The Dormer Pramet C9220 20 mm end mill is a long-series, 4-flute tool built for shoulder and slot milling in a wide range of metals. With a durable HSS-E substrate and Alcrona Primax coating, it delivers reliable performance in deep pockets and demanding milling tasks.

• Diameter: 20 mm
• Flute count: 4-flute design for efficient cutting and chip evacuation
• Length of cut: 75 mm
• Overall length: 141 mm
• Reach with neck relief: 90.5 mm
• Shank: Weldon 20 mm with flat shank for secure clamping
• Material: Powder-metallurgical HSS-E substrate
• Coating: Alcrona Primax for wear resistance and extended tool life
• Helix angle: 45°
• Rake angle: 12°
• DIN standard: DIN 844 L
• Applications: Shoulder milling and slot milling
• Material compatibility: Plain carbon steel, alloy steel, tool steel, stainless steel, cast iron, copper and copper alloys, and high-temperature alloys

This end mill is engineered to handle deep-pocket milling and precise shoulder contours with minimal tool deflection. The long reach and neck relief reduce rubbing in deep cavities, while the 4-flute geometry promotes steady progress and smooth finishes across a variety of metals. The Weldon flat shank ensures a secure grip in collets or end-mill holders, supporting accurate, repeatable milling cycles. Whether you’re refurbishing tool steel components or shaping high-temperature alloys, this end mill provides dependable performance and consistent results.