Drill bit for metal Tvardy 8.0 x 305 mm HSS DIN1869 long

Long HSS drill bit Tvardy 8.0 x 305 mm is manufactured to DIN 1869 standards for use in metalworking. With an 8.0 mm cutting diameter and a 305 mm overall length, this drill bit is made from high-speed steel (HSS) to provide good wear resistance and heat tolerance during drilling operations. The geometry and length make it suitable for drilling through sheet metal, plates and other ferrous and non-ferrous metals using handheld drills or drill presses.

Advantages

The high-speed steel construction offers a balance of hardness and toughness for extended tool life in metal drilling. Conformity to DIN 1869 ensures consistent dimensions and tip geometry for reliable centering and chip evacuation. The extended overall length allows access to recessed or deep holes without the need for multiple setups. The drill is compatible with standard three-jaw chucks and common drilling equipment used in workshops and maintenance environments.

Suitable for

• Drilling through sheet metal and thin plates
• General metal fabrication and maintenance work
• Use with handheld electric drills and drill presses
• Creating through-holes in ferrous and non-ferrous metals

Key specifications

• Material: High-speed steel (HSS)
• Cutting diameter: 8.0 mm
• Overall length: 305 mm
• Standard: DIN 1869
• Intended use: Metal drilling, including sheet metal

How to use

Secure the drill bit in a suitable keyed or keyless three-jaw chuck, ensuring correct centering and firm clamping. Select an appropriate cutting speed and feed for the metal being drilled; lower speeds are recommended for harder steels while higher speeds can be used for softer non-ferrous metals. Use cutting fluid or lubricant to reduce heat and improve chip evacuation, especially for deeper holes. Drill with steady pressure, retracting occasionally to clear chips if necessary, and complete the hole while maintaining alignment to avoid wandering.

Usage recommendations

To extend tool life and improve hole quality, use appropriate cutting fluid, avoid excessive speed when drilling hard steels, and ensure the workpiece is securely clamped. Inspect the bit for wear and resharpen or replace it when cutting performance decreases.