Engineered for precision slotting, shoulder milling, and ramping, the Dormer Pramet C353 4.0 mm slot drill delivers reliable cutting in steel and alloy workpieces. Its extra-short, short-series geometry and Alcrona Primax coating provide rigidity and long tool life in tight slots.

• Diameter: 4.0 mm
• Flutes: 3
• Length of cut (LOC): 7 mm
• Overall length: 51 mm
• Shank: Weldon/flat shank, 6 mm
• Material: HSS-E powder metallurgy
• Coating: Alcrona Primax
• Helix angle: 30°
• Rake angle: 12° (for shoulder milling)
• Standard: DIN 327 D
• Series: Extra-short/Short series slot drill
• Applications: Slot milling, shoulder milling, and ramping in steel, cast steel, cast-iron, copper/copper alloys, and titanium/alloys

The tool’s powder-metallurgical HSS-E core combined with the Alcrona Primax coating minimizes wear and friction, extending tool life in demanding materials. The compact short geometry increases rigidity in shallow slots, helping to achieve cleaner finishes with fewer passes. A robust 6 mm Weldon/flat shank ensures secure seating in standard holders, contributing to precise tool alignment and consistent hole dimensions. With DIN 327 D compatibility, this drill integrates smoothly into existing tooling setups, making it a dependable choice for precision slotting and shoulder milling workflows in both workshop and production environments.