Cleveland C39575 Square End Mill 0.125 in 3 Flute Hss

Product Description

The CLEVELAND C39575 is a double-end, three-flute square end mill manufactured from high speed steel (HSS). It carries a 0.125-inch cutting diameter with a 0.375-inch length of cut (LOC) and a 0.375-inch straight cylindrical shank with a Weldon flat. The overall length is 3.0625 inches. A right-hand cut and right-hand spiral flute geometry at a 30-degree helix angle promote efficient chip evacuation across a range of workpiece materials. The centercutting design allows plunge entry, adding versatility for slotting and pocket milling operations. Licensed machinists and tool-and-die professionals are the primary users of this end mill.

The C39575 is suited for milling operations on cast iron, non-ferrous metals, and steel. Its regular-length classification and double-end configuration make it a practical choice for job shops and production environments where tool economy matters. The HD-3 series designation indicates a heavy-duty, general-purpose geometry appropriate for conventional milling setups on manual mills and CNC machining centers running typical HSS-compatible feeds and speeds.

Key Features

• Double-end design provides two usable cutting ends per tool
• Centercutting geometry allows direct plunge entry into the workpiece
• 30-degree helix angle on spiral flutes aids chip evacuation
• Three-flute configuration balances rigidity and chip clearance
• Weldon flat on shank reduces pullout risk in end mill holders
• Uncoated HSS construction; compatible with standard cutting fluids and oils

Compatibility

Designed for use on conventional milling machines and CNC machining centers accepting a 0.375-inch shank diameter. Rated for primary workpiece materials including cast iron, non-ferrous metals, and steel per manufacturer material codes K, N, and P.

Installation Notes

Secure the shank in a properly sized end mill holder or collet, engaging the Weldon flat set screw to prevent axial pullout. Verify spindle runout before cutting to avoid premature edge wear. Follow machine manufacturer guidelines and applicable shop safety codes when setting feeds and speeds for HSS tooling. Inspect both cutting ends for chipping or wear before each use.