The Dormer Pramet C305 17.0 mm HSS-E Powder Metal Primax slot drill is built for precision slotting, shoulder milling, and ramping in free-machining steels and demanding alloys. Designed for workshop pros and precision-focused shops, it combines robust metallurgy with thoughtful geometry for reliable, repeatable results.

• Diameter: 17.0 mm
• Flutes: 3-flute configuration for efficient material removal and chip evacuation
• Length of cut: 32 mm, optimized for slot milling and pocketing
• Overall length: 92 mm for extended reach in deep slots
• Reach with neck relief: 43.5 mm, enabling deeper operations with reduced neck stress
• Shank: Weldon, 16 mm for secure clamping and repeatable seating
• Material: HSS-E with powder metallurgy construction for enhanced wear resistance
• Finish: Bright finish for smooth cutting and reduced built-up edge
• Helix angle: 30°, promoting efficient cutting and good chip flow
• Rake angle: 12°, designed to improve cutting action on a range of materials
• DIN standard: DIN 844 K specification for compatibility with compatible holders and tooling systems
• Applications: Shoulder milling, slot milling, and ramping in free-machining and carbon steels, copper and copper alloys, as well as Fe-, Ni-, and Co-based high-temperature alloys

This tool blends the stability of a three-flute geometry with a long, rigid Primax design, making it well-suited for shops that routinely create slots, shoulders, or entry ramps in a variety of materials. The powder-metallurgical HSS-E composition delivers durable cutting edges and extended tool life, while the neck relief reduces interference during deep-slot operations. The Weldon shank and bright finish ensure reliable clamping and clean surface finishes in every pass, helping you achieve accurate slot widths and consistent pocket depths with minimal rework.