The Dormer Pramet C305 22.0mm HSS-E-Powder Metall Primax slot drill is a compact, three-flute tool designed for precise slot and shoulder milling as well as ramping in a wide range of steels and alloys. Built to DIN 844 K specifications with a flatted shank, it delivers dependable performance in everyday machining tasks.

• Diameter: 22.0 mm
• Flutes: 3
• Length of cut: 38 mm
• Overall length: 104 mm
• Reach (neck relief): 53.5 mm
• Shank: 20 mm Weldon shank with flatted section
• Material: HSS-E powder metallurgy for enhanced wear resistance and hot hardness
• Finish: Bright finish for smooth chip flow and reduced build-up
• Helix angle: 30° enabling efficient chip evacuation and stable cutting
• Rake angle: 12° for improved cutting action in shoulder milling and slotting
• Designation: Short series slot drill
• Standards: DIN 844 K compatible
• Applications: Shoulder milling, slot milling, and ramping
• Compatible materials: Free machining and plain carbon steel, copper and copper alloys; Fe-, Ni-, and Co-based high-temperature alloys
• Brand lineage: Dormer Pramet Primax line

This tool is built to tackle practical machining scenarios with confidence: clean slot slots in metal beds, accurate shoulder features for fittings, and controlled ramping in challenging alloys. The three-flute geometry provides a balanced combination of material removal and surface finish, while the powder-metallurgical HSS-E core offers improved wear resistance for longer tool life under typical shop conditions. The flatted shank ensures a secure grip in compatible holders, supporting precise orientation and repeatable results across successive passes. Whether you’re working in free-machining steel, copper alloys, or tougher high-temperature alloys, this slot drill is engineered to deliver consistent performance, reliable dimensions, and efficient cutting action.