Drill bit for metal Tvardy HSS long 7.0 x 290 mm DIN 1869

Long HSS drill bit for metal by Tvardy, size 7.0 x 290 mm manufactured to DIN 1869. This high-speed steel (HSS) twist drill is designed for cutting through steel and common metal alloys. The long overall length and extended flute allow deeper hole drilling and improved access in fixtures or recessed workpieces. The bit is suitable for use in hand-held drills, drill presses and machine tooling that accept long-shank twist drills and is produced to metric dimensions for consistent fit and performance.

Advantages

The HSS material provides a balance of hardness and toughness suitable for general-purpose metal drilling, with heat resistance for sustained cutting at moderate speeds. The long 290 mm length offers extended reach beyond standard short drills, enabling through-holes and deep-pocket drilling without switching to specialized tooling. Manufactured to DIN 1869 dimensions, the bit has consistent geometry and shank sizing for reliable clamping and repeatable results in production or repair tasks.

Suitable for

• Drilling through mild steel, cast iron and common ferrous and non-ferrous alloys
• Deep-hole drilling where extended length is required
• Use in drill presses, bench drills and portable drills with appropriate chuck capacity
• Workshop, construction and metal fabrication tasks requiring metric-sized twist drills

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 7.0 mm
• Total length: 290 mm
• Standard: DIN 1869
• Point type: general-purpose twist point suitable for metal cutting
• Shank type: long straight shank for standard chucks

How to use

Secure the drill bit in the chuck so sufficient shank is clamped and runout is minimized. Select a suitable cutting speed and feed rate for the workpiece material and use cutting fluid or coolant when drilling steel or alloy to reduce heat and prolong tool life. Center-punch or pilot-drill for accurate hole placement in thin or hard materials. Apply steady, even pressure and withdraw periodically on deep holes to clear chips and allow coolant access.

Usage recommendations

For best results when drilling metal, use a proper lubricant, ensure the drill press or hand drill is rigid and well-supported, and replace the bit when excessive wear or chipping reduces cutting efficiency. Match drill speed to material hardness: lower speeds for harder alloys, higher speeds for softer metals.