Drill bit Tvardy HSS M2 4.8 mm black-gold extended for metal

Tvardy HSS M2 4.8 mm black-gold extended drill bit is a high-speed steel drill designed for making precise 4.8 mm holes in steel and other metals. The extended-length geometry provides extra reach for deeper drilling tasks while the black-gold surface treatment reduces friction and improves chip evacuation. This drill bit is compatible with standard hand drills and drill presses and is intended for general metalworking applications where a durable, straight-cutting tool is required.

Advantages

The HSS M2 material offers good hardness and wear resistance at cutting temperatures typical for metal drilling. The black-gold coating helps to reduce heat build-up and sticking, extending the usable life of the bit and maintaining edge sharpness. The extended length permits drilling into recessed areas or through thicker workpieces without the need for extension adapters, while a conventional straight shank ensures secure clamping in standard chucks.

Suitable for

• Drilling 4.8 mm holes in steel and iron-based metals
• Drilling holes in non-ferrous metals such as aluminum and brass
• Deep or recessed holemaking where extra reach is required
• Use with hand drills and drill presses for workshop and maintenance tasks

Key specifications

• Material: High-speed steel (HSS M2)
• Diameter: 4.8 mm
• Length type: Extended length for deeper reach
• Coating: Black-gold surface treatment for reduced friction
• Shank: Straight shank for standard drill chucks
• Intended use: Metalworking (ferrous and non-ferrous metals)

How to use

Mark the drilling position and secure the workpiece to prevent movement. Select appropriate cutting speed for the material being drilled—lower speeds for harder steels, higher speeds for softer non-ferrous metals. Use cutting lubricant or coolant when drilling steel to reduce heat and improve chip removal. Align the drill bit perpendicular to the surface, apply steady pressure, and clear chips regularly to avoid clogging. After drilling, withdraw the bit slowly while the spindle is still turning to break chips cleanly.

Usage recommendations

For best results, pre-drill with a smaller pilot where accuracy is critical, and use an appropriate cutting fluid when working with stainless or hardened steels. Inspect the bit for wear before use and replace when the cutting edges become dull or chipped to maintain hole quality and reduce risk of breakage.