The Dormer Pramet C305 10.0 mm slot drill is a precision, three-flute cutting tool designed for slot milling, shoulder milling, and ramping in a variety of steels and alloys. Built on powder-metallurgical HSS-E with a bright finish, this Primax-grade drill delivers dependable performance in demanding machining environments.

• Diameter: 10.0 mm
• Number of flutes: 3
• Length of cut: 22 mm
• Overall length: 72 mm
• Reach with neck relief: 31.5 mm
• Shank: Weldon 10 mm
• Standard: DIN 844 K
• Material & finish: Powder metallurgical HSS-E with bright finish
• Geometry: 30° helix and 12° rake for efficient cutting in slot, shoulder milling, and ramping
• Applications: Suitable for free-machining and plain carbon steel, copper and copper alloys, and Fe-, Ni-, Co-based high-temperature alloys

The C305 is optimized to deliver clean slots with reliable diameter control, even in challenging materials. Its powder-metallurgical HSS-E core extends wear resistance and edge retention, helping you maintain consistent performance across long runs. The 30° helix reduces cutting forces and promotes smooth chip evacuation, while the 12° rake angle enhances engagement in shoulder and ramping operations. With a Weldon 10 mm shank and DIN 844 K compatibility, it integrates smoothly into common milling setups, minimizing setup time and downtime. Use it for precise slotting, pocketing, or forming shallow pockets in a range of steel and alloy workpieces, from free-machining steels to copper alloys and high-temperature alloys.