Cleveland C32661 Square End Mill 7/16 in 4 Flute Cobalt

Product Description

The CLEVELAND C32661 is a 4-flute cobalt square end mill designed for high-performance milling in demanding materials. Built from M42 cobalt high-speed steel, it offers superior heat and wear resistance compared to standard HSS tooling. The cutter features a TiN (titanium nitride) coating that further extends tool life and reduces friction at the cutting edge. With a 7/16-inch cutting diameter and a 1-3/4-inch length of cut, this tool handles slotting, profiling, and peripheral milling operations. Spiral flutes with a 30-degree helix angle promote efficient chip evacuation. Machinists and tool-and-die professionals install this end mill in CNC machining centers and manual knee mills.

This end mill is suited for milling high-temperature alloys, stainless steel, and general steel workpieces. The HGC-4C long series designation provides additional reach compared to standard-length tooling, making it useful where extended projection is needed without sacrificing rigidity. The straight-cylindrical shank with a Weldon flat accommodates standard side-lock tool holders with a 3/8-inch bore. It is centercutting, allowing direct plunge entry into the workpiece. Right-hand cut and right-hand flute geometry follow conventional milling orientation for use in standard spindle configurations.

Key Features

• M42 cobalt construction for elevated heat resistance in tough alloys
• TiN coating reduces friction and extends cutting edge life
• 4-flute, spiral design with 30-degree helix angle for efficient chip removal
• Centercutting geometry allows direct plunge milling
• Long series (HGC-4C) provides greater reach than standard-length end mills
• Weldon flat on straight shank ensures positive drive in side-lock holders

Compatibility

Designed for use in 3/8-inch bore side-lock or Weldon-flat tool holders. Suitable for milling high-temperature alloys, stainless steel, and steel workpieces as noted by Primary Workpiece Material Codes M, P, and S. Part of the CLEVELAND HGC-4C series.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Verify spindle and tool holder bore size matches the 3/8-inch shank diameter before mounting. Secure the Weldon flat against the set screw in the holder to prevent pull-out under cutting load. Confirm correct spindle rotation direction (right-hand) before engaging the workpiece, and apply appropriate cutting fluid or air blast for chip clearance in stainless and alloy applications.