Keo 919-000-225 Countersink 5/8 in 90 Deg Cobalt Steel

Product Description

The KEO 919-000-225 is a single-end cobalt steel countersink designed for countersinking and deburring operations in light-material applications. It features a 5/8-inch head diameter, a 90-degree included angle (45-degree centerline angle), and a straight-cylindrical 3/8-inch shank for secure chuck mounting. The cobalt steel construction provides heat resistance and edge retention during higher-speed cutting passes. This tool is intended for use by machinists, fabricators, and tool-and-die professionals working on production or maintenance drilling setups.

This countersink is suited for use on aluminum, non-metallic materials, and plastics where a clean, accurately angled seat is required. The right-hand cutting direction is compatible with standard drill press, CNC, and handheld power tool setups. Its cutting diameter range of 11/64 inches to 37/64 inches makes it applicable across a variety of fastener head sizes commonly encountered in light manufacturing and assembly work. No pilot is included, so the operator centers the tool over a pre-drilled hole before engagement.

Key Features

• Cobalt steel construction for improved heat resistance and tool longevity
• 90-degree included angle suits standard flat-head fastener countersink profiles
• Cutting diameter range: 11/64 inches to 37/64 inches
• 3/8-inch straight-cylindrical shank fits standard drill chucks
• Right-hand cut compatible with conventional drill press and CNC spindle rotation
• Rated for countersinking and deburring in aluminum, plastics, and non-metallic materials

Compatibility

Designed for countersinking and deburring applications in aluminum, non-metallic materials, and plastics. Fits any drill press, CNC machine, or handheld power tool equipped with a chuck accepting a 3/8-inch straight-cylindrical shank.

Installation Notes

This tool is installed by machinists or fabricators into any chuck compatible with a 3/8-inch straight-cylindrical shank. Always ensure the workpiece is securely clamped and the spindle is at a full stop before mounting or removing the countersink. No pilot is included, so the tool should be centered over a pre-drilled pilot hole to ensure accurate seating. Operate at speeds appropriate for the material being cut per the tooling manufacturer guidelines.