Dormer Pramet C135 5.0mm HSS-E Flatted Shank 2 Flute Standard Length Slot Drill

The Dormer Pramet C135 5.0mm HSS-E slot drill is a compact, two-flute cutter designed for precise slot milling in free-machining steels and copper alloys. Built to perform in workshop environments, it delivers dependable cutting performance with a focus on accuracy and durability.

• Diameter: 5.0 mm
• Number of flutes: 2
• Length of cut: 13 mm
• Overall length: 68 mm
• Reach with neck relief: 32 mm
• Shank type: Weldon, 6 mm
• Material / finish: HSS-E (cobalt-based) with bright finish
• Helix angle: 30°
• Rake angle: 12°
• Recommended materials: slot milling in free-machining steel and copper or copper alloys

Designed to deliver clean, accurate slots, the 2-flute geometry promotes efficient chip evacuation and stable cutting in shallow to moderate-depth slots. The cobalt-based HSS-E construction enhances wear resistance and tool life when working with tougher materials, while the 30° helix supports smooth cutting action and good surface finish. The 12° rake angle aids efficient material removal and reduces cutting forces, helping to maintain dimensional accuracy in precise slot milling tasks. A secure 6 mm Weldon shank ensures reliable drive in collet chucks and holders, making this drill a dependable choice for repetitive slotting work. The combination of reach (32 mm neck relief) and the 13 mm cut length enables access to features that are slightly recessed without compromising rigidity.