Drill bit Tvardy HSS M2 extended for metal 4.5 mm black‑gold finish

Tvardy extended HSS M2 drill bit for metal, 4.5 mm diameter with black‑gold finish is designed for drilling steel and a wide range of other metals. Made from high‑speed steel (HSS M2), the 4.5 mm cutting edge combines wear resistance and hardness suitable for general metalworking tasks. The extended flute length enables deeper holes and easier access in confined or recessed assemblies, and the black‑gold coating reduces friction and provides additional surface protection.

Advantages

The extended HSS M2 construction offers improved toughness and heat resistance compared with standard high‑speed steel, helping to maintain cutting edge integrity during continuous drilling in metal. The black‑gold finish lowers adhesion of chips and decreases friction for smoother penetration, while the 4.5 mm diameter delivers a balance between precision and material removal. Extended length allows reaching recessed drilling points without changing to specialized tooling.

Suitable for

• Drilling holes in mild and alloy steels
• Metal fabrication and repair work where deeper reach is required
• Use with hand drills and drill presses in workshops and light industrial settings
• Creating clearance holes or pilot holes for bolts and fasteners

Key specifications

• Material: High‑speed steel (HSS M2)
• Diameter: 4.5 mm
• Coating: Black‑gold finish for reduced friction and enhanced surface protection
• Geometry: Twist fluted design suitable for metal drilling
• Length type: Extended flute length for deep or hard‑to‑reach holes
• Typical mounting: Straight shank for standard drill chucks

How to use

Secure the drill bit in the chuck so the shank is held firmly and runout is minimised. Use an appropriate cutting speed and feed for the material being drilled; lower speeds are recommended for harder steels to avoid overheating. Apply cutting fluid or lubricant to the workpiece and drill bit to improve chip evacuation and extend tool life. For deep holes, withdraw the bit periodically to clear chips and allow cooling.

Usage recommendations

Use protective equipment and clamp the workpiece securely. Match drill speed and feed to the metal type, apply cutting fluid when drilling steels, and inspect the bit regularly for wear; replace if the cutting edge becomes dull or damaged to maintain hole quality and operator safety.