Drill bit Tvardy HSS for metal 3.30 mm, black-gold finish, model T02033

Tvardy HSS drill bit for metal, 3.30 mm diameter, black-gold finish. This high-speed steel bit is engineered for drilling steel and other ferrous and non-ferrous metals, offering durability and consistent cutting performance in workshop, maintenance and fabrication environments. The black-gold surface treatment improves wear resistance and reduces friction during drilling, while the 3.30 mm diameter provides a precise hole size for fastening and pilot-drilling operations. Compatible with standard corded and cordless drills as well as handheld drivers that accept round or hex shanks.

Advantages

The HSS material provides good heat resistance and edge retention when drilling metals. The black-gold finish adds a protective layer that helps reduce wear and galling, extending tool life under typical workshop conditions. The 3.30 mm diameter gives accurate pilot holes for screws and bolts and is suitable for sequential hole-sizing when used with larger bits. The geometry and manufacturing tolerances ensure stable performance and reliable centering when used with appropriate drill chucks.

Suitable for

• Drilling holes in steel and iron
• Pilot holes for tapping and fastening
• Fabrication and light to medium workshop metalworking
• Maintenance and repair tasks on machinery and equipment

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 3.30 mm
• Surface finish: black-gold coating for reduced friction and improved wear resistance
• Intended use: metal drilling (ferrous and non-ferrous)
• Compatibility: standard drill chucks and handheld drivers

How to use

Select the appropriate drill speed and feed based on the metal type and thickness; lower speeds are recommended for harder steels. Secure the workpiece and mark the drilling point. Use cutting fluid or lubricant for improved cooling and chip evacuation when drilling thicker or harder materials. Start drilling with light pressure until the tip has a secure seat, then maintain steady pressure and speed. Retract periodically to clear chips if drilling deep holes. After use, clean the bit to remove debris and apply a light protective oil if storing for extended periods.

Usage recommendations

For best results, use the 3.30 mm bit as a pilot or finishing drill for small-diameter fasteners. Match drill speed and lubrication to the material: lower RPM and cutting fluid for hardened steel, higher RPM for softer metals. Inspect the bit for wear or dulling before critical tasks and replace if performance declines.