Keo 906-000-106 Combo Drill Countersink Size 4 Hss Tin

Product Description

The KEO 906-000-106 is a combination drill and countersink designed to perform both operations in a single pass. Built from high-speed steel with a titanium nitride (TiN) finish, it delivers improved surface hardness and extended tool life compared to uncoated HSS tooling. The body diameter measures 5/16 inches, the drill point diameter is 1/8 inch, and the overall length is 2-1/8 inches. The 118-degree drill point angle suits general-purpose drilling in a wide range of materials. Right-hand cutting with a plain cutting edge, this tool is used by machinists, fabricators, and maintenance technicians in metalworking and production environments.

This combo drill countersink is suited for applications requiring a countersunk seat for flat-head fasteners or center-drilling operations on metal workpieces. The 60-degree included angle on the countersink portion prepares holes for standard flat-head screws and machine fasteners. The size 4 trade designation places it in common use for light production work and general metal fabrication. The double end type extends usable tool life. It is a non-tapered, non-aircraft-style tool appropriate for standard bench or machine use.

Key Features

• High-speed steel construction with titanium nitride (TiN) coating for improved wear resistance
• 118-degree drill point angle for general-purpose metal drilling
• 60-degree included angle countersink for standard flat-head fastener seats
• Right-hand cut with plain cutting edge
• Double end design extends service life before replacement
• 5/16 inch body diameter with 1/8 inch drill point diameter and 2-1/8 inch overall length

Compatibility

Designed as a standard size 4 combination drill countersink for use in manual or CNC machine setups requiring simultaneous center drilling and countersinking on metal workpieces.

Installation Notes

This tool is installed and operated by machinists or fabricators using a drill press, lathe, or milling machine. Ensure the spindle and workpiece are securely held before beginning operation. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Inspect the cutting edges for wear before each use and replace when chipping or dulling is observed.