Osg HP441-5625 Square End Mill 9/16 in 4 Flute Carbide

Product Description

The OSG HP441-5625 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. It features a 9/16 inch cutting diameter, a 1-1/8 inch length of cut, and a 3-1/2 inch overall length. The four-flute, spiral geometry with a 35-degree helix angle promotes efficient chip evacuation and smooth cutting action. A TiAlN coating improves heat resistance and extends tool life in demanding ferrous and hardened material applications. This end mill is centercutting, allowing plunge entry, and runs with right-hand cut and right-hand flute orientation. It is sized for standard 9/16 inch collet or toolholder setups on CNC machining centers and manual mills.

The HP441-5625 is suited for finish and semi-finish milling of steel, stainless steel, and similar alloys in both production and job-shop settings. The micrograin carbide substrate provides rigidity and wear resistance under high-speed cutting conditions. Its non-variable helix and non-variable index design supports consistent, predictable performance. This tool is typically installed and run by machinists and CNC operators working in precision part manufacturing, tool and die, and general metalworking applications.

Key Features

• Solid micrograin carbide construction for rigidity and extended tool life
• TiAlN coating for improved heat resistance in high-speed ferrous machining
• Four spiral flutes with 35-degree helix angle for efficient chip evacuation
• Centercutting design allows direct plunge entry into the workpiece
• Right-hand cut, right-hand flute orientation for standard CNC and manual mill setups
• 9/16 inch shank diameter matches standard collet and end mill holder sizes

Compatibility

Designed for use in standard 9/16 inch end mill holders, collet chucks, and shrink-fit toolholders on CNC machining centers and manual vertical mills. Part of the OSG HP441 series.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the shank fully within the toolholder to the recommended gauge-line depth before tightening. Verify spindle direction and programmed feed and speed parameters before engaging the cut. Inspect the cutting edges and coating condition before each use and replace the tool at first sign of chipping or excessive wear.