Dormer Pramet C273 12.0mm HSS-E-Powder Metal Flatted Shank Multi-Flute Long Series End Mill DIN 844 L

The Dormer Pramet C273 12.0 mm HSS-E-Powder Metallurgial End Mill is a robust long-series tool designed for shoulder and slot milling in free-machining and plain carbon steels, as well as copper and copper alloys.

• Diameter: 12.0 mm
• Length of cut: 53 mm for extended reach in deep pockets
• Overall length: 110 mm with neck relief to reduce rubbing and heat buildup
• Reach / neck relief: 64.5 mm, enabling access to deeper features without sacrificing rigidity
• Shank: Weldon, 12 mm, flatted for secure clamping
• Material: HSS-E powder-metallurgical with a bright finish for improved wear resistance
• Flutes: 4-flute design for balanced material removal and finish
• Helix angle: 30° to promote efficient chip evacuation and stable cutting
• Rake angle: 12° to optimize cutting action on shoulders and slots
• DIN standard: DIN 844 L compliance for interchangeability and compatibility
• Applications: Shoulder milling and slot milling in free-machining steels and copper alloys

This end mill combines the strength of powder-metallurgical HSS-E with a long-reach geometry, making it a reliable choice for precision milling tasks that require extended reach without sacrificing rigidity. The 30° helix supports steady chip flow, while the 12° rake angle helps manage cutting forces during shoulder and slot operations. The flatted Weldon shank ensures secure seating in standard collets or clamps, reducing tool deflection during heavy cutting. Ideal for workholding setups where deep pockets or extended shoulder passes are common, it delivers consistent finishes and predictable tool life across compatible materials.