Cleveland C33766 2-Flute HSS Square End Mill TiN

Two-Flute HSS End Mill with TiN Coating

This Cleveland C33766 square end mill is built from high-speed steel and coated with titanium nitride for extended tool life. It suits general-purpose milling in ferrous and non-ferrous materials where a standard two-flute geometry provides efficient chip evacuation. The Weldon flat on the 3/8 in shank ensures a secure grip in standard tool holders. Machinists and maintenance teams will find it reliable for slotting, profiling and plunge cuts.

Practical Limits of a Two-Flute HSS Design

High-speed steel offers toughness but lower hot hardness than carbide, so cutting speeds must stay moderate to avoid premature wear. The two-flute layout gives good chip space but less core strength than three- or four-flute tools, limiting feed rates in deep slots. TiN coating reduces friction and allows slightly higher speeds than uncoated HSS, yet the material still caps performance in hardened steels or high-volume production. Rigid setups and flood coolant are essential to reach consistent results.

Capacity and Headroom in Everyday Use

With a 0.40625 in cutting diameter and 0.8125 in length of cut, the tool handles medium-depth slots and pockets in aluminium, mild steel and plastics comfortably. The 2 11/16 in overall length gives adequate reach for most bench-top mill jobs without excessive overhang. It runs out of headroom in deep cavities, high-speed finishing passes or abrasive alloys where carbide would last longer. For general workshop milling within these bounds it delivers solid, repeatable performance.