Keo 906-000-313 Combo Drill Countersink 4-1/2 Hss

Product Description

The KEO 906-000-313 is a combination drill and countersink designed for precision drilling and countersinking in a single operation. Built from high-speed steel with a bright, uncoated finish, this tool handles both the pilot hole and the chamfer simultaneously, reducing tool changes and setup time. It features a 118-degree drill point angle and a 60-degree included angle for the countersink, a 3/8-inch body diameter, a 9/64-inch drill point diameter, and an overall length of 2.5 inches. Intended for machinists, tool and die workers, and production shop personnel working with metal fabrication and assembly applications.

This combo drill countersink is suited for creating chamfered holes that accept flat-head fasteners or for deburring and spot-facing operations on metal workpieces. The right-hand cutting direction and plain cutting edge style make it compatible with standard drill presses, CNC machining centers, and hand-held drilling equipment. The double-end configuration extends tool life by providing two usable cutting ends.

Key Features

• Combination drill and countersink removes need for separate tool changes during chamfering operations
• High-speed steel construction provides durability across a range of metal materials
• Bright, uncoated finish suits general-purpose metal drilling and countersinking
• 118-degree drill point angle with 60-degree included countersink angle
• Double-end design extends usable tool life
• Right-hand cut compatible with standard drill presses and CNC equipment

Compatibility

Designed as an OEM-style replacement or standard trade-size combo drill countersink for use in drill presses, CNC machining centers, and hand-held drilling setups requiring a Trade Size 4-1/2 combination tool.

Installation Notes

Installation and use should be performed by qualified machinists or tool operators familiar with rotating cutting tools. Secure the workpiece firmly before operation and verify that the tool shank is fully seated and clamped in the chuck or collet before starting the machine. Always operate within the recommended RPM range for the tool diameter and workpiece material. Wear appropriate eye protection and follow applicable shop safety standards when using high-speed cutting tools.