Harvey Tool 849560-C3 Combo Drill Countersink Size 4

Product Description

The HARVEY TOOL 849560-C3 is a solid carbide combined drill and countersink designed for precision hole-starting and countersinking in a single operation. Built to trade size 4 with a 5/16-inch body diameter, it features an AlTiN coating that extends tool life in demanding materials by reducing heat buildup at the cutting edge. The 118-degree drill point angle and 100-degree included angle deliver accurate spot drilling and countersinking without tool changes. A right-hand cut and plain cutting edge style make it a straightforward choice for machinists and tool-and-die shops working in production or job-shop environments.

This combined drill and countersink is suited for use in machining centers, manual lathes, and drill presses where center drilling and countersinking must be performed efficiently in one pass. The double-end configuration extends usable tool life by providing two cutting ends per shank. With a 1/8-inch point diameter and 2-1/2-inch overall length, it fits standard toolholders used in both CNC and manual setups. Typical applications include center drilling for lathe work, countersinking for fastener seating, and spot drilling prior to twist drilling on metal workpieces.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• AlTiN coating reduces cutting temperatures and extends tool life
• Double-end design provides two usable cutting ends per tool
• 118-degree drill point angle for accurate center drilling and spot drilling
• 100-degree included angle for standard countersink profiles
• Right-hand cut with plain cutting edge style for conventional machining setups

Compatibility

Designed as an OEM-style replacement or standard tooling option for machining applications requiring a combined drill and countersink in trade size 4 with a 5/16-inch body diameter.

Installation Notes

Installation and use should be performed by qualified machinists or tool-and-die professionals. Secure the tool in a properly sized collet or chuck before operation, and verify runout is within acceptable limits before cutting. Power down and de-energize all equipment before changing or inspecting tooling. Do not exceed manufacturer-recommended speeds and feeds for the workpiece material and coating type.