Drill bit Tvardy HSS for metal 4.00 mm, black-gold finish, model T02040

Tvardy HSS drill bit for metal, 4.00 mm diameter, with a black-gold surface finish designed for workshop and industrial use. Manufactured from high-speed steel (HSS), this straight-shank bit is intended for drilling precise holes in steel and other ferrous and non-ferrous metals. The drill geometry and material selection provide a balance of hardness and toughness suitable for general metalworking tasks and maintenance applications.

Advantages

The HSS construction ensures good heat resistance and edge retention during continuous drilling operations. The black-gold finish improves surface protection against corrosion and can reduce friction between the drill and workpiece. The straight shank design fits standard drill chucks, enabling compatibility with a wide range of handheld and bench-mounted drills. The 4.00 mm diameter offers a common size for pilot holes and fastening applications.

Suitable for

• Drilling holes in mild and medium-hard steels
• Work on non-ferrous metals such as aluminium and brass
• Metal fabrication, assembly and repair tasks
• Workshop and maintenance operations using standard drill chucks

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 4.00 mm
• Shank type: Straight shank for standard chucks
• Surface finish: Black-gold coating for corrosion resistance and reduced friction
• Intended use: Drilling in ferrous and non-ferrous metals

How to use

Secure the drill bit firmly in the chuck of a handheld or bench drill, ensuring correct centring and tight clamping. Select an appropriate drill speed for the material being worked: generally medium to high speeds for non-ferrous metals and lower speeds for harder steels. Use cutting fluid or lubricant when drilling steel to extend bit life and improve hole quality. Apply steady pressure and allow the bit to cut without forcing; withdraw periodically to clear chips when drilling deeper holes.

Usage recommendations

For best results, match drill speed and feed rate to the workpiece material and use a suitable cutting fluid when drilling steel or stainless materials. Inspect the bit for wear or dulling before use and replace when performance deteriorates to avoid damaging the workpiece or slowing operations.