The Dormer Pramet C353 20.0 mm HSS-E-Powder Metallurgy slot drill is an extra-short, 3-flute tool designed for precise slotting, shoulder milling, and ramping in a range of metals. Built for reliable performance in demanding applications, it delivers clean slots with consistent accuracy.

• Diameter: 20.0 mm
• Length of cut: 22 mm
• Overall length: 88 mm
• Reach / neck relief: 37.5 mm
• Shank type: Weldon, 20 mm
• Flutes: 3
• Material: HSS-E powder metallurgical (high-speed steel, enhanced toughness and wear resistance)
• Coating: Alcrona Primax for reduced friction and extended tool life
• Helix angle: 30°
• Rake angle: 12°
• Standard: DIN 327 D
• Primary applications: Shoulder milling, slot milling, and ramping
• Compatible materials: Steel and cast steel, cast iron, copper or copper alloys, and titanium or titanium alloys

This combination of geometry and coating supports stable cutting conditions, efficient chip evacuation, and precise slot dimensions across a variety of workpiece materials. The extra-short length minimizes tool deflection in tight pockets and deep slots, while the Weldon shank ensures secure clamping in standard holders. Whether you’re producing keyways, datum slots, or ramped entry passages, the C353 slot drill is engineered to deliver consistent results with minimal setup adjustments.