Keo 906-000-389 Combo Drill Countersink Metric Hss

Product Description

The KEO 906-000-389 is a metric combo drill countersink manufactured from high-speed steel with a bright, uncoated finish. It combines a drill point and a countersink in a single double-end tool, allowing machinists and fabricators to drill and countersink in one operation. The drill point measures 4.00 mm in diameter with a 120-degree point angle, while the body diameter is 10.00 mm. Overall length is 56.00 mm. The cutting edge uses a radius style geometry, and the included angle is 60 degrees. This tool is suited for production and job-shop environments where metric countersinking is performed on a regular basis.

This combo drill countersink is designed for countersinking applications in metric fastener work. The right-hand cut orientation makes it compatible with standard drill press and CNC spindle setups. The double-end configuration extends tool life by providing two usable ends before replacement is needed. It is commonly used in metalworking, light fabrication, and precision machining where clean, consistent countersink geometry is required on metric-dimensioned workpieces.

Key Features

• Double-end design provides two cutting ends for extended tool service life
• 120-degree drill point angle suited for metric countersink profiles
• High-speed steel construction handles a wide range of ferrous and non-ferrous materials
• Radius cutting edge style for smooth countersink entry and finish
• Bright uncoated finish for easy wear inspection during use
• Right-hand cut compatible with standard drill press and CNC spindle rotation

Compatibility

Designed as a direct-fit metric combo drill countersink for standard drill press chucks, CNC machining centers, and manual mill setups that accept 10.00 mm body diameter shank tooling with right-hand rotation.

Installation Notes

This tool is installed by machinists and toolroom technicians in drill press or CNC spindle holders rated for the body diameter. Secure the shank firmly in the chuck or collet before operation and verify spindle rotation is set to right-hand before engaging the workpiece. Always wear appropriate eye protection and secure the workpiece with a clamp or vise. Inspect both cutting ends for chipping or wear before each use.