Osg 5303200 Square End Mill 7/8 in 2 Flute Cobalt

Product Description

The OSG 5303200 is a cobalt square end mill designed for precision milling in ferrous and difficult-to-machine materials. Built to Series 530 specifications, it features a 7/8-inch cutting diameter, a 1-7/8-inch length of cut, and a 3/4-inch shank diameter with an overall length of 4-1/8 inches. The 45-degree helix spiral flute geometry promotes efficient chip evacuation and smooth cutting action. Manufactured from M42 cobalt high-speed steel, this tool delivers heat resistance and edge retention in demanding shop environments. It ships uncoated and is intended for machinists and tool-and-die professionals running manual or CNC milling operations.

This end mill is suited for peripheral and slot milling in steel, stainless steel, cast iron, and similar ferrous workpiece materials where cobalt-grade tooling is specified. The centercutting design allows direct plunge entry into the workpiece without a pre-drilled hole. The right-hand cut and right-hand flute configuration is standard for conventional vertical and horizontal milling setups. Regular-length geometry fits most standard tool holders and collets accepting a 3/4-inch shank.

Key Features

• M42 cobalt construction for elevated heat resistance and edge retention
• 45-degree helix angle for efficient chip flow and reduced cutting forces
• Centercutting capable — supports direct plunge milling without pilot hole
• 2-flute design provides increased chip clearance in slotting applications
• Right-hand cut, right-hand flute — standard CNC and manual mill configuration
• Uncoated finish — compatible with standard cutting fluid application

Compatibility

Designed as an OEM-style replacement or direct application end mill for milling operations requiring a 3/4-inch shank, 7/8-inch diameter, cobalt square end mill in the OSG Series 530 product line.

Installation Notes

Installation is performed by a machinist or tooling technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Secure the shank in a collet or end mill holder rated for the 3/4-inch shank diameter and verify runout with a dial indicator before cutting. Follow the machine manufacturer and tooling guidelines for appropriate feed and speed settings for the workpiece material.