Cleveland C32691 Square End Mill 1/4 in 4 Flute Cobalt

Product Description

The CLEVELAND C32691 is a cobalt square end mill designed for material removal in demanding machining applications. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance needed when cutting high-temperature alloys, stainless steel, and carbon steel. The tool measures 0.250 inches in diameter with a 1.750-inch length of cut, a 0.375-inch straight-cylindrical or Weldon flat shank, and a 3.563-inch overall length. Four right-hand spiral flutes at a 30-degree helix angle promote efficient chip evacuation and smooth cutting action. The centercutting geometry allows plunge entry as well as conventional peripheral milling.

This end mill is suited for milling operations on CNC machining centers and manual knee mills in job shop, aerospace, and industrial maintenance environments. The extra-long length of cut makes it well suited for deeper pockets and slots where a standard-length tool cannot reach the full depth in a single pass. It is intended for use by machinists and tooling technicians working with high-temperature alloys, stainless steel, and steel workpieces. The Series HGC-4C designation identifies it as part of a cobalt four-flute extra-long product family from CLEVELAND.

Key Features

• M42 cobalt construction resists heat buildup when cutting hard and abrasive materials
• Four flutes with 30-degree right-hand helix for efficient chip evacuation and surface finish
• Centercutting design allows direct plunge entry without pre-drilling
• Extra-long 1.750-inch length of cut for deeper pockets and slot milling
• Straight-cylindrical shank with optional Weldon flat for secure tool holding
• Uncoated finish suitable for use with appropriate cutting fluids on ferrous materials

Compatibility

Designed for machining high-temperature alloys, stainless steel, and steel workpieces. Fits standard 3/8-inch collets, end mill holders, and Weldon-style set-screw holders used on CNC and manual milling machines.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power locked out per shop safety procedures. Confirm holder bore size matches the 0.375-inch shank before mounting. Torque set screws or collet nuts to the tool holder manufacturer specifications. Select appropriate cutting fluid or coolant for the workpiece material to maximize tool life.