Keo 919-000-955 Countersink 3/8 in 90 Degree Solid Carbide

Product Description

The KEO 919-000-955 is a single-flute solid carbide countersink designed for precision chamfering, countersinking, and deburring operations in metalworking and machining applications. It features a 3/8 inch head diameter, a 90-degree included angle, and a 1/4 inch shank diameter, making it a compact and rigid tool suited for CNC machining centers, drill presses, and manual milling setups. The solid carbide construction provides superior wear resistance and cutting performance compared to HSS alternatives, particularly in harder workpiece materials. Overall length is 2.625 inches, keeping the tool profile short for improved rigidity and reduced runout during operation.

This countersink is used in light to medium-duty machining environments where clean, consistent chamfers and countersunk holes are required. Typical applications include preparing fastener seats, deburring through-holes, and chamfering part edges on ferrous and non-ferrous materials. The single-flute design helps reduce chatter and produces a smooth finish in a variety of materials. It is installed by machinists and toolroom technicians working in job shops, production facilities, and maintenance environments.

Key Features

• Solid carbide construction for extended tool life and heat resistance
• 90-degree included angle for standard fastener countersinking and chamfering
• Single-flute design reduces chatter and improves surface finish
• 3/8 inch head diameter with 1/4 inch shank for broad machine compatibility
• Compact 2.625 inch overall length improves rigidity and minimizes runout
• Suitable for chamfering, countersinking, and deburring in a single tool

Compatibility

Designed as a direct-fit replacement or standard tooling option for any machine spindle or collet chuck accepting a 1/4 inch round shank, including CNC machining centers, drill presses, and milling machines.

Installation Notes

This tool is installed by machinists or toolroom technicians into a collet, end mill holder, or drill chuck rated for the 1/4 inch shank diameter. Ensure the machine spindle is fully powered down and locked out before changing tooling. Secure the shank with sufficient clamping engagement to prevent slippage during cutting. Verify spindle speed and feed rate are appropriate for the workpiece material and tool diameter before initiating a cut.