Dormer Pramet A125 4.00 mm x 160 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Engineered for deep-hole precision, the Dormer Pramet A125 4.00 mm x 160 mm HSS straight shank extra long drill is built to reach where standard bits stop. This high‑speed steel drill delivers consistent, clean holes in a variety of metals, making it a reliable choice for professional workshops, fabricators, and maintenance teams that regularly tackle long, straight bores.

• 118° conventional point — a robust tip that bites quickly and can be re-ground to extend tool life, helping you maintain accurate starts and minimize wandering in challenging materials.
• Steam oxide finish — a low-friction coating that reduces material sticking to the cutting edge, aiding smoother chip evacuation and cooler cutting during extended drilling sessions.
• Extra long length (160 mm) — designed for drilling very deep holes and applications where reach is critical, eliminating the need for adapters or multiple tools.
• Premium HSS material — versatile performance across steel, aluminum, and stainless steel, delivering dependable results in a broad range of machining jobs.
• Straight shank — compatible with standard drill chucks and collets, offering reliable grip and reduced runout for stable, precise drilling in drill presses and milling machines.
• BS 328 specification — built to the respected Dormer Pramet standards, ensuring compatibility with common workshop tooling setups and predictable performance.

Ideal use scenarios include deep-hole drilling in automotive components, metal fabrication, and maintenance tasks where access is limited or long reach is required. This drill excels in applications that demand consistent hole diameter and straight bore alignment, providing a durable option that stands up to repeated use and re-sharpening.

Practical tips for best results:

• Use peck drilling to clear chips when drilling long bores, reducing heat buildup and aiding smoother progress.
• Maintain steady feed and moderate cutting speeds appropriate for the chosen material to maximize tool life and hole quality.
• Apply cutting fluid or coolant as needed to minimize friction, especially when drilling stainless steel or other harder alloys.
• Inspect the tip periodically and re-sharpen when signs of wear appear to preserve precision starts and hole diameter.