A purpose-built 22 mm slot drill from Dormer Pramet, the C139 HSS-E TiCN-coated tool is designed for reliable slotting, shoulder milling, and ramping in a range of steels and non-ferrous alloys. Built for precision and consistency, it suits workshops and fabrication shops that require steady performance in deep slots and pockets.

• Diameter: 22.0 mm
• Length of Cut: 38 mm
• Overall Length: 104 mm
• Reach / Neck Relief: 53.5 mm
• Shank: 20 mm Weldon shank
• Material: HSS-E (powder metallurgy)
• Coating: TiCN for increased wear resistance
• Flutes: 2
• Helix Angle: 30°
• Rake Angle: 12°
• Standard: DIN 844 K
• Applications: Slot milling, shoulder milling, and ramping
• Materials Compatible: Free-machining steel, plain carbon and alloy steel, cast iron, copper and copper alloys, titanium and titanium alloys

Designed for efficient material removal with controlled chip evacuation, the tool leverages a 30° helix and 12° rake to balance cutting action and surface finish. The powder-metallurgical HSS-E core provides toughness and wear resistance, while the TiCN coating extends tool life in demanding milling and slotting tasks. The 20 mm Weldon shank ensures a secure, repeatable fit in standard holders, and the extended reach with neck relief enables deeper slots and shoulder features without interference. This combination makes the Dormer Pramet C139 slot drill a dependable choice for precision slots, pockets, and ramping across a variety of common machining materials.