Drill bit for metal Tvardy HSS 6.50 mm, black-gold finish

The Tvardy HSS 6.50 mm drill bit for metal features a black‑gold surface treatment and is made from high‑speed steel (HSS). Designed for drilling steel and other ferrous and non‑ferrous metals, it delivers consistent performance for through holes and clearance holes in metal components. The bit is available in assorted pack counts suitable for workshops, industrial environments and maintenance operations that require precise and repeatable metal drilling.

Advantages

The HSS material provides high hardness and wear resistance at elevated cutting speeds, while the black‑gold finish reduces friction and helps resist corrosion. Its 6.50 mm diameter gives a standard size for many mechanical and fabrication tasks, and the ground flute geometry supports efficient chip evacuation and stable drilling. The tool is compatible with common drill chucks and standard drilling equipment used in workshops and production settings.

Suitable for

• Drilling through and clearance holes in steel
• Work on non‑ferrous metals such as aluminum and brass
• General maintenance and repair tasks in workshops
• Light to medium industrial fabrication and assembly

Key specifications

• Material: high‑speed steel (HSS)
• Diameter: 6.50 mm
• Surface treatment: black‑gold finish for reduced friction and enhanced corrosion resistance
• Intended use: drilling ferrous and non‑ferrous metals
• Geometry: twisted/fluted design for chip removal and stable drilling
• Packaging options: assorted pack counts suitable for workshop and industrial supply

How to use

Secure the drill bit in a properly rated chuck, ensuring it is centered and clamped firmly. Select an appropriate cutting speed and feed for the workpiece material—slower speeds for harder steels and higher speeds for softer non‑ferrous metals. Use a cutting fluid or lubricant when drilling steel to extend tool life and improve hole quality. Apply steady pressure without forcing the bit; allow the tool to cut and evacuate chips. Retract periodically when drilling deep holes to clear chips and avoid overheating.

Usage recommendations

For best results, match drill speed and lubrication to the specific metal being drilled, inspect the bit before use for wear or damage, and replace the bit when cutting performance or hole finish degrades.