Keo 919-000-959 Countersink 5/8 in 90 Deg Solid Carbide

Product Description

The KEO 919-000-959 is a single-flute solid carbide countersink designed for chamfering, countersinking, and deburring operations in metalworking and machining applications. It features a 5/8 inch head diameter, a 90-degree included angle, and a 3/8 inch shank diameter, making it a compact and rigid tool suited for precision hole preparation. The solid carbide construction provides superior hardness and wear resistance compared to high-speed steel alternatives, allowing the tool to maintain cutting geometry longer under demanding conditions. Machinists and toolmakers install this countersink in drill presses, CNC machining centers, and hand-held drill applications where consistent chamfer quality is required.

This countersink is intended for use in production and job-shop machining environments where clean, accurate countersinks are needed on metal workpieces. The single-flute design reduces chatter and produces a smooth finish in materials where multi-flute tools may vibrate. With an overall length of 2.75 inches, it fits standard toolholders and collet chucks accepting a 3/8 inch shank. Typical applications include preparing holes for flat-head fasteners, deburring drilled holes, and creating lead-in chamfers on precision components.

Key Features

• Solid carbide construction for extended tool life and wear resistance
• 90-degree included angle for standard flat-head fastener countersinking
• Single-flute geometry minimizes chatter and produces smooth chamfer surfaces
• 5/8 inch maximum cutting diameter handles a wide range of fastener sizes
• 3/8 inch shank diameter compatible with common collets and toolholders
• Suitable for chamfering, countersinking, and deburring in a single tool

Compatibility

Designed as an OEM-style replacement or direct-use countersink for machine tool setups accepting a 3/8 inch round shank, including drill presses, machining centers, and CNC lathes performing chamfering and deburring operations.

Installation Notes

This tool is installed by machinists or toolroom technicians in a standard collet, drill chuck, or toolholder rated for a 3/8 inch shank. Ensure the machine spindle is fully stopped and the tool is secured with appropriate clamping torque before operation. Carbide tooling is brittle and should not be subjected to lateral shock or dropped on hard surfaces, as chipping may result. Follow shop safety practices and applicable machine guarding requirements during setup and use.