The Dormer Pramet C135 3.0 mm HSS-E slot drill is a compact, high-precision cutting tool designed for slot milling in free‑machining steel and copper alloys. Built for reliability in busy workshops, it delivers clean, accurate slots with consistent performance.

• Diameter: 3.0 mm
• Length of cut: 8 mm
• Overall length: 56 mm
• Reach / neck relief: 20 mm reach with neck relief
• Shank: 6 mm Weldon shank with flat/neck relief
• Material: Cobalt-based HSS‑E with bright finish
• Helix angle: 30°
• Rake angle: 12°
• Flutes: 2
• Standard: Dormer standard (DORMER standard)
• Applications: Slot milling in free‑machining steel and copper or copper alloys

Designed for dependable performance in slotting tasks, this 2‑flute drill maintains rigidity and chip control at small diameters. The cobalt‑based HSS‑E construction enhances wear resistance and heat tolerance, helping to extend tool life during repetitive slotting. The bright finish aids visibility of chips and edges, while the Weldon shank ensures a secure, repeatable grip in standard collets or chucks. The 30° helix and 12° rake are optimized for efficient material shearing and smooth chip flow in tough materials, making it a reliable choice for precision slot work.