Dormer Pramet A940 3.40 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

The Dormer Pramet A940 3.40 mm HSS-E High Performance Multi-Application Straight Shank Long Series Drill is built for precision, versatility, and reliable metalworking results. Designed for demanding drilling tasks, this drill handles a wide range of materials with consistent, clean holes from start to finish.

• 130° point for self-centering – minimizes wandering and reduces the push force required to start a hole, delivering accurate starts even on hard or irregular workpieces.
• Bright finish – prevents workpiece material from sticking to the cutting edge, promoting smoother cuts and easier chip evacuation during longer runs.
• Parabolic flute design – engineered to evacuate chips efficiently, enabling deeper holes in a single pass without clogging or excessive heat buildup.
• Premium HSS-E material – offers superior strength and heat resistance, making it suitable for drilling steel, aluminum, and stainless steel with reliable hole quality.
• Long-series, straight-shank – designed for high-speed, high-feed drilling in DIN/ANSI environments, with consistent runout and compatibility with standard drill chucks.
• High-performance, high-tolerance drilling – capable of producing high-quality holes at elevated speeds and feeds, achieving H10 hole tolerance for precision assemblies.

Use cases and scenarios:

• Fabricating metal housings, brackets, and enclosures where precise, clean holes are critical for fasteners and fitment.
• Medium-thickness steel, aluminum, and stainless applications where reliability and depth of hole matter more than single-pass speed.
• Projects that demand repeatable hole quality across multiple workpieces, reducing rework and downtime.

Why this drill stands out: unlike standard high-speed steels, the HSS-E composition combines outstanding toughness with heat resistance, enabling more durable performance under demanding milling and drilling cycles. The combination of a precise 130° point and a parabolic flute geometry translates to quicker starts, fewer center-mark adjustments, and deeper hole capability without sacrificing edge life. For operators seeking consistent, accurate results across a variety of materials, this drill delivers a practical, long-term solution.

Practical tips for best results:

• Securely clamp your workpiece and use a center punch to guide the drill for an exact start.
• Choose appropriate spindle speed and feed rate for the material: higher speeds with aluminum, controlled feeds for steel and stainless steel to minimize heat buildup.
• Apply a suitable cutting fluid or lubricant to extend tool life and improve surface finish, especially on harder materials.
• Start with a shallow pilot hole if drilling deep into a tough workpiece to maintain alignment and reduce insert wear.

Diameter: 3.40 mm • Material: HSS-E • Angle: 130° point • Designation: Long Series, Straight Shank • Standards: DIN/ANSI compatible • Tolerance: capable of achieving H10 hole tolerance