Drill bit for metal Tvardy HSS long 4.0 x 280 mm DIN1869

Long HSS drill bit for metal Tvardy HSS long 4.0 x 280 mm DIN1869 is a high-speed steel twist drill designed to cut steel and other metals where extended reach is required. With a nominal diameter of 4.0 mm and an overall length of 280 mm, this drill bit is manufactured to DIN 1869 dimensions for long drill geometry and consistent compatibility with hand-held drills and drill presses. It is available in bulk packaging options and is intended for through-holes and deep-hole drilling tasks.

Advantages

The Tvardy HSS long 4.0 x 280 mm DIN1869 drill bit offers durable high-speed steel construction that maintains hardness and cutting ability at elevated temperatures typical for metal drilling. Its long geometry provides extended reach for deep or hard-to-access holes while preserving concentricity and straightness. Manufactured to DIN 1869, the bit delivers predictable dimensions and fitment in standard chucks and holders. The design supports efficient chip evacuation in many metal drilling applications when combined with appropriate speeds and lubrication.

Suitable for (tasks / use cases)

• Drilling through-holes in steel plates, profiles and sheet metal
• Deep-hole drilling where extended reach is necessary
• Use with hand-held electric drills and drill presses
• General metalworking in workshops and industrial settings

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 4.0 mm
• Overall length: 280 mm
• Geometry: Long drill according to DIN 1869
• Suitable for: Steel and other ferrous and non-ferrous metals
• Packaging options: Bulk packs (50 / 100 / 200 pieces)

How to use

Select a compatible chuck or collet that securely holds a 4.0 mm shank. Clamp the workpiece firmly and, where possible, use a center punch to mark the drilling point. Start at a low speed to establish the hole and then increase RPM according to material and drill diameter, using recommended cutting speeds for HSS in metals. Apply appropriate cutting fluid or lubricant to reduce heat and improve chip evacuation. Use steady axial feed pressure and back the drill periodically on deep holes to clear chips.

Usage recommendations

For best results when drilling steel and harder metals, use cutting fluid, keep spindle speeds within recommended HSS ranges, and avoid excessive feed that can cause breakthrough chipping. Inspect the bit for wear before use and replace when cutting performance or hole quality deteriorates.