Osg 86300909 Square End Mill 3/8 in 3 Flute Solid Carbide

Product Description

The OSG 86300909 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. It features a 3/8 inch cutting diameter, a 1.5 inch length of cut, and a 4 inch overall length, making it well-suited for slotting, profiling, and peripheral milling. The 40-degree helix angle promotes efficient chip evacuation and reduced cutting forces. A diamond-like carbon (DLC) finish is applied to improve surface hardness and extend tool life. This end mill is centercutting, allowing direct plunge entry into the workpiece. It is installed and operated by machinists and CNC tooling professionals in job shop and production environments.

The OSG 86300909 is intended for use in CNC machining centers and manual milling machines where a standard 3/8 inch shank toolholder or collet is used. The right-hand cut and right-hand flute configuration is the standard orientation for conventional and climb milling. The micrograin carbide substrate supports higher cutting speeds and feeds compared to standard carbide grades. This tool is commonly selected for finishing and semi-finishing passes on ferrous and non-ferrous materials where a DLC coating provides a performance advantage.

Key Features

• 3/8 inch cutting diameter with matching 3/8 inch shank diameter for direct collet mounting
• 1.5 inch length of cut supports moderate-depth slotting and profiling operations
• 40-degree helix angle promotes efficient chip flow and reduced heat buildup
• DLC finish increases surface hardness and reduces friction at the cutting edge
• Centercutting design allows plunge milling without a pre-drilled entry point
• Micrograin solid carbide substrate supports elevated cutting speeds and extended tool life

Compatibility

Designed for use in standard 3/8 inch shank toolholders, collet chucks, and end mill holders on CNC machining centers and conventional knee mills. No specific machine model compatibility was provided by the manufacturer for this part number.

Installation Notes

Installation is performed by a machinist or CNC setup technician. Power down and lock out the spindle before mounting or removing the end mill. Seat the shank fully into the collet or toolholder and torque the retention hardware according to the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning the cut, as excessive runout will reduce tool life and surface finish quality.