Dormer Pramet A110 5/16 Inch HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

Engineered for precision and depth, the Dormer Pramet A110 5/16 Inch HSS ST Straight Shank Long Series Drill (DIN 340) delivers reliable performance when you need to reach deeper into thick materials without compromising hole quality. This is a true workhorse for demanding metalworking tasks, built to withstand daily use in workshops, fabrication shops, and production environments.

118-degree conventional point for clean starts

The drill features an 118-degree point that bites firmly into the workpiece, delivering a strong start and reducing wandering during entry. This geometry also makes it easier to re-grind, so you can refresh the edge quickly and extend the tool’s life between replacements.

Steam oxide finish to minimize sticking

The steam oxide coating reduces friction between the cutting edge and the material being drilled. By minimizing built-up edge, it helps maintain consistent hole size and smoother chip flow, especially when drilling metals that tend to seize or smear during cutting.

Long length series for increased reach

Designed as a long-length drill, it excels at drilling deeper holes and reaching recessed areas where a standard drill would fall short. The extended reach also aids in maintaining rigidity and steady chip evacuation, reducing the need for multiple tools on challenging workpieces.

Premium HSS for versatile material compatibility

Made from high-speed steel, this drill handles a broad range of materials—steel, aluminum, and stainless steel—with dependable performance. Its toughness supports repeated use in varied applications, from fabrication to maintenance tasks, while still offering the can-do practicality you expect from DIN 340 tooling.

Versatility for handheld and machine setups

With a straight shank, this drill fits a wide array of chucks and collets, making it a flexible choice for both handheld drills and machine-driven setups. Whether you’re working on a manual drill press, a portable drill, or a CNC-adjacent workflow, you’ll appreciate the tool’s straightforward compatibility and stable performance.

Real-world use cases and advantages

• Deep-hole drilling in thick metal plates or structural components where shorter drills can’t reach.
• Prototyping and fabrication tasks that require consistent hole depth and diameter across multiple parts.
• Maintenance and repair jobs in automotive or industrial settings where quick, reliable threading and fast hole creation are essential.
• Everyday workshop tasks where minimizing tool changes saves time and keeps projects moving.

Key specifications at a glance: 5/16" diameter, HSS material, straight shank, long series length, DIN 340 compliance, 118-degree point, steam oxide finish.

Keep the edge sharp with regular inspection and gentle re-grinding to maintain optimal performance. Pair with proper feed rates and gentle lubrication to maximize tool life and hole quality across materials and thicknesses.