5/16" Cobalt Roughing End Mill – HSS-Co Serrated Milling Cutter

The 5/16" Cobalt Roughing End Mill is designed for fast, aggressive material removal in tough metals such as stainless steel, alloy steel, and hardened materials. Made from cobalt high-speed steel (HSS-Co), it delivers superior heat resistance, long-lasting durability, and reliable performance in heavy-duty milling operations.

Serrated roughing flutes reduce cutting forces, enhance chip evacuation, and minimize chatter, allowing higher feed rates than standard end mills. Ideal for CNC and manual milling machines, this end mill ensures efficient roughing passes and prepares parts for finishing operations with consistent precision.

Features & Benefits
  • 5/16" diameter cobalt roughing end mill
  • Cobalt HSS construction for heat resistance and durability
  • Serrated flutes for aggressive material removal
  • Reduced chatter and improved chip evacuation
  • Suitable for stainless steel and tough alloys
  • Allows higher feed rates than standard end mills
  • Ideal for CNC and manual milling machines

Built for professional machining, this cobalt roughing end mill delivers dependable strength, efficiency, and precision for demanding metal cutting applications.

In-stock items usually ship within 2 business days but can take up to 7 business days. Shipping time starts once your order heads out the door.