Keo 919-000-242 Countersink 5/8 in Cobalt Steel

Product Description

The KEO 919-000-242 is a single-end cobalt steel countersink designed for countersinking and deburring operations in aluminum, plastics, and non-metallic materials. It features a 5/8 inch head diameter and a 100-degree included angle, making it suited for standard countersink profiles. The straight-cylindrical shank measures 3/8 inch in diameter, providing secure chuck retention in handheld drills and drill presses. Cutting diameter range spans 11/64 inch to 37/64 inch. The right-hand cutting direction is standard for conventional CNC and manual drilling setups. This tool does not include a pilot and is sold as a single countersink head with no bundled accessories.

The 919-000-242 is used in light machining, fabrication, and assembly environments where countersinking of screw seats or edge deburring is required on softer base materials. Typical applications include sheet metal work with aluminum stock, plastic enclosures, and non-metallic panels. It is well suited for machine shops, production lines, and maintenance technicians working with drill presses or hand drills requiring a reliable straight-shank countersink without a pilot guide.

Key Features

• 5/8 inch head diameter with 100-degree included angle for standard countersink profiles
• Cobalt steel construction for improved hardness and heat resistance over standard HSS
• Cutting diameter range: 11/64 inch to 37/64 inch
• 3/8 inch straight-cylindrical shank for broad chuck compatibility
• Right-hand cutting direction for use with conventional drill rotation
• Single-end design; no pilot included for streamlined countersinking and deburring

Compatibility

Designed for countersinking and deburring applications in aluminum, non-metallic materials, and plastics using standard drill presses or handheld drills with a chuck accommodating a 3/8 inch straight-cylindrical shank.

Installation Notes

This countersink is installed and operated by machinists and fabrication technicians. Secure the 3/8 inch straight shank firmly in the drill chuck before operation. Set spindle speed appropriate to the base material and tool diameter before engaging the workpiece. Always power down the drill or press completely before changing or inspecting the tool.