Keo 906-000-385 Combo Drill Countersink Metric Hss

Product Description

The KEO 906-000-385 is a combination drill and countersink designed for metric applications in high-speed steel (HSS) construction with a bright, uncoated finish. This double-end tool performs drilling and countersinking in a single pass, reducing tool changes and setup time on the bench or machine. It features a 120-degree drill point angle and a 60-degree included angle with a radius cutting edge style, making it suitable for deburring, chamfering, and countersinking operations on metal workpieces. Right-hand cutting direction is standard. The tool weighs approximately 0.1 pounds and is not aircraft-style or long-length configuration.

This combo drill countersink is intended for use in metalworking and machining environments where metric tooling is required. The double-end design extends usable tool life. With a body diameter of 4.00 mm, a drill point diameter of 1.60 mm, and an overall length of 35.50 mm, it fits standard toolholders used in drill presses, lathes, and CNC setups. Machinists, tool-and-die workers, and general metalworking professionals are the primary installers and users of this tool type.

Key Features

• Double-end design for extended tool life and fewer changeovers
• High-speed steel construction for durability across common metalworking materials
• Bright, uncoated finish suitable for general-purpose countersinking
• 120-degree drill point angle with 60-degree included angle
• Radius cutting edge style for smooth countersink profile
• Right-hand cutting direction, standard machine compatibility

Compatibility

Designed as a general-purpose metric combo drill countersink suitable for use in standard drill presses, lathes, and CNC machining centers that accept toolholders sized for 4.00 mm body diameter tools.

Installation Notes

This tool is installed and operated by machinists and metalworking professionals. Secure the tool firmly in a compatible toolholder or chuck before operation and verify spindle speed is appropriate for the workpiece material and tool diameter. Always power down the machine completely before inserting or removing the tool. Do not exceed the tool's rated cutting parameters for the workpiece material to avoid tool breakage or workpiece damage.