Drill bit for metal Tvardy 10.0 x 340 mm HSS long, DIN 1869

Long HSS metal drill bit Tvardy 10.0 x 340 mm produced to DIN 1869 standards. Constructed from high-speed steel (HSS) for wear resistance and consistent cutting performance when drilling steel and other ferrous metals. With a 10.0 mm cutting diameter and 340 mm overall length, this long drill bit is designed to reach deeper holes while maintaining rigidity and chip evacuation suitable for metal fabrication, maintenance and machinery repair tasks.

Advantages

The HSS material offers improved hardness and heat resistance compared with standard carbon steel, extending tool life under regular drilling conditions. Manufactured to DIN 1869 dimensional and tolerance parameters, the bit provides predictable fit and performance in chucks and drill holders. The long overall length enables access to recessed or deep locations without requiring extensions, while the geometry is optimized for effective chip removal and stable drilling in ferrous materials.

Suitable for

• Deep-hole drilling in steel and other ferrous metals
• Metal fabrication and workshop machining
• Maintenance, repair and machinery servicing
• Use with pillar drills, bench drills and appropriate hand-held drills with proper holding

Key specifications

• Material: High-speed steel (HSS)
• Standard: DIN 1869
• Cutting diameter: 10.0 mm
• Overall length: 340 mm
• Suitable workpiece: Steel and other ferrous metals
• Geometry: Long-drill design for improved chip evacuation and reach

How to use

Select a drill press or hand-held drill with a chuck capable of securely holding a 10.0 mm shank and ensure the machine has sufficient rigidity for long-reach drilling. Mark the drilling point and use a center punch if necessary to prevent walking. Start at a low cutting speed appropriate for HSS and the workpiece thickness, apply steady feed pressure, and allow the tool to cut without excessive force. Use cutting fluid or coolant when drilling steel to reduce heat, improve tool life, and aid chip evacuation. Retract periodically in deep holes to clear chips and avoid clogging.

Usage recommendations

For best results, use appropriate cutting speeds for HSS in steel, apply cutting fluid, and ensure secure clamping of both workpiece and tool. Avoid excessive side loads and high feed rates that can cause premature wear or breakage. When drilling deep holes, periodically withdraw the bit to clear chips and maintain cooling.