Cleveland C42715 Square End Mill 1 in 4 Flute Cobalt

Product Description

The CLEVELAND C42715 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 features a 1 inch cutting diameter, a 2 inch length of cut, and a 4-1/2 inch overall length. Four spiral flutes with a 30-degree helix angle promote efficient chip evacuation and smooth cutting action. The straight cylindrical shank with a Weldon flat provides secure tool holding in standard end mill holders. This is a centercutting tool, allowing plunge cuts in addition to peripheral and slot milling.

The C42715 is intended for use on vertical and horizontal milling machines, machining centers, and manual knee mills. It is well suited for shops working in aerospace, defense, and industrial manufacturing where stainless steel and high-temperature alloys are common workpiece materials. The uncoated M42 cobalt construction makes it a practical choice when regrinding is preferred over coated tooling. Right-hand cut and right-hand flute geometry follows standard spindle rotation, making setup straightforward on conventional equipment.

Key Features

• M42 cobalt material grade for elevated heat resistance and tool life in tough alloys
• 4 spiral flutes with 30-degree helix angle for efficient chip flow and smooth cutting action
• Centercutting design allows plunge milling in addition to slot and peripheral cuts
• Straight cylindrical shank with Weldon flat for positive retention in end mill holders
• Right-hand cut, right-hand flute geometry for use with standard spindle rotation
• Uncoated finish suits applications where regrinding or resharpening is part of the tooling program

Compatibility

Designed as a standard straight-shank end mill compatible with 1 inch bore end mill holders, collet chucks, and Weldon-flat side-lock holders used on vertical and horizontal milling machines and CNC machining centers. Belongs to the CLEVELAND HGC-4C series.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the machine is placed in an appropriate lockout state before changing tooling. Seat the shank fully into the holder and verify the Weldon flat is aligned with the set screw before torquing. Confirm runout with a dial indicator before commencing the cut, particularly when working with close-tolerance features or hard materials.