Dormer Pramet A125 6.50 mm x 200 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 6.50 mm x 200 mm HSS straight shank drill — a purpose-built solution for professionals who demand precision, reach, and reliability in deep-hole drilling. Designed to perform across a range of materials, this drill delivers consistent starts, true holes, and dependable longevity in tough workshop environments.

Why this drill stands out

• 118° conventional point — a strong, stable tip that starts cleanly and resists wandering. The geometry also lends itself to easy re-grinding, so you can refresh sharpness in-house and extend tool life between replacements.
• Steam oxide finish — an anti-adhesion coating that minimizes built-up material on the cutting edge, reducing friction and helping you preserve edge geometry during prolonged drilling sessions.
• Extra long length (200 mm) — engineered for deep holes and applications where extra reach is essential. This isn’t just longer—it’s designed to maintain rigidity and cutting performance throughout the full length, so you can drill deeper without sacrificing accuracy.
• Premium HSS material — high-speed steel optimized for versatility, capable of drilling steel, aluminum, and stainless steel with dependable performance and a long service life in typical workshop conditions.
• Straight shank — broad compatibility with most chucks and collets, delivering solid grip and repeatable accuracy across machines and setups. The straight shank is ideal for drilling in benches, mills, or drilling rigs where a stable, true bore is critical.
• BS 328 specification — built to match standard sizes and tolerances used in professional fabrication, ensuring predictable interchangeability with other components in the shop.

Ideal use scenarios

• Deep-hole drilling in structural steel, aluminum extrusions, and stainless steel where standard-length bits struggle to reach depth.
• Fabrication tasks that require extended reach into recesses, cavities, or through-holes in assemblies where space is limited.
• Maintenance and repair work in machinery housings or automotive components where accurate, straight holes are critical for fasteners and alignment.
• Prototyping and light production environments where the ability to re-sharpen and re-use the same drill bit reduces downtime and costs.

Practical guidance for best results

• Match the speed and feed to the material: use moderate to lower speeds for steel and stainless steel, with light lubrication to minimize heat buildup and prolong edge life.
• Start with a light pilot hole if the workpiece is particularly hard or glossy to prevent wandering, then advance to full-depth drilling.
• Maintain clear chip evacuation—especially in deep holes—by ensuring the drill is properly aligned and using pecking cycles if needed.
• Keep the cutting edges sharp: when re-grinding, preserve the 118° point geometry and maintain a true, perpendicular flute alignment for clean bores.

The Dormer Pramet A125 drill is a robust, versatile choice for workshops that tackle precision deep-hole work across a spectrum of materials. Its combination of a stable 118° point, steam oxide finish, extra-long reach, and premium HSS makes it a reliable workhorse for both routine and demanding fabrication tasks.