Dormer Pramet A125 11/64 Inch x 200 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

The Dormer Pramet A125 11/64 Inch x 200 mm HSS ST Straight Shank Extra Long Series Drill BS 328 is built for precision deep-hole work and dependable performance in a single, long-reach tool. If you’ve encountered short bits that can’t reach the depth you need, this extra-long drill bit delivers the clearance and stability required to drill clean, accurate holes from thick materials to tight spots.

• 118-degree conventional point provides a strong, self-centering entry that stays true on initial contact and is simple to re-grind when needed, reducing the risk of wandering during start-up.
• Steam oxide finish minimizes material sticking to the cutting edge, helping chips break cleanly and extending tool life in demanding drilling tasks.
• Extra-long length (200 mm) is designed for drilling very deep holes or reaching recessed areas where standard bits can’t reach, while maintaining controlled rigidity for accurate drilling.
• Premium HSS material handles a wide range of workpiece materials, including steel, aluminum, and stainless steel, delivering reliable performance across common machining tasks.
• Straight shank ensures compatibility with a broad selection of drills, chucks, and CNC machines, providing secure grip and consistent runout for precise hole placement.
• BS 328 compliant construction guarantees dimensional consistency and dependable quality across industrial and workshop environments.

Typical use cases span fabricating long through-holes in thick plates, deep cavity machining in automotive or aerospace applications, and any project where reach is as critical as accuracy. This drill bit is especially valuable when you’re working with long workpieces, assemblies with limited access, or fixtures that demand a single, reliable tool for multiple materials.

Practical tips to maximize performance: align with a center punch to prevent wandering, apply light lubrication to reduce heat, and adopt a steady, moderate feed rate to avoid deflection in the long cantilever. When re-sharpening, follow established grinding guidelines to preserve the 118-degree point geometry. For best results, pair with appropriate machine speeds and coolants according to the material being drilled, and withdraw periodically to clear chips and maintain a clean cutting edge.

With the Dormer Pramet A125, you gain a versatile, long-reach solution that covers a broad spectrum of drilling needs—from everyday metalworking to specialized deep-hole tasks—without sacrificing precision or reliability.