Discover the Dormer Pramet A125 6.00 mm x 400 mm HSS ST Straight Shank Extra Long Series Drill BS 328 — a purpose-built long‑reach drill designed for precision metalworking where depth and reach matter as much as the cut itself.

Why this drill stands out

• 118° conventional point — delivers a strong, self‑centering tip that starts holes true and remains easy to re‑grind when sharpening is needed, maximizing productivity between tool changes.
• Steam oxide finish — a steady, low‑friction surface that helps reduce built‑up edge and sticking, promoting cleaner starts and smoother hole quality in a variety of metals.
• Extra long length (400 mm) — specifically engineered for deep holes and applications where reach is critical. Ideal for automotive housings, machinery frames, mold blocks, or any workpiece with internal cavities or long channels.
• Premium HSS material — high‑speed steel combines hardness and toughness that perform well across steel, aluminum, and stainless steel, providing reliable drilling performance in mixed material setups.
• Straight shank design — compatible with standard drill chucks and the BS 328 mounting standard, ensuring solid clamping and minimal runout during extended reach drilling.

Optimal use cases

• Long‑reach holes in engine blocks, transmission housings, and heavy machinery components where shorter drills cannot reach.
• Fabrication work requiring deep bore holes in steel plate, aluminum alloys, or stainless components.
• Maintenance and repair tasks that demand one drill bit to cover multiple depths without changing tools frequently.

Practical guidance for best results

• Use appropriate speeds and feeds for the material being drilled; start at conservative settings and increase gradually as the cut progresses to prevent overheating.
• Apply a light lubricating fluid for metals to extend drill life and improve surface finish, especially when drilling stainless steel or harder alloys.
• Keep the bit True and steady; gentle pecking cycles help clear chips when drilling deep holes with an extra‑long drill.

Whether you’re building, repairing, or fabricating, the Dormer Pramet A125 6.00 mm x 400 mm HSS ST Straight Shank Extra Long Series Drill BS 328 is designed to deliver dependable depth, consistent hole quality, and the versatility you rely on in demanding metalworking environments.