Keo 906-000-052 Combo Drill Countersink 4/0 Hss

Product Description

The KEO 906-000-052 is a combination drill and countersink designed for precision pilot-hole drilling and countersinking in a single operation. Built from high-speed steel with a bright, uncoated finish, this aircraft-style tool features a 1/8-inch body diameter, a 118-degree drill point angle, and a 60-degree included angle. The double-end design extends tool life by providing two usable cutting ends. It is sized at trade size 4/0 with a 0.0150-inch drill point diameter and an overall length of 1.25 inches. Machinists, tool-and-die techs, and aerospace fabricators use this type of tool when close-tolerance countersinking is required before fastener seating.

This combo drill countersink is suited for light-material countersinking applications in both production and maintenance shop environments. The right-hand cut, radius cutting-edge style, and 5/64-inch radius length make it appropriate for work requiring smooth, consistent countersink profiles. Its compact 1.25-inch overall length fits standard drill press and CNC setups where short-reach tooling is needed. Aircraft-style geometry meets the fit requirements common in aerospace and precision sheet-metal work.

Key Features

• High-speed steel construction provides durability across a range of ferrous and non-ferrous workpiece materials
• 118-degree drill point angle suited for general-purpose drilling and countersinking in one pass
• Double-end design doubles usable tool life before replacement is needed
• Aircraft-style geometry meets close-tolerance countersink requirements
• Bright, uncoated finish for straightforward visual inspection of cutting edge condition
• 60-degree included angle with radius cutting-edge style for smooth countersink profiles

Compatibility

Designed as an OEM-style replacement or direct-use combo drill countersink for standard drill press, CNC, and hand-held drill setups accepting 1/8-inch body diameter tooling in trade size 4/0.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the tool is secured in a properly sized collet or chuck before beginning work. Do not exceed the recommended speed and feed parameters for the workpiece material and tool diameter. Inspect both cutting ends for wear or chipping before each use.