Dormer Pramet A125 1/2 Inch x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Introducing the Dormer Pramet A125 1/2 Inch x 310 mm HSS Straight Shank Extra Long Series Drill BS 328—a purpose-built drill bit designed for professionals who need serious reach without sacrificing cutting performance. This is the tool that turns deep-hole tasks from a chore into a straightforward step in your workflow.

Why this drill stands out

• 118-degree conventional point with a robust tip that’s easy to re-sharpen, helping you maintain accurate starts and clean holes even after multiple regrinds.
• Steam oxide finish reduces friction and prevents workpiece material from sticking to the cutting edge, delivering smoother entry and better chip evacuation.
• Extra long length (310 mm) in the straight-shank series is specifically recommended for drilling very deep holes and for applications where increased reach is required—minimizing tool changes and improving efficiency.
• Premium HSS material supports reliable drilling across a range of common metals, including steel, aluminium, and stainless steel, making it a versatile choice for mixed-material projects.
• Straight shank design provides secure, compatible engagement with a wide variety of drilling machines and chucks, delivering dependable performance in both benchtop and stationary setups.
• Versatile industrial tool built for multiple applications using standard drilling machines, enabling you to tackle deep-hole tasks, production runs, or prototype work with confidence.

Practical use cases and outcomes

Whether you’re fabricating frames, working on automotive assemblies, or creating aerospace components, the A125 drill excels where depth and precision matter. Expect tight, true holes with reduced wander, shorter cycle times due to fewer tool changes, and consistent hole quality across long drilling sessions. The combination of a strong point, durable HSS core, and extended reach makes it ideal for:

• Deep-hole drilling in steel and stainless steel where standard-length bits fall short.
• Prototyping and production environments that demand reliable performance from a single, adaptable drill bit.
• Projects requiring precise starting accuracy and clean exit quality on a variety of metals.

Care, maintenance, and tips

To maximize tool life and performance, follow these best practices:

• Maintain the 118-degree point by re-sharpening with care to preserve cutting geometry and minimize drift.
• Use appropriate speeds and feeds for the material being drilled, and apply cutting fluid or light lubrication to reduce heat buildup.
• Inspect the straight shank for burrs or nicks between jobs to ensure secure chuck grip and trueHole accuracy.
• Store in a dry environment to protect the HSS core and retain the efficiency of the steam oxide finish.

Experience precise starts, deep-hole capability, and dependable performance with the Dormer Pramet A125 drill—the go-to choice when deep drilling and material versatility matter most.