The Dormer Pramet C305 5.5 mm HSS-E Powder Metallurgical Slot Drill is a precision 3-flute cutter designed for shoulder milling, slot milling, and ramping. Built for professional workshops, it delivers dependable performance on steels and alloys with a focus on clean slots and smooth entering action.

• Diameter: 5.5 mm
• Flutes: 3-flute geometry for efficient chip evacuation and stable cutting
• Length of cut: 13 mm
• Overall length: 57 mm
• Shank: Weldon style, 6 mm
• Material: HSS-E with powder metallurgical construction and bright finish
• Helix angle: 30° for smooth entry and consistent cutting action
• Rake angle: 12° to optimize cutting on shoulders, slots, and ramps
• Standard: DIN 844 K compliant
• Applications: Shoulder milling, slot milling, and ramping in free machining and plain carbon steel, copper and copper alloys, and Fe-, Ni-, and Co-based high-temperature alloys

This slot drill is engineered to deliver precise slot dimensions and reliable tool life across a range of materials. The powder metallurgical HSS-E design enhances hardness and wear resistance, supporting longer intervals between tool changes in busy production environments. A bright finish aids coolant flow and reduces built-up edge, while the 6 mm Weldon shank ensures secure, repeatable clamping in standard tooling setups. Whether you’re reprofiling slots, creating precise shoulders, or ramping into a cut, this Dormer Pramet drill provides dependable performance and consistent results.