Drill bit Tvardy HSS for metal 3.50 mm, black-gold finish (MPN T02035)

Tvardy HSS drill bit for metal, 3.50 mm diameter with a black‑gold finish. This high‑speed steel (HSS) cutting tool is intended for drilling through ferrous and non‑ferrous metals and general metalworking tasks. The 3.50 mm size provides precision for small‑diameter holes while the black‑gold surface helps reduce friction and improves chip evacuation during continued use. The bit is compatible with hand drills and drill presses commonly used in workshops, repair jobs and light production environments.

Advantages

The HSS material ensures effective hardness and heat resistance at typical drilling speeds, maintaining cutting performance when working with mild steel, aluminium and similar alloys. The black‑gold finish provides additional wear protection and reduces adhesion of chips on the cutting edges. The 3.50 mm diameter offers accurate hole positioning for fastening and assembly operations, and the shank is suitable for standard drill chucks used in manual and machine applications.

Suitable for

• Drilling pilot and through holes in thin to medium sheet metal
• Workshop repairs and maintenance tasks
• Metal fabrication and assembly of small components
• Hobby and DIY projects involving metalwork
• Use in hand drills and drill presses

Key specifications

• Material: high‑speed steel (HSS)
• Diameter: 3.50 mm
• Finish: black‑gold surface treatment
• Suitable materials: ferrous and non‑ferrous metals (mild steel, aluminium, brass)
• Typical use: manual and machine drilling

How to use

Select the 3.50 mm Tvardy HSS drill bit and secure it firmly in the drill chuck. Mark the drilling point and, if necessary, center‑punch to prevent walking. Use appropriate cutting speed and steady feed for the material being drilled; reduce speed and apply lubricant when working with harder steels to extend tool life. Withdraw the bit periodically to clear chips and prevent clogging. After use, clean chips from the flutes and store the bit in a dry place.

Usage recommendations

For best results, use cutting fluid on medium and hard steels and moderate speeds for prolonged durability. When drilling thin sheets, back the workpiece to avoid burrs and deformation. Inspect the cutting edges regularly and replace the bit when wear affects hole quality.