Osg HP441-8750 Square End Mill 7/8 Inch 4 Flute Solid Carbide

Product Description

The OSG HP441-8750 is a solid carbide square end mill designed for high-performance milling operations in ferrous and non-ferrous metals. It features a 7/8 inch cutting diameter with a 1-1/2 inch length of cut, a 4-flute spiral geometry, and a 35-degree helix angle. The TiAlN coating provides heat resistance and extended tool life under demanding cutting conditions. At 4 inches overall length with a 7/8 inch shank diameter, this is a right-hand cut, right-hand flute, centercutting end mill suited for slotting, profiling, and plunge operations. It is typically installed in CNC machining centers, manual mills, or toolroom equipment by machinists and tooling professionals.

This end mill is suited for production and toolroom environments requiring precision milling in steel, stainless, cast iron, and similar materials. The centercutting design allows direct plunge entry without pre-drilling. The 35-degree helix promotes chip evacuation and reduces cutting forces, making it appropriate for both roughing and finishing passes in general-purpose machining applications. Single-end configuration means the tool is replaced rather than flipped when the cutting edge is worn.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding materials
• TiAlN finish for elevated heat resistance and extended tool life
• 4-flute spiral geometry with 35-degree helix for efficient chip evacuation
• Centercutting design supports direct plunge milling without a pilot hole
• Right-hand cut and right-hand flute configuration for standard spindle operation
• Regular length profile with 7/8 inch shank matching cutting diameter for maximum rigidity

Compatibility

Designed for use in standard ER, CAT, BT, or HSK toolholders accepting a 7/8 inch shank diameter. Suitable for CNC machining centers and manual milling machines configured for right-hand rotation.

Installation Notes

This tool should be installed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and locked out before inserting or removing the end mill from the toolholder. Use a properly sized collet or end mill holder to achieve full shank engagement and minimize runout. Verify tool stick-out is minimized for optimal rigidity before beginning the cut.