The Dormer Pramet C305 slot drill is a precision 16 mm, three-flute HSS‑E (powder metallurgy) tool designed for reliable slot milling, shoulder milling, and ramping in a range of steels and alloys. With a Weldon 16 mm shank and a bright finish, it combines durability with secure, repeatable performance in demanding applications.

• Diameter: 16 mm
• Flutes: 3-flute design for efficient chip evacuation and stable cutting
• Length of cut: 32 mm, optimized for shallow to mid-depth slots
• Overall length: 92 mm for versatile reach
• Neck relief reach: 43.5 mm to access deeper features with reduced rubbing
• Shank: Weldon 16 mm for secure clamping and accurate seating in holders
• Material: HSS‑E powder metallurgy with bright finish for enhanced hardness and wear resistance
• Helix angle: 30° to promote smooth cutting action and good chip control
• Rake angle: 12° for efficient shoulder milling, slot milling, and ramping
• Standard: DIN 844 K
• Applications: shoulder milling, slot milling, and ramping in free machining and various alloy families
• Compatible materials: free machining and plain carbon steel, copper and copper alloys, Fe‑based, Ni‑based, and Co‑based high‑temperature alloys

This tool delivers precise slots with consistent dimensions and clean edges, thanks to its robust powder‑metallurgy construction and carefully engineered geometry. The combination of a bright finish, a strong 30° helix, and a moderate 12° rake supports stable machining across a broad material range, while the neck relief and long reach reduce the need for frequent tool changes during pocketing or deep slots. Ideal for shops seeking dependable performance in everyday slot milling tasks and complex shoulder milling operations without compromising workpiece finish or dimensional accuracy.