Harvey Tool 822560-C3 Combo Drill Countersink Size 4

Product Description

The HARVEY TOOL 822560-C3 is a solid carbide combined drill and countersink designed for precision center drilling and countersinking in a single operation. It features an AlTiN coating for extended tool life in demanding materials and a 118-degree drill point angle with a 120-degree included countersink angle. The 5/16-inch body diameter and 1/8-inch drill point diameter make this a Trade Size 4 tool suitable for creating accurate center holes and countersink profiles on mill and lathe workpieces. At 2.5 inches overall length, it fits standard tool holders used in metalworking and machining applications.

This combined drill and countersink is used in CNC machining centers, manual mills, and engine lathes for center-drilling stock before between-centers turning, countersinking for fastener seating, and spotting operations. The right-hand cutting direction suits conventional spindle rotation on the vast majority of production and job-shop equipment. It is installed by machinists and toolroom technicians working in metal fabrication, aerospace, automotive, and general manufacturing environments.

Key Features

• Solid carbide construction provides rigidity and heat resistance beyond high-speed steel equivalents
• AlTiN coating extends tool life in hardened steels, stainless, and high-temperature alloys
• 118-degree drill point angle with 120-degree included countersink angle in a single tool
• Double-end design allows the tool to be reversed when one end dulls, extending service life
• Trade Size 4 with 5/16-inch body diameter and 1/8-inch point diameter
• Right-hand cutting direction for use with standard clockwise spindle rotation

Compatibility

Designed as a standard Trade Size 4 combined drill and countersink for use in collet chucks, drill chucks, and tool holders accommodating a 5/16-inch body diameter on milling machines, lathes, and CNC machining centers.

Installation Notes

Installation and tool changes should be performed with the machine spindle fully stopped and power locked out. Secure the tool in a properly sized collet or drill chuck, ensuring adequate shank engagement before running at speed. Carbide tooling is brittle and should not be subjected to interrupted cuts or side loads beyond the tool geometry's design intent. Consult the machine manufacturer's recommended speeds and feeds for carbide center drills based on workpiece material.