Dormer Pramet A125 3.50 mm x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 3.50 mm x 250 mm HSS ST Straight Shank Extra Long Series Drill BS 328 — a purpose-built solution for deep-hole drilling that professionals rely on for reliability and reach. This precision drill bit blends a robust cutting geometry with a long body, enabling accurate, repeatable results in demanding setups.

Why this drill stands out

The 118-degree conventional point provides a strong starting edge that bites cleanly into workpieces and remains easy to re-sharpen, extending the tool’s usable life. The steam oxide finish on the HSS surface reduces built-up edge and minor sticking, promoting smoother feeds and steadier hole quality across materials.

Designed for depth, the Extra Long length of 250 mm (with a 200 mm flute length) unlocks reach in cavities, long brackets, and deep pockets where standard-length bits can’t reach. The 10xD usability means you can drill deep holes in a single pass in many common steels, alloys, and non-ferrous materials without constant pecking or tool changes.

Made from premium HSS, this drill bit handles a broad range of materials—from carbon steel to aluminium and stainless steel—making it a versatile addition to mixed-material fabrication shops. The straight shank ensures dependable compatibility with a wide spectrum of machines and chucks, from benchtop drills to more capable workshop setups.

Ideal applications and scenarios

Use cases span automotive fabrication, equipment maintenance, and general fabrication tasks where deep, precise through-holes are required. Whether you’re building a frame, servicing machinery, or creating long-through holes in assemblies, this A125 series drill provides consistent performance with minimal setup adjustments.

Specifications at a glance

• Product name: Dormer Pramet A125 3.50 mm x 250 mm HSS Straight Shank Extra Long Series Drill BS 328
• Diameter: 3.50 mm
• Overall length (OAL): 250 mm
• Flute length: 200 mm
• Shank: Straight
• Point angle: 118° conventional
• Material: High-speed steel (HSS)
• Finish: Steam oxide (steam tempered)
• Standard: BS 328
• Use depth: 10xD
• Series: A125

Equip your workshop with the Dormer Pramet A125 and experience dependable deep-hole drilling performance that shines across steel, aluminium, and stainless steel projects. A trusted choice for precision, reach, and durability in one compact tool.