The Dormer Pramet C353 8.5 mm HSS-E powder-metallurgically enhanced slot drill is built for precise shoulder and slot milling in a range of metals. Designed for professionals who work in constrained pockets, it combines durability, accuracy, and efficient chip control in a compact form.

• Diameter: 8.5 mm
• Flutes: 3-flute configuration for stable cutting and efficient chip evacuation
• Length of cut: 11 mm
• Overall length: 61 mm
• Shank: Flatted Weldon shank, 10 mm
• Shank standard: DIN 327 D
• Material and coating: HSS-E with powder-metallurgical structure and Alcrona Primax coating
• Helix and rake: 30° helix, 12° rake angle for controlled cutting and smooth entry
• Applications: Shoulder milling, slot milling and ramping in steel, cast steel, cast iron, copper alloys and titanium alloys

This tool is designed to deliver clean slots with consistent dimensions in tight spaces. The combination of a short tool body and a flatted shank reduces deflection and improves seating rigidity, helping to minimize chatter and extend insert and tool life. Alcrona Primax coating enhances wear resistance under high-speed machining, making it suitable for demanding metals like titanium and copper alloys, while the 3-flute geometry supports effective material removal in slotting operations. Whether you’re machining narrow shoulders, precise slots, or ramping into a workpiece, this drill offers reliable performance and repeatable results.