The Dormer Pramet C159 12.0 mm HSS‑E Flatted Shank 2‑Flute Slot Drill is a precision tool designed for shoulder milling, slot milling and ramping in non‑ferrous metals. Built for reliability in demanding shops, it combines a robust cobalt‑based HSS‑E core with a flat Weldon shank for secure, consistent cutting performance.

• Diameter: 12.0 mm
• Length of cut: 26 mm
• Overall length: 83 mm
• Shank: Weldon 12 mm
• Material: HSS‑E cobalt‑based with bright finish
• Flutes: 2
• Helix angle: 40°
• Rake angle: 20°
• Standard: DIN 844 K
• Applications: slot milling, shoulder milling, ramping in non‑ferrous metals

Designed to deliver clean slots and precise shoulders, this slot drill holds tight tolerances even at higher feeds. The cobalt‑based HSS‑E construction provides improved wear resistance and cutting efficiency in aluminum, copper and other non‑ferrous alloys, helping you achieve smoother finishes and longer tool life. The 40° helix and 20° rake angle optimize chip formation and reduce built‑up edge, while the 2‑flute geometry supports efficient material removal and steadier ramping. The Weldon shank ensures secure clamping for minimal runout and repeatable accuracy across multiple jobs.