Designed for precision in non-ferrous milling, the Dormer Pramet C159 18.0mm HSS‑E slot drill is a short‑series, two‑flute tool built for reliable shoulder milling, slot milling, and ramping. Its cobalt‑based HSS‑E composition and robust Weldon shank deliver consistent performance in a compact form factor.

• Diameter: 18.0 mm
• Number of Flutes: 2
• Length of Cut: 32 mm
• Overall Length: 92 mm
• Reach with Neck Relief: 43.5 mm
• Shank: 16 mm Weldon
• Material: Cobalt‑based HSS‑E
• Finish: Bright
• Helix: 40°
• Rake Angle: 20°
• Standard: DIN 844 K
• Applications: Shoulder milling, slot milling, and ramping in non‑ferrous metals

The 40° helix and 20° rake angle strike a balance between efficient material removal and smooth cutting action, helping to reduce work hardening in soft metals while maintaining good surface finish. The 2‑flute geometry promotes efficient chip clearance for slots and pockets, with the bright finish aiding chip evacuation and reducing built‑up edge. A 16 mm Weldon shank ensures secure, repeatable clamping in standard milling holders, making this drill suitable for production environments where rigidity and accuracy matter. The DIN 844 K specification guarantees compatibility with common tool holders and industry practices.