Osg 5415200 Square End Mill 1-1/8 Inch 4 Flute Cobalt

Product Description

The OSG 5415200 is a cobalt square end mill designed for milling operations in ferrous and high-temperature alloy materials. Built to Series 541 specifications, it features a 1-1/8 inch cutting diameter, a 2 inch length of cut, and a 4-flute spiral configuration with a 30-degree right-hand helix. The cobalt M42 grade substrate provides elevated heat resistance compared to standard high-speed steel, making it well suited for harder workpiece materials. This tool ships single-end and uncoated. It is installed and operated by machinists, tool-and-die makers, and CNC mill operators working in job shop, maintenance, or production environments.

This end mill is used in vertical and horizontal milling machines as well as CNC machining centers for slotting, peripheral milling, and plunge cutting. The centercutting geometry allows direct plunge entry into the workpiece without pre-drilling. The 1 inch shank diameter fits standard ER and side-lock toolholders common to production and toolroom setups. At 4-1/2 inches overall length, this is a regular-length tool appropriate for general-purpose milling depths within its 2 inch length of cut range.

Key Features

• Cobalt M42 substrate for improved heat and wear resistance over standard HSS
• 4-flute spiral design with 30-degree right-hand helix for efficient chip evacuation
• Centercutting geometry allows direct plunge milling without pre-drilling
• Right-hand cut and right-hand flute direction for standard spindle rotation
• Uncoated finish suitable for re-sharpening and use with cutting fluids
• Series 541 regular-length specification for dimensional consistency

Compatibility

Designed as an OEM-style replacement or standard toolroom end mill for use in milling machines and machining centers accepting a 1 inch straight shank.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with rotating cutting tool safety. Confirm the spindle is fully stopped and the machine is locked out before installing or removing the tool. Seat the shank fully in the toolholder and torque the retention mechanism per the toolholder manufacturer specifications. Verify runout with a dial indicator before engaging the first cut.