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Cobalt end mill 5/8 inch double square 30 degree helix

Cleveland Golf

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

SKU CH-BKBC-XKSK4

A 5/8-inch cobalt end mill with four flutes and double square ends for plunge cutting, peripheral milling and deep slotting

  • TypeHole, Drill, Bore & Wire Gauges
  • Cobalt steel resists heat for longer tool life
  • Four flutes remove chips efficiently at higher feeds
  • Double-end design provides two cutting ends per tool
  • Square-end geometry creates flat-bottom slots and pockets
  • Center-cutting capability allows direct plunge cuts into material

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.

Highlights

  • Cobalt steel resists heat for longer tool life
  • Four flutes remove chips efficiently at higher feeds
  • Double-end design provides two cutting ends per tool
  • Square-end geometry creates flat-bottom slots and pockets
  • Center-cutting capability allows direct plunge cuts into material

Specifications

BrandCleveland
TypeHole, Drill, Bore & Wire Gauges

Questions about this item

How does the 30-degree helix angle affect chip evacuation during deep slotting?

The 30-degree helix angle balances chip evacuation and edge strength for general-purpose plunge cutting and peripheral milling in cobalt steel.

What heat buildup should I expect when running this cobalt end mill at higher feeds all day?

Cobalt steel retains hardness at elevated temperatures, allowing sustained higher feeds and speeds in plunge cutting and pocketing without rapid edge degradation.

What tool holder do I need for the 5/8-inch shank on this double-end mill?

A 5/8-inch shank requires a matching 5/8-inch collet, end-mill holder, or shrink-fit holder for secure clamping in the machine spindle.

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