Keo 919-000-937 Countersink 1/2 in 82 Degree Solid Carbide

Product Description

The KEO 919-000-937 is a single-flute solid carbide countersink designed for precision chamfering, countersinking, and deburring operations in metalworking and machining environments. With a 1/2-inch head diameter and an 82-degree included angle, this tool produces clean, consistent countersunk profiles suited to standard flathead fastener seating. The solid carbide construction delivers superior hardness and wear resistance compared to HSS alternatives, making it well suited for production runs on harder workpiece materials. The 1/4-inch shank fits common drill chucks and quick-change toolholders. Installed by machinists, tool-and-die professionals, and maintenance technicians.

This countersink is appropriate for use on CNC machining centers, drill presses, and hand-held power tools wherever a 1/4-inch shank is accepted. The single-flute design limits chatter and promotes smooth entry, particularly in interrupted cuts or thin-walled workpieces. Typical applications include aerospace, automotive, and general fabrication shops requiring precise countersunk holes for flathead machine screws. The 82-degree angle matches the standard flathead screw geometry common in North American fastener specifications.

Key Features

• Solid carbide construction for extended tool life on hardened and abrasive materials
• 82-degree included angle matches standard flathead fastener countersink geometry
• Single-flute design reduces chatter and promotes smooth cutting action
• 1/2-inch maximum cutting diameter accommodates common fastener sizes
• 1/4-inch shank diameter compatible with standard drill chucks and toolholders
• Suitable for chamfering, countersinking, and deburring in a single tool

Compatibility

Designed as an OEM-style replacement or direct-fit countersink for drill presses, CNC machining centers, and hand-held power tools accepting a 1/4-inch round shank.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians. Secure the 1/4-inch shank firmly in the chuck or toolholder before operation and verify runout before engaging the workpiece. Power down and de-energize the machine spindle completely before changing or inspecting the tool. Carbide tooling is brittle - avoid side-loading or dropping the tool, as chipping or fracture can result.