Cleveland Golf Cobalt End Mill 5/8 4FL Double Square 30 Deg

Cobalt End Mill for General Machining

This cobalt end mill is built for standard milling tasks in a workshop or maintenance setting. Its 4-flute, double-ended design with a square profile suits plunge cutting, peripheral milling, deep slotting and pocketing. The bright-finished cobalt steel construction supports higher feeds and speeds than high-speed steel alternatives. It is a practical choice for machinists and fabricators working on general-purpose metal removal.

Double-Ended Tool for Milling Setups

The tool features a 5/8 inch diameter with a matching 5/8 inch shank for direct fit in compatible holders or collets. Each end provides a 1 3/8 inch length of cut within an overall length of 5 inches, giving two usable cutting sections from a single tool. The 30-degree helix geometry on both right-hand and left-hand helix angles promotes chip evacuation and stability during cutting passes. Center-cutting capability allows the tool to start its own plunge without a pre-drilled hole.

Upgrade from Single-End High-Speed Steel

This double-ended cobalt tool replaces single-ended high-speed steel end mills when longer tool life and faster material removal are needed. The cobalt substrate resists heat and wear better, making the jump worthwhile for production runs or tougher alloys where frequent tool changes slow the job. It is not suited for applications requiring specialised coatings, variable helix designs or carbide rigidity for high-precision finishing passes.