Precision micro-slot drilling with durable performance. The Dormer Pramet C305 2.5 mm HSS-E powder metallurgical slot drill is designed for small-slot and shoulder milling tasks, delivering consistent results in free-machining carbon steels, copper alloys, and a range of Fe-, Ni-, and Co-based high-temperature alloys.

• Diameter: 2.5 mm
• Flutes: 3-flute geometry for efficient cutting and reliable chip evacuation
• Length of cut: 8 mm
• Overall length: 52 mm
• Shank: Weldon shank, 6 mm diameter
• Material: HSS-E with powder-metallurgy production and a bright finish
• Helix angle: 30° for smooth cutting and effective chip flow
• Rake angle: 12° to enhance cutting action in shoulder milling and ramping
• Standard: DIN 844 K compatible
• Brand/Series: Dormer Pramet Primax
• Applications: Shoulder milling, slot milling, and ramping
• Material compatibility: Suitable for free machining and plain carbon steel, copper/copper alloys, and Fe-, Ni-, and Co-based high-temperature alloys

This tool combines a compact 2.5 mm diameter with a robust 3-flute design and a durable powder-metallurgy HSS-E composition. The result is reliable performance in tight slots and precision features, with a bright finish that helps reduce built-up edge and makes secondary finishing easier. The Weldon 6 mm shank provides secure clamping for steady, accurate milling, while the DIN 844 K specification ensures broad compatibility with standard holders. Ideal for tight tolerance work in small electronics housings, automotive components, and precision-machined parts across a variety of steels and alloys.