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Cobalt double-end mill, TiCN finish, 5/16 inch diameter, four flutes, 3/8 inch shank

Cleveland Golf

Cleveland Golf Cobalt End Mill 5/16 4 Flute Double End TiCN

SKU CH-PXGH-MFTR9

Cobalt square end mill with TiCN finish, 5/16 inch diameter, four flutes, double-ended for finishing operations

  • TypeHole, Drill, Bore & Wire Gauges
  • Cobalt construction resists wear during finishing cuts
  • TiCN coating extends tool life in steel alloys
  • Four-flute design improves surface finish quality
  • Double-ended geometry provides two cutting ends
  • 30-degree helix angle balances chip evacuation and rigidity

Cobalt End Mill for Finishing

This Cleveland Golf end mill is a double-ended square tool made from cobalt steel with a TiCN coating. It suits machinists and fabricators who need a general-purpose cutter for finishing operations on ferrous and non-ferrous materials. The 4-flute design supports smoother surface finishes in light profiling passes.

Heat and Tool Life

Cobalt substrate and TiCN finish reduce wear and heat buildup during normal finishing cuts, helping the cutting edges stay sharp longer. Right-hand helix at 30 degrees promotes stable chip evacuation without excessive vibration. The 3/8 in. shank fits standard holders for rigid, low-runout performance.

Upgrade from Single-End HSS

Shops replacing single-end high-speed steel cutters gain twice the usable edges per tool, lowering cost per cut on repeat jobs. The step is worthwhile when finishing tolerance work demands consistent corner radii of .000 in. and longer intervals between tool changes. Builders needing roughing geometry or larger diameters should select a different tool.

Highlights

  • Cobalt construction resists wear during finishing cuts
  • TiCN coating extends tool life in steel alloys
  • Four-flute design improves surface finish quality
  • Double-ended geometry provides two cutting ends
  • 30-degree helix angle balances chip evacuation and rigidity

Specifications

BrandCleveland
TypeHole, Drill, Bore & Wire Gauges

Questions about this item

How do I install the 5/16 inch double-end cobalt mill in a 3/8 inch shank holder without damaging the TiCN coating?

Clamp only on the 3/8 inch shank using a precision collet or set-screw holder; never tighten on the 5/16 inch cutting section. Insert until the 3/4 inch length-of-cut clears the workpiece, then secure. The 30 degree helix pulls chips upward, so verify rotation is right-hand before starting.

When will the TiCN finish on the 4-flute cobalt end mill need replacement?

Replace when the TiCN coating on the 5/16 inch square ends shows visible wear or when corner radius deviates from .000 inch. Cobalt substrate resists heat, but the 30 degree helix and 3/4 inch flute length concentrate finishing forces; inspect after each job for chipping or loss of edge sharpness.

What thermal limit appears first during a long finishing pass with the 30 degree helix?

The 30 degree helix evacuates chips efficiently, yet the 3/4 inch length of cut on a 5/16 inch diameter creates a high length-to-diameter ratio. Heat builds at the TiCN-coated corners first, so the .000 inch corner radius tolerance is the earliest indicator of thermal softening.

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