Osg HP441-7874 Square End Mill 0.7874 in 4 Flute Carbide

Product Description

The OSG HP441-7874 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. Built to HP441 series specifications, it features a 0.7874 inch (20 mm) mill diameter, a 1.4961 inch (38 mm) length of cut, and four straight flutes with a 35-degree helix angle. The micrograin carbide construction provides hardness and edge retention under demanding cutting conditions. A TiAlN coating improves heat resistance and tool life when machining ferrous and high-temperature alloy materials. This tool is centercutting, allowing plunge operations in addition to peripheral and slot milling.

The HP441-7874 is suited for use in CNC machining centers and manual mills where tight tolerances and consistent surface finishes are required. The right-hand cut and right-hand flute configuration make it compatible with standard spindle rotation on vertical and horizontal machining centers. It is commonly applied in job shops and production environments for slotting, profiling, and contouring operations in steel, stainless steel, and similar ferrous materials. Licensed machinists and CNC operators are the primary users of this tool.

Key Features

• 0.7874 inch (20 mm) mill diameter with 1.4961 inch (38 mm) length of cut
• Four straight flutes with 35-degree helix angle for controlled chip evacuation
• Solid micrograin carbide construction for hardness and edge retention
• TiAlN finish for elevated heat resistance and extended tool life
• Centercutting design enables plunge milling capability
• Right-hand cut, right-hand flute — compatible with standard CNC spindle rotation

Compatibility

Designed for use in standard CNC machining centers and manual mills accepting a 20 mm (0.7874 inch) shank diameter tool holder. Part of the OSG HP441 series.

Installation Notes

Installation requires a compatible tool holder or collet sized for a 20 mm shank diameter. Secure the end mill to the recommended engagement depth before tightening the tool holder to prevent runout. Verify spindle rotation direction matches the right-hand cut orientation before initiating a cut. Follow machine tool manufacturer guidelines and applicable shop safety standards when changing tooling.