Osg 84300223 Ball End Mill 0.25 in 4 Flute Solid Carbide

Product Description

The OSG 84300223 is a 4-flute solid carbide ball end mill designed for high-precision finishing and roughing operations on hard materials and steels. Built to Series 8430 specifications, it features a 0.25 inch mill diameter, a 40-degree high helix angle, and a DUROREY PVD coating that extends tool life in demanding cutting conditions. The variable index flute geometry reduces chatter and improves surface finish. This tool is intended for use by machinists and tooling professionals working in CNC milling applications where tight tolerances and consistent performance are required.

This ball end mill is suited for machining hard materials, including high-hardness steels, in both roughing and finishing passes. Its 0.5 inch length of cut and 3.5 inch overall length make it appropriate for standard-depth milling operations. The straight cylindrical shank and right-hand cutting direction are compatible with conventional CNC machining center setups. It operates as a single-end tool, delivering controlled material removal where surface integrity and dimensional accuracy are critical.

Key Features

• DUROREY PVD coating for extended tool life in hard and abrasive materials
• 40-degree high helix angle promotes efficient chip evacuation and smooth cutting action
• Variable index flute spacing reduces harmonic vibration during cutting
• Solid carbide construction provides rigidity and wear resistance compared to HSS alternatives
• Right-hand cut and right-hand flute direction for standard CNC spindle compatibility
• Single-end design optimized for finishing and roughing on high-hardness steels

Compatibility

Designed as an OEM-style solid carbide ball end mill in the OSG Series 8430 line, suited for use with standard straight-bore CNC tool holders accepting a 0.25 inch cylindrical shank. Primary workpiece material is hard material; secondary workpiece material is steel.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is in a safe state before inserting or removing the tool from the holder. Seat the shank fully in the collet or end mill holder and torque the retention mechanism to the tool holder manufacturer specification. Verify runout after installation before beginning a cutting pass to protect both the tool and the workpiece.