Keo 906-000-316 Combo Drill Countersink Size 4-1/2

Product Description

The KEO 906-000-316 is a combination drill and countersink tool designed to perform two operations in a single pass. It drills a pilot hole and forms the countersink seat simultaneously, reducing setup time and tool changes on the job. Built to a trade size of 4-1/2 with a bright, uncoated finish, this tool is suited for metalworking, fabrication, and general machining applications. The uncoated surface is appropriate for use on a wide range of workpiece materials and allows for easy visual inspection of the cutting edges. Machinists, fabricators, and maintenance technicians typically select this tool for high-volume drilling and fastener-seating operations.

This combo drill countersink is used in shop and field applications where a clean countersink seat is required for flat-head fasteners. The tool is appropriate for use in drill presses, lathes, and CNC machining centers. Trade size 4-1/2 fits standard toolholding systems and is a common selection for medium-range fastener work in metal fabrication, HVAC equipment assembly, and general mechanical maintenance settings.

Key Features

• Combination drill and countersink performs two operations in one pass
• Trade size 4-1/2 for medium-range fastener applications
• Bright, uncoated finish allows easy inspection of cutting edges
• Compatible with standard drill presses, lathes, and CNC toolholding systems
• Lightweight construction at 0.1 pounds

Compatibility

Designed as a standard trade-size combo drill countersink suitable for use in drill presses, lathes, and CNC machining centers that accept conventional straight-shank or center-drill tooling of this size class.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or fabricators following standard shop safety procedures. Ensure the workpiece is properly secured before operation and that the machine spindle is fully stopped before changing or adjusting the tool. Eye protection and appropriate cutting fluid use should follow shop standard practice and applicable OSHA guidelines. Inspect cutting edges before each use and remove from service if chipping or wear is observed.