Drill bit Tvardy HSS for metal 12.50 mm twist drill black-gold finish

Tvardy HSS 12.50 mm metal drill bit is a high-speed steel twist drill designed specifically for drilling into a variety of ferrous and non-ferrous metals. The 12.50 mm diameter and a black-gold surface finish improve wear resistance and support smoother chip evacuation during cutting. This drill bit is suitable for use in hand-held electric drills and drill presses and is intended for general metalworking, maintenance and fabrication tasks.

Advantages

The HSS material provides a balance of hardness and toughness for reliable cutting performance in metal. The black-gold surface finish reduces friction and helps protect the cutting edges from premature wear. The twist-flute geometry promotes efficient chip removal and stable drilling, while the standard shank diameter ensures compatibility with common drill chucks. The design supports repeatable hole quality and extended service life under normal workshop conditions.

Suitable for

• Drilling holes in mild steel and other ferrous metals
• Working with aluminium, brass and other non-ferrous metals
• General maintenance, repair and fabrication tasks
• Use in handheld drills and bench drill presses

Key specifications

• Material: High-speed steel (HSS)
• Working diameter: 12.50 mm
• Geometry: Twist/fluted point
• Surface finish: Black-gold coating for enhanced wear resistance
• Intended use: Metal drilling (ferrous and non-ferrous)

How to use

Select an appropriate drill speed for the material being drilled (lower speeds for harder steels, higher speeds for softer non-ferrous metals). Secure the workpiece firmly and use a center punch to mark the drilling position if precise placement is required. Install the drill bit into the chuck and tighten securely. Apply steady, even pressure and allow the drill bit to cut without excessive force; withdraw occasionally to clear chips when drilling deeper holes. Use cutting fluid or lubricant when drilling tougher steels to reduce heat and extend tool life.

Usage recommendations

For best results, match drill speed and feed to the metal type, use appropriate cutting lubricant for steel, and inspect the cutting edges before use. Replace the drill bit if wear or chipping is evident to maintain hole quality and safety.