Cleveland C42703 Square End Mill 0.625 in 4 Flute Cobalt

Product Description

The CLEVELAND C42703 is a 4-flute cobalt square end mill designed for material removal in demanding machining applications. Built from M42 cobalt high-speed steel, it delivers elevated heat and wear resistance compared to standard HSS tooling. The cutter measures 0.625 inches in diameter with a 1.625-inch length of cut and a 3.75-inch overall length. A 30-degree helix angle promotes efficient chip evacuation and reduces cutting forces. This end mill is intended for use by machinists and tool-and-die professionals on manual or CNC milling machines.

The C42703 is rated for cutting high-temperature alloys, stainless steel, and carbon and alloy steels, making it well suited for job shop, aerospace component, and general precision machining environments. The centercutting geometry allows for plunge milling operations in addition to peripheral and slot milling. The straight cylindrical shank with Weldon flat accommodates standard end mill holders and set-screw style toolholders. This is a regular-length, uncoated end mill from the HGC-4C series.

Key Features

• M42 cobalt construction for superior heat resistance in tough alloy and stainless steel cuts
• 4-flute spiral flute geometry balances material removal rate with surface finish quality
• 30-degree helix angle promotes chip flow and reduces cutting pressure
• Centercutting design permits plunge entry without a pre-drilled pilot hole
• Right-hand cut, right-hand flute configuration — standard for conventional and climb milling
• Weldon flat on shank reduces pullout risk in set-screw toolholders under heavy loads

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 0.625-inch end mill holders, collet chucks, and Weldon-style set-screw holders used on vertical milling machines and CNC machining centers. Part of the Cleveland HGC-4C series for high-temperature alloy, stainless steel, and steel applications.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the holder and align the Weldon flat with the set screw before torquing. Verify runout with a dial indicator after clamping, especially for tight-tolerance finish cuts.