The Dormer Pramet C159 20.0 mm slot drill is a robust two-flute tool designed for slot milling, shoulder milling, and ramping in non-ferrous metals. Built with a cobalt-based HSS-E body and a precise Weldon shank, it delivers dependable performance in standard-length operations.

• Diameter: 20.0 mm
• Flutes: 2
• Length of Cut (LOC): 38 mm
• Overall Length: 104 mm
• Reach with Neck Relief: 53.5 mm
• Shank: Weldon 20 mm
• Material: HSS-E cobalt-based with bright finish
• Helix Angle: 40°
• Rake Angle: 20°
• Standard: DIN 844 K
• Applications: Slot milling, shoulder milling, and ramping in non-ferrous metals

Designed for precise, repeatable cuts, this 2-flute slot drill excels at removing material smoothly in non-ferrous materials such as aluminum, copper, and brass. The cobalt-based HSS-E composition offers improved hot hardness and wear resistance for longer tool life in demanding milling tasks, while the bright finish helps with chip flow and visibility. The 40° helix supports efficient chip evacuation, and the 20° rake angle enhances cutting action on shoulders and slots. With a 20 mm Weldon shank, it locks securely into compatible holders for stable performance and repeatable results.