Drill bit for metal Tvardy HSS 5.50 mm – straight shank, black-gold finish

Tvardy HSS 5.50 mm drill bit for metal is made from high-speed steel and features a black-gold surface finish. It has a straight shank designed for use in handheld and bench drills that accept straight shank bits. Engineered for drilling steel and other ferrous and non-ferrous metals, this 5.50 mm bit provides a consistent hole diameter for metal fabrication, maintenance and mechanical repair tasks where precise metal drilling is required.

Advantages

The high-speed steel construction offers good wear resistance and cutting performance on metal. The black-gold surface finish reduces friction and helps with chip evacuation while extending the tool life under typical working conditions. The straight shank ensures stable clamping in standard chucks and easy compatibility with a wide range of drills. The 5.50 mm diameter provides a common, repeatable hole size for fittings, fasteners and assembly work.

Suitable for

• Drilling holes in steel and other ferrous metals
• Drilling in non-ferrous metals such as aluminum and brass
• Metal fabrication and sheet metal work
• Maintenance, mechanical repair and assembly tasks
• Use with handheld and bench drills equipped for straight shank bits

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 5.50 mm
• Shank type: straight shank
• Surface finish: black-gold coating
• Intended materials: ferrous and non-ferrous metals

How to use

Select a suitable drill and clamp the straight shank securely in the chuck. Mark the drilling point and, if necessary, center-punch to prevent walking. Use an appropriate cutting speed and feed for the metal being drilled and apply steady pressure without forcing the bit. For steel and hard materials, use cutting fluid to reduce heat and improve chip evacuation. Withdraw the bit occasionally to clear chips and maintain a clean cutting edge.

Usage recommendations

For best results when drilling steel, use a moderate speed and appropriate cutting lubricant; avoid excessive heat buildup to preserve bit life. Replace the bit if signs of dulling or excessive wear are observed to maintain hole quality and reduce risk of breakage.