The Dormer Pramet C139 8.5 mm slot drill is a precise, two-flute HSS‑E tool with TiCN coating, designed for reliable slot milling, shoulder milling, and ramping in free‑machining steels and related materials. Compatible with DIN 844 K holders and featuring a robust 10 mm Weldon shank with a flatted section for secure clamping, it suits high-precision machining in busy workshops.

• Diameter: 8.5 mm
• Length of cut: 19 mm
• Overall length: 69 mm
• Shank: Weldon, 10 mm (flatted for secure seating)
• Material and coating: HSS‑E, powder metallurgical, TiCN coating
• Flutes: 2
• Standard: DIN 844 K
• Geometry: 30° helix, 12° rake angle
• Applications: shoulder milling, slot milling, and ramping
• Material compatibility: free‑machining steel, plain carbon and alloy steel, cast iron, copper or copper alloys, and titanium or titanium alloys

Designed for clean, repeatable slots and efficient material removal, this tool pairs the wear‑resistant TiCN coating with a powder‑metallurgical HSS‑E substrate to deliver longer tool life in demanding machining work. Its short series design adds rigidity for precise slotting, while the two‑flute geometry balances chip evacuation with a strong cutting action, making it a dependable choice for everyday production and precision projects alike.