Dormer Pramet A110 4.50 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

Meet the Dormer Pramet A110 4.50 mm HSS ST Straight Shank Long Series Drill DIN 340—the twist drill bit built for precision, depth, and dependable metalworking performance. With a robust design and thoughtful features, it’s the reliable choice when you need consistent holes in thicker workpieces or hard materials.

• 118-degree conventional point — a strong, self‑centering tip that stays on line and is easy to re‑grind, helping you maintain accuracy and reduce wandering in challenging materials.
• Steam oxide finish — creates a low-friction cutting edge that minimizes built‑up material on the flute, improving chip flow and reducing heat during longer drilling sessions.
• Long length series — designed for deeper holes and applications where extra reach is essential, enabling you to drill through thicker sections without changing bits.
• Premium HSS material — high-speed steel provides durability across a wide range of metals, including steel, aluminium, and stainless steel, while offering the ability to re-sharpen for extended life.
• DIN 340 compliance — engineered to standard dimensions for reliable compatibility with common drill drives and holders in both workshop and production settings.
• Versatility in one tool — suitable for hand-held drills and machine setups, making this long-series drill a practical fit for maintenance, fabrication, and DIY projects alike.

This A110 drill bit is ideal for metalworkers who regularly switch between materials and need a single, dependable bit that can tackle deep boreholes without compromise. Whether you’re assembling structural components, servicing machinery, or fabricating custom parts, its regrindable edge, combined with depth-ready geometry, helps you keep production moving smoothly.

In practice, you’ll notice smoother starts, reduced wandering on entry, and steadier cutting when drilling into tough metals. Pair it with appropriate speeds and feeds for the material at hand, and you’ll achieve clean holes with minimal workpiece deflection and lower tool wear over time.