Osg HP421-2188 Square End Mill 7/32 Inch 2 Flute Carbide

Product Description

The OSG HP421-2188 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. With a 7/32 inch (0.2188 inch) cutting diameter and a 5/8 inch length of cut, this tool delivers consistent material removal in steel, stainless, cast iron, and non-ferrous alloys. The TiAlN coating improves heat resistance and extends tool life in dry or near-dry cutting conditions. A 35-degree helix angle promotes smooth chip evacuation and reduces cutting forces. This end mill is installed and used by machinists and tool-and-die professionals operating CNC machining centers and manual mills.

The HP421-2188 is suited for slotting, profiling, and light roughing passes in ferrous and non-ferrous materials. The 1/4 inch shank diameter makes it compatible with standard collet chucks and end mill holders commonly found in vertical machining centers and milling machines. Its centercutting geometry allows plunge entry directly into the workpiece. The two-flute configuration provides chip clearance that is well matched to softer materials and applications where chip load management is critical.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• TiAlN finish improves thermal resistance in high-speed dry cutting
• 35-degree spiral flute helix for efficient chip evacuation and reduced cutting force
• Centercutting design allows direct plunge milling without pre-drilling
• Right-hand cut and right-hand flute configuration for standard spindle operation
• Two-flute layout provides generous chip gullet for soft metal and general-purpose milling

Compatibility

Designed as an OEM-style tooling solution for use with standard 1/4 inch collet chucks and end mill holders on CNC and manual milling machines. Part of the OSG HP421 series for general-purpose solid carbide end milling.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for tool clamping torque and runout specifications. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Seat the shank fully into the collet or holder and verify runout before beginning a cut. Follow applicable shop safety standards and machine guarding requirements during operation.