The Dormer Pramet C353 18.0 mm HSS-E-Powder Metallurgical slot drill with a Weldon shank is a compact, extra-short three-flute tool built for precise slot and shoulder milling in steel and alloy workpieces. Its rugged construction and Alcrona Primax coating deliver reliable performance in tight pockets and demanding applications.

• Diameter: 18.0 mm
• Number of flutes: 3
• Length of cut: 19 mm
• Overall length: 79 mm
• Reach with neck relief: 30.5 mm
• Shank: Weldon, 16 mm
• Material and coating: Powder-metallurgical HSS-E with Alcrona Primax coating
• Helix angle: 30°
• Rake angle: 12°
• DIN standard: DIN 327 D
• Primary applications: slot milling, shoulder milling, and ramping
• Materials suited: steel, cast steel, cast iron, copper alloys, titanium alloys

The tool’s extra-short geometry minimizes overhang and deflection, enabling stable cuts in tight slots and shoulders while delivering a clean, precise finish. The 3-flute arrangement strikes a practical balance between chip evacuation and rigidity, making it well-suited for everyday milling in a range of common metals. Alcrona Primax coating further enhances wear resistance and reduces built-up edge, helping the insert last longer under heavy usage. The Weldon shank provides secure clamping for repeatable accuracy in high-speed machining, and the combination of 30° helix with a 12° rake angle supports efficient chip formation and smooth ramping into pockets across materials including titanium and copper alloys.