The Dormer Pramet A125 9.50 mm x 310 mm HSS straight shank drill is purpose-built for deep, precise drilling tasks where reach matters as much as accuracy. With its extra-long length, this drill bit clears long bores and hard-to-reach pockets in a single, clean operation, making it ideal for fabrications, automotive work, and heavy-gauge metalworking.

Key features that matter in real-world use

• 9.50 mm diameter x 310 mm overall length for exceptional reach in deep holes and through-thickness drilling where shorter bits fall short.
• 118-degree conventional point provides a robust starting tip that resists wandering and is easy to re-sharpen, reducing downtime on the shop floor.
• Steam oxide finish minimizes workpiece material adhesion to the cutting edge, enhancing chip flow and reducing built-up edge during prolonged drilling sessions.
• Premium HSS material delivers reliable performance across a range of metals—steel, aluminium, and stainless steel—while handling repeated regrinding without significant loss of geometry.
• Extra long length series is purposefully chosen for applications where increased reach is required, helping you drill deep holes without changing tools mid-project.
• ST straight shank design ensures broad compatibility with standard drill chucks and fixtures, offering dependable grip and straightforward setup.

Why this drill bit fits your workflow

• Perfect for drilling deep bores in automotive components, hydraulic housings, or thick metal plates where access is limited.
• Versatile across materials and machines—compatible with drill presses, CNC machines, and handheld drills, provided the chuck can accommodate a straight shank.
• BS 328 compliance signals adherence to established dimensional and performance expectations, giving you confidence in repeatable results.

Practical tips to maximize life and accuracy:

• Keep a steady feed rate and avoid excessive pressure to reduce heat buildup, preserving the 118° point geometry longer.
• Lubricate appropriately for metal drilling to improve chip evacuation and edge life, especially when working with stainless steel and high-strength alloys.
• Re-sharpen the tip as needed when signs of dullness appear—this maintains starting torque and reduces wandering on entry.

Designed for professionals who demand precision and endurance from a single drill solution, the Dormer Pramet A125 9.50 mm x 310 mm HSS straight shank drill blends long-reach capability with robust cutting performance. It’s the reliable choice when you’re committed to clean holes, minimal tool changes, and consistent results across challenging drilling projects.