Keo 906-000-231 Combo Drill Countersink Size 14 Cobalt

Product Description

The KEO 906-000-231 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single operation. Built from cobalt high-speed steel with a bright uncoated finish, it delivers solid performance in tough materials including stainless steel and heat-resistant alloys. The tool features a 5/16 inch body diameter, a 7/64 inch drill point diameter, and an included angle of 60 degrees for a standard countersink profile. With a bell-style cutting edge and right-hand cut orientation, it suits production and maintenance machining where consistent countersink geometry matters. Machinists and tool-and-die professionals are the primary installers of this type of cutting tool.

This combo drill countersink is used in metalworking applications where a pilot hole and countersink seat must be cut together. The double-end style allows the tool to be flipped and reused once one end dulls, extending service life. Typical use cases include aerospace-style fastener prep, sheet metal fabrication, and general machine shop work requiring a 60-degree countersink seat. The 2-1/8 inch overall length fits standard drill press chucks and CNC toolholders commonly found in job shop environments.

Key Features

• Cobalt construction for heat resistance and durability in hard materials
• Bell-style cutting edge produces a clean 60-degree countersink seat
• Double-end design doubles usable tool life before replacement
• Right-hand cut orientation for standard spindle operation
• Bright uncoated finish suits a wide range of cutting fluids and materials
• Non-tapered body with 5/16 inch diameter fits standard toolholding systems

Compatibility

Designed as an OEM-style cutting tool for use in drill presses, milling machines, and CNC machining centers accepting standard straight-shank toolholders sized for a 5/16 inch body diameter.

Installation Notes

This tool is installed and operated by machinists and CNC technicians. Secure the tool firmly in the chuck or collet before operation and verify runout before cutting. Always use appropriate cutting fluid for the workpiece material to prevent premature dulling of the cobalt cutting edges. Follow applicable shop safety procedures and machine guarding requirements during all cutting operations.