Cleveland C42699 Square End Mill 0.5in 4 Flute Cobalt

Product Description

The CLEVELAND C42699 is a 4-flute cobalt square end mill designed for material removal in demanding machining applications. Built to Series HGC-4C specifications, it features a 0.5-inch diameter, a 1.25-inch length of cut, and a 3.25-inch overall length. The M42 cobalt construction provides elevated heat resistance and edge retention compared to standard HSS tooling, making it well suited for interrupted cuts and harder work materials. The spiral flute geometry and 30-degree helix angle promote efficient chip evacuation and stable cutting action across a range of ferrous materials.

This end mill is intended for use on ferrous alloys including steel, stainless steel, and high-temperature alloys, which correspond to material codes P, M, and S. The centercutting design allows for direct plunge entry, expanding its utility in slotting and profiling operations. The straight cylindrical shank with Weldon flat is compatible with standard end mill holders and set-screw style tool holders commonly found in manual mills and CNC machining centers. The uncoated finish is standard for applications where post-machining coating or regrinding is anticipated.

Key Features

• M42 cobalt steel construction for improved heat and wear resistance over standard HSS
• 30-degree helix angle promotes smooth cutting action and efficient chip flow
• Centercutting geometry allows plunge milling and ramping operations
• Right-hand cut and right-hand flute configuration for standard spindle operation
• Weldon flat on straight shank provides positive drive and reduces pullout risk
• Spiral flute, uncoated finish suitable for regrinding and recoating programs

Compatibility

Designed as an OEM-style replacement or direct-use tooling for applications requiring a 0.5-inch diameter, 4-flute cobalt square end mill with a straight cylindrical shank and Weldon flat in Series HGC-4C.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Power down and lock out the machine spindle before inserting or removing the end mill. Seat the shank fully into the tool holder and torque the set screw against the Weldon flat per the tool holder manufacturer's specification. Inspect the cutting edges for damage before each use and confirm runout is within acceptable limits before beginning a cut.