Keo 906-000-119 Combo Drill Countersink Size 4 Hss Tin

Product Description

The KEO 906-000-119 is a combination drill and countersink designed to drill a pilot hole and cut a countersink in a single pass. Made from high-speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction on ferrous and non-ferrous materials. The body measures 5/16 inches in diameter with a 1/8-inch drill point diameter and a 90-degree included angle. Overall length is 2-1/8 inches. This tool is used by machinists, fabricators, and tool-and-die professionals working on precision drilling and countersinking operations.

This combo drill countersink is suited for trade size 4 applications in general machining, metal fabrication, and light industrial work. The right-hand cutting direction and plain cutting edge style make it compatible with standard drill presses, CNC machines, and hand-held rotary equipment. It performs countersinking operations for flat-head fastener seating on steel, aluminum, and similar materials. The double end type allows the tool to be used from both ends, extending usable tool life before replacement is needed.

Key Features

• High-speed steel construction with titanium nitride (TiN) coating for improved wear resistance
• 90-degree included angle for standard flat-head fastener countersinking
• Double-end design extends tool life by offering two usable cutting ends
• Right-hand cut with plain cutting edge style for consistent chip clearance
• Single-pass operation drills pilot hole and countersink simultaneously
• Compact 2-1/8-inch overall length suits benchtop and CNC setups

Compatibility

Designed as an OEM-style replacement or standard tooling option for trade size 4 combo drill countersink applications in general machining and metal fabrication setups.

Installation Notes

Installation is performed by machinists and fabricators using standard drill chucks on drill presses, milling machines, or CNC equipment. Secure the shank firmly in the chuck before operation and verify spindle speed is appropriate for the workpiece material and tool diameter. Do not exceed the tool's rated cutting speed for high-speed steel tooling. Inspect the cutting edges before each use and replace when wear is visible to maintain hole quality.