The Dormer Pramet C306 15.0mm slot drill is a compact, high-precision HSS-E tool designed for slotting, shoulder milling, and ramping in free-machining steels and copper alloys. Built for reliability in tight slots, it combines a flat Weldon shank with Primax powder-metallurgy steel for durable, consistent performance.

• Diameter: 15.0 mm
• Length of cut: 16 mm
• Overall length: 73 mm
• Reach with neck relief: 27.5 mm
• Shank: Weldon, 12 mm
• Material and finish: HSS-E powder metallurgy (Primax) with bright finish
• Flutes: 3
• Helix and rake: 30° helix, 12° rake angle
• Standard: DIN 327 D
• Applications: Slot milling, shoulder milling, and ramping in free-machining plain carbon steel and copper/copper alloys

Designed to minimize deflection in small-diameter work, this drill delivers clean slots and precise shoulders with a positive tool drive from its 12 mm Weldon shank. The 30° helix aids efficient chip evacuation and a smooth finish, while the 12° rake angle helps control cutting forces during shoulder milling and ramping. Suitable for shops handling production runs in free-machining steels or copper alloys, it offers dependable performance where accuracy and repeatability matter most.