Cleveland C39721 Square End Mill 1 in 3 Flute Hss Ticn

Product Description

The CLEVELAND C39721 is a single-end square end mill designed for material removal in milling applications across ferrous and non-ferrous workpieces. Built from high speed steel with a titanium carbonitride (TiCN) finish, this tool delivers improved surface hardness and wear resistance compared to uncoated HSS. The 1 inch cutting diameter and 3-flute spiral geometry provide a balance of chip clearance and cutting efficiency. The right-hand cut and right-hand flute configuration makes it compatible with standard vertical and horizontal milling machine spindles. Centercutting capability allows plunge milling in addition to peripheral cuts.

This end mill is suited for milling operations on cast iron, non-ferrous metals, and steel in job shop, maintenance, and production environments. The 3/4 inch straight-cylindrical shank with Weldon flat accommodates standard end mill holders and set-screw style toolholders. The regular-length configuration fits most knee mills, CNC machining centers, and manual mills where extended reach is not required. Machinists and tool-and-die professionals will find this tool appropriate for slotting, profiling, and pocketing operations within its specified length-of-cut range.

Key Features

• 1 inch cutting diameter with 1-7/8 inch length of cut for standard-depth milling passes
• High speed steel construction with TiCN coating for extended tool life on ferrous and non-ferrous materials
• 3-flute spiral design balances chip evacuation and feed rate capability
• Centercutting geometry enables direct plunge entry without a pilot hole
• 30-degree helix angle promotes smooth cutting action and reduced chatter
• Right-hand cut and right-hand flute for use with conventional milling machine spindles

Compatibility

Rated for primary workpiece materials including cast iron (K), non-ferrous metals (N), and steel (P) as defined by ISO material group codes. Belongs to the Cleveland HG-3 series for high speed steel end mills.

Installation Notes

Installation should be performed by a qualified machinist. Secure the shank fully into a clean, properly sized end mill holder before tightening the set screw against the Weldon flat. Always power down and lock out the spindle before changing tooling. Follow shop-standard runout inspection procedures after mounting to verify concentricity before cutting.