Keo 906-000-308 Combo Drill Countersink 1/4 Inch Hss Ticn

Product Description

The KEO 906-000-308 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single pass. Built from high-speed steel with a TiCN (titanium carbonitride) coating, this tool delivers improved hardness and wear resistance compared to uncoated HSS tooling. It features a 1/4-inch trade size, a 1/4-inch body diameter, an 82-degree included angle, and an overall length of 2 inches. The right-hand cutting direction and plain cutting edge style make it a straightforward drop-in for standard drill press and CNC setups. Machinists and fabricators working with steel, aluminum, and similar materials will find this tool well suited for production countersinking tasks.

This combo drill countersink is used in metalworking and fabrication environments where flush-mount fastener seating is required. The 33/64-inch drill point length and 1-inch shank length suit it to light-duty to medium-duty bench and machine operations. It is a single-end tool with a non-tapered, non-insertable design, making setup straightforward. Typical applications include countersinking for flat-head screws and rivets in sheet metal, structural steel, and aluminum plate work found in HVAC equipment fabrication, electrical enclosure manufacturing, and general mechanical assembly.

Key Features

• High-speed steel construction with TiCN coating for extended tool life and reduced wear
• 82-degree included angle for standard flat-head fastener countersinks
• 1/4-inch body diameter with 1/4-inch trade size for common tooling setups
• 33/64-inch drill point length allows controlled depth in thin to medium stock
• Right-hand cut, plain cutting edge, single-end design for straightforward use
• Non-tapered, non-insertable build for consistent, repeatable results

Compatibility

Designed as a standard 1/4-inch combo drill countersink suitable for use in drill presses, CNC machining centers, and manual lathes that accept straight-shank tooling in 1/4-inch trade sizes.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or fabricators familiar with rotating cutting tools. Secure the shank firmly in the toolholder and confirm runout is within acceptable limits before operation. Always power down and lock out the machine before changing or inspecting tooling. Use appropriate cutting fluid for the workpiece material to maximize tool life and surface finish quality.