Harvey Tool 27420-C3 Drill Mill 5/16 in 4 Flute Altin Carbide

Product Description

The HARVEY TOOL 27420-C3 is a solid carbide drill mill designed to perform both drilling and end milling operations in a single tool. With a 5/16 inch diameter and a 100-degree point angle, it enters material cleanly and transitions into side milling without a tool change. The 4-flute geometry supports efficient chip evacuation during milling passes. An AlTiN coating improves heat resistance and extends tool life in ferrous and hardened materials. With an overall length of 2.5 inches and a 13/16 inch length of cut, this tool is suited for compact setups where rigidity matters.

This drill mill is intended for use in CNC machining centers and manual mills across production and job-shop environments. It is well suited for applications requiring spot drilling, through-hole drilling, chamfering, and peripheral milling in the same operation. Machinists working with steel, stainless, cast iron, and similar ferrous alloys will benefit from the AlTiN finish under dry or minimal-lubrication conditions. The 5/16 inch shank diameter matches standard collet and end mill holder sizes.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding materials
• 100-degree point angle enables accurate spot drilling and chamfering in one pass
• 4-flute design supports both drilling entry and milling operations
• AlTiN coating provides thermal protection and extends tool life in ferrous alloys
• 5/16 inch diameter with matching shank fits standard collet systems
• 0.812 inch length of cut allows sufficient depth for most light-to-medium milling operations

Compatibility

Designed for use in CNC machining centers and milling machines equipped with standard collet or end mill holders accepting a 5/16 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist familiar with rotary cutting tool setup. Secure the shank fully within the collet or holder to the recommended gauge length before tightening. Confirm spindle runout is within acceptable limits before engaging the workpiece, as excessive runout accelerates carbide tool wear. Always bring the spindle to a complete stop before measuring, adjusting, or removing the tool.