Cleveland C39755 Square End Mill 1/4 in 3 Flute Hss Tin

Product Description

The CLEVELAND C39755 is a single-end square end mill designed for precision milling operations in metalworking and machining environments. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, this tool delivers improved surface hardness and wear resistance compared to uncoated HSS. It features a 1/4 inch cutting diameter, a 1-1/4 inch length of cut, and a 3/8 inch straight cylindrical shank with a Weldon flat for secure toolholder engagement. The 30-degree spiral flute geometry and three-flute configuration promote efficient chip evacuation during cutting. This end mill is installed and operated by machinists and CNC tooling professionals in shop environments.

The C39755 is suited for milling operations on cast iron, non-ferrous metals, and steel. Its centercutting capability allows both plunge and peripheral milling. The long-series HG-3 classification provides extended reach for deeper pockets and stepped features where standard-length end mills cannot access. It performs in both manual milling machines and CNC machining centers running appropriate feeds and speeds for HSS tooling.

Key Features

• High speed steel construction with TiN coating for extended tool life
• Three right-hand spiral flutes at 30-degree helix angle for efficient chip removal
• Centercutting design enables plunge milling and slot entry cuts
• Weldon flat on straight cylindrical shank for positive toolholder retention
• Long-series HG-3 classification for extended reach applications
• Right-hand cut and right-hand flute configuration

Compatibility

Designed for use in standard milling machine collets and end mill holders accepting a 3/8 inch shank diameter. Rated for primary workpiece materials including cast iron, non-ferrous metals, and steel.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the machine spindle is fully stopped and locked out before mounting or removing tooling. Secure the Weldon flat against the toolholder set screw and verify runout before initiating a cut. Select feeds and speeds appropriate for HSS tooling and the specific workpiece material being machined.