Dormer Pramet A125 3/16 Inch x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

The Dormer Pramet A125 3/16 Inch x 310 mm HSS Straight Shank Extra Long Series Drill (BS 328) is engineered for deep-hole precision with lasting performance. This high-speed steel drill combines a robust 118-degree conventional point, a steam oxide finish, and an extra-long reach to handle challenging projects where depth and control matter most.

Why this drill stands out

• 118° conventional point — delivers a strong, centered start and maintains stability in tough materials. The point’s geometry makes it easier to re-grind, extending the tool’s usable life when re‑sharpening is necessary.
• Steam oxide finish — reduces friction and minimizes material adhesion at the cutting edge, helping to prevent built-up edge and promoting smoother, cleaner holes.
• Extra long length (310 mm) — designed for drilling very deep holes and reaching into challenging workpieces where standard drills can’t reach, without compromising rigidity.
• Premium HSS material — versatile enough to drill a broad range of metals, including steel, aluminium, and stainless steel, delivering reliable performance across everyday fabrication tasks.
• Straight shank design — ensures broad compatibility with a variety of machines and chucks, providing stable clamping and predictable hole quality.

Ideal use cases

• Deep-hole drilling in metalwork, automotive components, and machinery housings where access is limited.
• Through-holes and deep blind holes in steel, aluminum, and stainless steel using standard drill chucks and drill presses.
• Prototyping or repeated-gauge projects where consistent hole diameter and precision are critical.

What you can expect in practice

This drill is built to deliver dependable performance across a range of everyday metalworking scenarios. The combination of an easy-to-regrind point, a friction-reducing finish, and an extended reach translates to fewer tool changes, cleaner hole starts, and smoother chip evacuation in tall workpieces. Its versatile HSS composition means you don’t have to switch tools when switching from steel to aluminum, making it a practical addition to any shop’s drill-bit lineup.