Meet the Dormer Pramet C353 4.5 mm HSS‑E powder metallurgical slot drill—a compact, three‑flute tool designed for precise shoulder milling, slotting, and ramping in steel, cast iron, copper alloys, and titanium. Built for engineers and machinists who work in tight pockets, it delivers reliable performance with a focused, no‑nonsense design.

• Diameter: 4.5 mm
• Flutes: 3
• Length of cut: 7 mm
• Overall length: 51 mm
• Shank: Flatted 6 mm Weldon shank for secure clamping
• Material & coating: HSS‑E powder metallurgical substrate with Alcrona Primax coating
• Helix: 30° for efficient chip evacuation
• Rake angle: 12° for improved cutting action in shoulder and slot milling
• Standards: DIN 327 D compatible
• Application: Shoulder milling, slot milling, and ramping in a range of metals
• Materials suited: Steel, cast steel, cast iron, copper and copper alloys, titanium and titanium alloys

The C353 combines a durable HSS‑E substrate with the wear‑resistant Alcrona Primax coating to extend tool life and maintain sharpness under demanding milling conditions. The extra‑short form and 3‑flute geometry provide stiffness and stability when cutting in confined pockets, helping to produce clean shoulders and accurate slots with fewer finishing passes. A flatted 6 mm Weldon shank ensures a secure grip in standard milling holders, reducing runout and chatter during high‑precision operations. Whether you’re slot milling intricate pockets, shoulder milling shoulders, or ramping into a workpiece, this drill offers dependable performance across a broad material range.