Dormer Pramet C407 18.0mm HSS-E-Powder Metal Primax Flatted Shank Multi-Flute Roughing (NRA) Standard Length End Mill DIN 844 K

The Dormer Pramet C407 18.0 mm HSS-E Powder Metallurgical Primax roughing end mill is engineered for high-efficiency material removal in steel and alloy workpieces. Designed for shop floors and CNC operators who need reliable roughing performance, it combines toughness with precise geometry to handle demanding milling tasks.

• Diameter: 18.0 mm
• Flutes: 4
• Profile: NRA asymmetrical coarse pitch
• Length of cut: 32 mm
• Overall length: 92 mm
• Reach with neck relief: 43.5 mm
• Shank: Weldon, 16 mm (flatted)
• Material: HSS-E powder metallurgical with bright finish
• Helix angle: 35°
• Rake angle: 12°
• DIN standard: 844 K
• Applications: Shoulder milling, slot milling, and ramping
• Compatibility: Suitable for steel, cast steel, ferritic, martensitic and super‑austenitic stainless steels, duplex or precipitation hardening stainless steels, cast iron, copper and copper alloys, and high‑temperature alloys

The 18 mm end mill’s four-flute geometry provides a balanced combination of aggressive material removal and stable chip control, making it well-suited for roughing passes in complex components. The NRA asymmetrical coarse pitch reduces chatter tendencies at high feed rates, while the 35° helix and 12° rake angle optimize cutting action for shoulder, slot, and ramp milling. Powder metallurgical HSS‑E offers improved toughness and wear resistance, supporting longer tool life in challenging alloys. The 16 mm Weldon shank with a flat seating surface ensures a secure, repeatable clamping interface in standard toolholders, and the DIN 844 K specification guarantees broad compatibility with existing setups. This Primax end mill is a practical choice for shops seeking dependable performance in a wide range of ferrous and nonferrous materials, delivering efficient roughing with predictable results.