Value Collection 723-3309 Square End Mill 5/8 in Cobalt

Product Description

The VALUE COLLECTION 723-3309 is a cobalt square end mill designed for metal cutting operations on machining centers, knee mills, and manual milling machines. Built from M42 cobalt high-speed steel, this single-end tool offers improved heat and wear resistance compared to standard HSS, making it well suited for harder ferrous materials and interrupted cuts. It carries a 5/8 inch cutting diameter, a 2-1/2 inch length of cut, and a 4-5/8 inch overall length. The bright, uncoated finish means the tool is ready to run as supplied, with no coating concerns for regrinding. Four right-hand spiral flutes at a 30-degree helix angle provide efficient chip evacuation and smooth cutting action across a range of feed and speed conditions.

This end mill is appropriate for general-purpose milling tasks in job shop, maintenance, and production environments. The long-series geometry, with its 2-1/2 inch length of cut, accommodates deeper pockets, slots, and peripheral milling passes where a standard-length tool cannot reach. It is centercutting, allowing direct plunge entry without a pre-drilled start hole. Suitable for ferrous metals including alloy steel, tool steel, and stainless, as well as some non-ferrous applications. Machinists, tool-and-die makers, and skilled trades professionals in manufacturing environments are the typical end users.

Key Features

• M42 cobalt HSS construction for enhanced heat resistance and extended tool life in hard or abrasive materials
• 4 right-hand spiral flutes with 30-degree helix angle for efficient chip evacuation
• Centercutting design allows direct plunge milling without a pilot hole
• Long-series length of cut (2-1/2 inches) reaches deeper pockets and slots
• Bright/uncoated finish — compatible with regrinding services and standard cutting fluids
• Right-hand cut and right-hand flute configuration for standard spindle rotation

Compatibility

Designed as a direct-fit replacement for 5/8 inch shank square end mill applications requiring a long-series cobalt tool. Compatible with any milling machine or machining center spindle accepting a 5/8 inch straight shank, including R8, CAT, BT, and ER collet toolholding systems sized for 5/8 inch shank diameter.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the shank firmly in a collet, end mill holder, or Weldon-style holder, torquing set screws per the toolholder manufacturer's specifications. Ensure the spindle and machine are fully de-energized and locked out before changing tooling. Verify runout with a dial indicator after seating the tool to confirm proper holder engagement before beginning a cut.