Dormer Pramet A125 9.50 mm x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 9.50 mm x 250 mm HSS straight shank drill—a purpose-built solution for precision drilling where depth matters. Designed to conquer long-through holes, this extra-long series drill combines a reliable 118-degree conventional point with a robust, grind-friendly tip, delivering fast, clean starts that stay on path even in tough materials.

Why this drill stands out

• 118° conventional point for a strong, easily re-sharpened tip that bites into metal reliably and maintains a long cutting life.
• Steam-oxide finish reduces friction and prevents workpiece material from sticking to the cutting edge, promoting smoother chip evacuation and less heat buildup.
• Extra-long length (250 mm) in the straight-shank design—perfect for deep, blind holes, cavities, or applications where you need extended reach without a tool adapter or extension.
• Premium HSS material capable of drilling a wide range of metals, including steel, aluminium, and stainless steel, making it a versatile workhorse in any shop.

Ideal applications and use cases

Whether you’re assembling automotive components, fabricating steel structures, or creating prototypes in a machine shop, this drill excels wherever depth and reach are non-negotiable. The straight-shank design simplifies tool setup on standard drill presses, CNC machines with appropriate collets, or hand-held drills equipped with a compatible chuck. Its durable HSS construction ensures dependable performance across metals with varying hardness, from mild steels to stainless grades.

Practical guidance for best results

• Match spindle speed and feed rate to the material being drilled—start with a conservative speed on harder metals and increase gradually as you verify chip formation and heat generation.
• Use proper workholding and center-punching to ensure an accurate starting point, especially when drilling deep holes where drift can occur.
• Maintain a clear, controlled cutting environment with adequate lubrication to extend edge life and improve hole quality on stainless and hardened steels.
• Plan for chip evacuation with deep holes; ensure the hole path remains unobstructed to prevent re-cutting and more heat.

Who benefits most

Machine shops, fabrication shops, and DIY enthusiasts tackling projects that require long reach without compromising hole integrity will find the Dormer Pramet A125 drill indispensable. It’s a reliable, versatile choice for regular metalworking tasks that demand precise depth control and durable performance over time.