ITC Carbide End Mill Square Edge 4121 - 4 Flute 30° Helix With Facet Relief & Diamond Coating - Composites - 20mm

The ITC Carbide End Mill Square Edge 4121 is a precision carbide milling tool designed for composite materials. With a square edge and 4-flute geometry, it delivers accurate, stable cuts and minimizes fiber pull-out in carbon fiber reinforced plastics (CFRP), fiberglass-reinforced polymers (GFRP), and similar composites.

A 30° helix, facet relief, and a diamond coating work together to improve chip control, heat resistance, and tool life, making this end mill a dependable choice for professional shops and demanding projects. The 20 mm diameter suits common pocketing, slotting, and features in modern composite parts.

• Diamond coating for extended tool life: Exceptional wear resistance that lasts through abrasive composite materials, reducing tool changes and downtime while maintaining sharp cutting edges.
• 30° helix with facet relief for smoother cutting: Optimizes chip evacuation and cutting stability, producing cleaner surfaces and consistent results across multiple passes.
• Square edge, 4-flute design for precision: Combines rigidity and efficient material removal to minimize delamination and deliver reliable, repeatable finishes on composites.

Whether you’re producing high-precision parts or running ongoing fabrication work, this end mill helps you achieve faster material removal, longer tool life, and repeatable, high-quality finishes in CFRP, GFRP, and other composite materials.