Osg 402-250008 Square End Mill 0.25in 2 Flute Solid Carbide

Product Description

The OSG 402-250008 is a 2-flute solid carbide square end mill designed for precision milling in metalworking and machining applications. With a 0.25 inch cutting diameter, a 0.75 inch length of cut, and a 2.5 inch overall length, this tool delivers accurate square-shoulder and slot milling. The TiCN (Titanium Carbonitride) finish improves surface hardness and wear resistance compared to uncoated carbide. A 30-degree helix angle and spiral flute geometry promote efficient chip evacuation and smooth cutting action. Micrograin carbide construction supports use in demanding materials where edge retention is critical. This end mill ships individually and is suited for machinists and tooling professionals running CNC mills or manual knee mills.

The 402-250008 is built for general-purpose and finishing operations in ferrous and non-ferrous metals, including steel, stainless, aluminum, and cast iron. Its centercutting capability allows plunge entry directly into the workpiece without a pre-drilled hole, making it practical for pocketing, slotting, and profiling operations. The regular-length geometry and standard 0.25 inch shank fit common collet and end mill holder systems used across CNC machining centers and manual milling setups in production shops and maintenance environments.

Key Features

• Solid micrograin carbide construction for extended tool life in hard and abrasive materials
• TiCN finish increases surface hardness and reduces wear at the cutting edge
• 30-degree helix spiral flute promotes chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge entry for pocketing operations
• Right-hand cut and right-hand flute configuration for standard spindle rotation
• 2-flute geometry provides larger chip clearance for slotting and softer material applications

Compatibility

Designed as a standard-shank replacement end mill compatible with 0.25 inch collets, ER collet chucks, and end mill holders on CNC machining centers and manual milling machines. Part of the OSG Series 402 line.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or holder to the recommended grip depth and torque the retention mechanism to the tool holder specification. Inspect the cutting edge for chips or wear before each use and replace the tool if edge condition is degraded.