Cleveland C33266 4-Flute HSS Center Cutting Square Single End Mill

Cleveland C33266 4-Flute HSS End Mill

The Cleveland C33266 is a square single end mill designed for general milling operations. It features a 0.53125 inch milling diameter and a 1/2 inch shank with a Weldon flat for secure tool holding. This high-speed steel cutter suits machinists and maintenance technicians performing slotting or profiling tasks in ferrous and non-ferrous materials. The TiCN coating adds surface hardness for extended tool life.

Sustained cutting performance with TiCN coating

The TiCN coating provides increased hardness and heat resistance compared to uncoated tools, helping the cutter maintain edge integrity during prolonged milling cycles. High-speed steel construction offers toughness that resists chipping when engagement varies or when cutting through scale. The 4-flute geometry promotes stable chip evacuation at consistent feed rates, reducing vibration during extended passes. The non-coolant-through design relies on external flood or mist cooling for thermal management.

Installation notes and common issues

The Weldon flat shank locks into standard end mill holders with a set screw, providing a rigid connection that prevents pull-out during heavy cuts. Ensure the holder is clean and the set screw engages the flat fully to avoid runout. The 1.375 inch length of cut and 3 3/8 inch overall length require adequate machine clearance for deep pockets. Improper clamping or insufficient coolant flow are the primary causes of premature wear or tool breakage.