Cleveland C39717 Square End Mill 3/4 in 3 Flute Hss Ticn

Product Description

The CLEVELAND C39717 is a single-end square end mill designed for precision milling in metalworking and machining applications. Built from high speed steel (HSS) with a TiCN (titanium carbonitride) finish, it delivers improved wear resistance and surface hardness compared to uncoated HSS. The cutter features a 0.750-inch mill diameter, a 1.625-inch length of cut, and a 3-7/8-inch overall length. Three spiral flutes and a 30-degree helix angle promote efficient chip evacuation and smooth cutting action. The centercutting geometry allows direct plunge entry without a pre-drilled pilot hole, making this tool versatile across a range of milling operations.

This end mill is suited for milling cast iron, non-ferrous metals, and steel in production and job-shop environments. The straight-cylindrical shank with Weldon flat accommodates standard side-lock toolholders, providing secure clamping under load. It is a regular-length tool, fitting general-purpose roughing and finishing passes where an extended-reach configuration is not required. Machinists and tool-and-die professionals working on manual mills and CNC machining centers will find this a practical utility cutter for everyday material removal tasks.

Key Features

• TiCN coating improves surface hardness and extends tool life compared to uncoated HSS
• Centercutting design enables direct plunge milling without a pilot hole
• 30-degree helix angle supports efficient chip flow and reduced heat buildup
• Three flutes balance chip room with rigidity for steel and cast iron applications
• Straight-cylindrical shank with Weldon flat for secure side-lock toolholder grip
• Right-hand cut and right-hand flute - standard rotation for conventional and climb milling

Compatibility

Designed for use with cast iron, non-ferrous metals, and steel workpiece materials. Compatible with standard 3/4-inch diameter collets, end mill holders, and Weldon-style side-lock toolholders. Part of the CLEVELAND HG-3 series of high speed steel end mills.

Installation Notes

Installation and removal should be performed by a qualified machinist with the machine powered off and spindle locked. Ensure the toolholder bore and shank are clean and free of chips or burrs before seating the end mill. Weldon flat must align with the setscrew to prevent axial pullout under cutting loads. Follow shop safety practices and machine manufacturer runout specifications when setting tool projection length.