Osg 4300100 Square End Mill 0.5in 3 Flute Cobalt

Product Description

The OSG 4300100 is a 3-flute cobalt square end mill designed for general-purpose milling in a wide range of ferrous and non-ferrous materials. It features a 0.5 inch cutting diameter, a 1.25 inch length of cut (LOC), and a 0.5 inch shank diameter, with a 3.25 inch overall length (OAL). The 35-degree helix angle promotes smooth chip evacuation and reduces cutting forces. The uncoated cobalt construction provides toughness and heat resistance in demanding shop environments. This tool is well suited for slotting, profiling, and peripheral milling operations.

This end mill is intended for use in vertical machining centers, manual knee mills, and CNC milling machines. It is a single-end, center-cutting tool with a right-hand cut, meaning it can be plunged directly into a workpiece as well as used for conventional side milling. The coarse pitch and 3-flute geometry make it a practical choice for applications where chip clearance and tool life in tougher alloys are priorities. It belongs to the OSG Series 430 product line.

Key Features

• 0.5 inch cutting diameter with 1.25 inch length of cut for medium-depth slotting and profiling
• 3-flute cobalt construction balances chip clearance with tool rigidity
• 35-degree helix angle promotes efficient chip evacuation and smooth cutting action
• Center-cutting design allows direct plunge entry into workpiece material
• Right-hand cut, single-end configuration for standard milling setups
• Uncoated finish for straightforward resharpening in tool-and-die or maintenance shop environments

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for 0.5 inch collet or end mill holders on standard vertical and CNC milling machines accepting a 0.5 inch shank diameter.

Installation Notes

Installation is performed by machinists or toolroom personnel. Secure the 0.5 inch shank in a properly sized collet chuck or end mill holder and torque to the spindle manufacturer's specification. Verify runout with a dial indicator before cutting, as excessive runout accelerates tool wear and reduces surface finish quality. Ensure the machine spindle is fully stopped and locked out before changing or adjusting tooling.