Keo 906-000-105 Combo Drill Countersink Size 4 Hss

Product Description

The KEO 906-000-105 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single operation. Made from high-speed steel with a bright, uncoated finish, this tool features a 5/16 inch body diameter and a 1/8 inch drill point diameter. The 118-degree drill point angle suits general-purpose metalworking applications, while the 60-degree included angle delivers a clean countersink profile. At 2-1/8 inches overall length, the tool is compact and sized for bench drill presses, milling machines, and hand-held drill applications. It cuts right-hand and is built with a double end type for extended tool life. Machinists, tool-and-die workers, and fabricators are the primary installers.

This combo drill countersink is suited for use in metal fabrication, light manufacturing, and machine shop environments where precise countersinking is required prior to fastener seating. The trade size 4 designation and 1/8 inch point make it appropriate for small-diameter fastener prep work in ferrous and non-ferrous metals. The plain cutting edge style and non-tapered body allow straightforward setup in standard drill chucks. It is not designed for aircraft-style countersinking applications.

Key Features

• High-speed steel construction for durability across ferrous and non-ferrous materials
• 118-degree drill point angle for general-purpose center drilling and countersinking
• 60-degree included angle for standard countersink profile
• Double end type extends usable tool life
• Bright uncoated finish for easy visual inspection of cutting edge condition
• Right-hand cut compatible with standard drill press and lathe spindle rotation

Compatibility

Designed as an OEM-style replacement or standard tooling addition for drill presses, lathes, and milling machines accepting 5/16 inch body diameter combination drill countersinks in trade size 4.

Installation Notes

This tool is installed and operated by machinists or skilled fabricators using standard drill press or lathe equipment. Secure the tool firmly in a compatible drill chuck or collet before operation and verify spindle speed is appropriate for the workpiece material. Always bring the spindle to a complete stop before adjusting or removing the tool. Eye protection and appropriate workholding are required during use.