Cleveland C40020 Corner Radius End Mill 3/4 in 3 Flute Ticn

Product Description

The CLEVELAND C40020 is a corner radius end mill engineered for metal removal in milling operations requiring a radiused cutting edge. Designed in the PM-538R series, it features a 3/4-inch cutting diameter, 3-inch length of cut (LOC), and a 5-1/4-inch overall length (OAL). The tool carries a TiCN (Titanium Carbonitride) coating, which improves wear resistance and surface hardness compared to uncoated carbide. Three spiral flutes with a coarse pitch and 42-degree helix angle promote chip evacuation and reduce cutting forces. The centercutting geometry allows plunge entry into the workpiece. This end mill is installed and operated by machinists and tool-and-die professionals on CNC machining centers and manual knee mills.

This end mill is suited for milling ferrous and non-ferrous metals where a corner radius is required to reduce stress concentrations or meet part geometry tolerances. The 42-degree helix and right-hand spiral flute configuration make it appropriate for climb and conventional milling of steel, stainless steel, cast iron, and similar materials. The 3/4-inch shank diameter fits standard ER collet chucks, end mill holders, and side-lock holders in that bore size. The 3-inch LOC allows for deep-pocket and shoulder milling applications without excessive tool extension.

Key Features

• TiCN coating increases surface hardness and extends tool life in ferrous materials
• 42-degree helix angle promotes aggressive chip evacuation and smooth cutting action
• Centercutting design allows direct plunge entry into the workpiece
• Coarse pitch, 3-flute configuration balances chip clearance with cutting stability
• Right-hand cut and right-hand spiral for standard CNC spindle compatibility
• PM-538R series designation indicates a high-performance powdered-metal substrate

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for CNC machining centers and manual milling machines accepting a 3/4-inch shank diameter end mill holder or collet.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank to the recommended minimum engagement depth in the holder per the machine tool manufacturer's guidelines. Verify runout with a dial indicator after installation before beginning a cut.