The Dormer Pramet C139 8.0 mm HSS-E-Powder TiCN coated slot drill is a compact, high-precision tool designed for shoulder milling, slot milling, and ramping in free-machining metals. Built for reliability in common engineering work, it delivers clean slots and consistent dimensions across a range of materials.

• Diameter: 8.0 mm
• Length of cut: 19 mm
• Overall length: 69 mm
• Shank: Weldon 10 mm
• Flutes: 2
• Material and coating: Powder-metallurgical HSS‑E with TiCN coating
• Helix: 30°
• Rake angle: 12°
• Standard: DIN 844 K
• Application: Shoulder milling, slot milling, and ramping
• Compatible workpieces: Free machining plain carbon and alloy steels, cast iron, copper or copper alloys, and titanium or titanium alloys

This tool combines the wear-resistance of TiCN coating with the toughness of powder-metallurgical HSS‑E, delivering longer tool life and stable performance in repetitive slotting and light shoulder milling. The Weldon 10 mm shank provides a robust, secure fit in standard holders, helping minimize runout and chatter. With a 30° helix and 12° rake, chip formation is efficient and cooling is improved, supporting smoother ramps and cleaner cut edges in challenging materials.