Cleveland C33660 Square End Mill 5/16 in 2 Flute Hss Tin

Product Description

The CLEVELAND C33660 is a double-end, two-flute square end mill machined from high speed steel and finished with a titanium nitride (TiN) coating. It measures 5/16 inch in cutting diameter with a 9/16 inch length of cut, a 3/8 inch straight cylindrical or Weldon flat shank, and a 3-1/2 inch overall length. The 30-degree spiral flute geometry promotes efficient chip evacuation, while the centercutting design allows both plunge and peripheral milling operations. Right-hand cut and right-hand flute orientation are standard. This tool is part of the CLEVELAND HD-2 series, built for rigorous production and job-shop milling work.

This end mill is suited for milling operations on cast iron, non-ferrous metals, and steel. The regular-length profile and compact cutting diameter make it a practical choice for slotting, profiling, and light contouring in both manual mills and CNC machining centers. The double-end design extends tool life by providing two usable cutting ends per tool. It is commonly used in machine shops, maintenance facilities, and production environments where cost-per-cut efficiency matters.

Key Features

• Double-end design provides two cutting ends per tool, reducing tooling cost per operation
• TiN coating increases surface hardness and reduces friction for longer tool life
• Centercutting geometry allows direct plunge entry into the workpiece
• 30-degree helix angle promotes smooth cutting action and effective chip removal
• Straight cylindrical shank with Weldon flat for secure tool holding
• Compatible with cast iron, non-ferrous metals, and steel workpiece materials

Compatibility

Designed for use in standard milling machines and CNC machining centers accepting a 3/8 inch straight shank. Suitable for primary workpiece materials including cast iron, non-ferrous metals, and steel as specified by the manufacturer.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully in the collet or end mill holder and torque the retention hardware according to the tool holder manufacturer specifications. Verify runout with a dial indicator before beginning the cut, especially in precision applications.