Cleveland C33721 2-Flute HSS Square Double End Mill .75 in TiCN

Cleveland C33721 Double End Mill

The Cleveland C33721 is a 2-flute high-speed steel square end mill with a TiCN coating. It features a 0.75 inch milling diameter and a matching 3/4 inch shank with a Weldon flat. The tool measures 5 5/8 inches overall with a 1.3125 inch length of cut. This cutter suits general-purpose slotting and profiling in ferrous materials.

High-speed steel limits in abrasive alloys

High-speed steel offers toughness but wears faster than carbide in hardened steels or high-silicon aluminium. The TiCN coating extends life in moderate-heat cuts yet cannot prevent edge breakdown at very high surface speeds. Coolant supply is external only, so chip evacuation in deep pockets relies on flute geometry and operator technique.

Replaces single-end HSS cutters for cost savings

A double-end mill provides two cutting ends per holder, reducing tool-change downtime and per-edge cost compared with single-end equivalents. The jump is worthwhile when machining softer steels or non-ferrous parts where HSS toughness prevents chipping. It is not for production runs in hardened tool steels where carbide tooling maintains tolerance longer.