Cleveland C52155 Square End Mill 0.25 in 2 Flute Cobalt

Product Description

The CLEVELAND C52155 is a cobalt square end mill designed for high-performance material removal in demanding machining applications. Built to M42 cobalt material grade, this double-end, center-cutting tool features a 0.25-inch mill diameter, a 0.5-inch length of cut, and a 3/8-inch straight-cylindrical or Weldon flat shank. The 30-degree spiral flute geometry promotes efficient chip evacuation and heat resistance, making it well-suited for production environments where tool longevity under load is a priority. Licensed machinists and tool-and-die professionals install this end mill in CNC and manual milling machines where consistent edge geometry is critical.

The C52155 is rated for use on high-temperature alloys, stainless steel, and carbon and alloy steels. Its regular-length classification and 3-3/8-inch overall length make it a standard choice for pocketing, slotting, and peripheral milling operations in job shops, aerospace component shops, and general metalworking facilities. The right-hand cut and right-hand flute configuration is the standard orientation for conventional milling setups.

Key Features

• M42 cobalt construction for improved heat and wear resistance over standard HSS tooling
• Center-cutting design allows plunge milling in addition to peripheral and slot cuts
• 30-degree helix angle promotes smooth chip flow and reduces cutting forces
• Double-end configuration provides two usable cutting ends, extending tool service life
• Straight-cylindrical or Weldon flat shank accommodates a wide range of collet and end mill holder types
• Uncoated finish suitable for use with cutting fluids on ferrous and high-temp alloy workpieces

Compatibility

Designed for use on high-temperature alloys, stainless steel, and steel workpieces; fits standard 3/8-inch end mill holders, collets, and Weldon-style chucks.

Installation Notes

Installation is performed by qualified machinists following shop-standard toolholding procedures. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully in the holder and torque set screws to the holder manufacturer specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates edge wear and reduces surface finish quality.