Dormer Pramet A125 13/64 Inch x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 13/64 inch diameter, 250 mm long HSS straight shank drill—an extra-long, all-purpose solution engineered for deep-hole work and demanding fabrication tasks. Built to tackle complex holes without compromising precision, this drill blends robust materials with thoughtful design for reliable performance across a range of metals.

Key features that matter in real-world machining

• for a strong, self-centering tip that’s easy to re-sharpen, promoting clean starts and reduced wandering when you drill from a standing start.
• Steam oxide finish minimizes material sticking to the cutting edge, helping chips break away more smoothly and extendingDrill life in tough workpieces.
• Extra-long length (250 mm) designed for drilling very deep holes and reaching into recessed areas, cavities, or assemblies where standard drills simply won’t reach.
• Premium HSS (high-speed steel) delivers dependable performance across a variety of materials—steel, aluminium, and stainless steel—without sacrificing durability or edge retention.
• Straight shank ensures reliable grip in most drill chucks and holders, making this drill a versatile addition to both professional workshops and home shops.
• BS 328 compliance means predictable sizing and compatibility with common industrial standards, helping you plan fixtures and tooling with confidence.

Why this drill stands out in its class

Many drills cap performance at shallow depths or rely on shorter lengths that force extra setups. The A125’s extra-long geometry removes those bottlenecks, enabling you to drill deeper holes with a single tool, reducing tool changes and setup time. The 118° point design facilitates easier centering on the first cut, which is especially valuable when working with thicker materials or close-tolerance applications. The steam oxide coating further enhances chip flow and reduces the build-up that can degrade edge quality over time.

Ideal uses and practical tips

• Great for deep pocketing in steel, stainless, and aluminum during fabrication, maintenance, or assembly work.
• In machine tools with standard collets or chucks, pair this drill with light cutting fluids or oils when drilling steel to extend edge life and improve surface finish.
• Start with a small pilot hole if the workpiece is particularly hard or tied up with burrs, then feed progressively to prevent deflection on the long drill length.
• Secure the workpiece firmly and consider additional support or a backer board to minimize wobble when you’re drilling at maximum reach.

As a trusted Dormer Pramet tool, this A125 drill brings professional-grade reliability to a familiar, versatile form factor. It’s the kind of drill bit you reach for when you need precision, depth, and dependable performance in a single, straightforward solution.