilled. Begin with pilot holes where high accuracy or deep penetration is required. Replace the bit when wear or chipping reduces cutting performance to avoid workpiece damage.