Keo 906-000-258 Combo Drill Countersink Size 17 Cobalt

Product Description

The KEO 906-000-258 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, this tool handles tough materials including stainless steel and other hard alloys. It features a 118-degree drill point angle, a 7/32-inch point diameter, and a 60-degree included angle on the bell countersink. The double-end design delivers extended tool life by providing two usable cutting ends. Right-hand cut geometry suits standard drill presses and CNC machining centers. This tool is used by machinists, maintenance technicians, and fabricators working in metal fabrication and precision machining environments.

This combo drill countersink is suited for countersinking applications requiring a bell-style cutting edge on ferrous and non-ferrous metals. The cobalt construction makes it appropriate for harder workpiece materials where standard high-speed steel tools wear prematurely. At 3-1/4 inches overall length with a 5/8-inch body diameter, it fits standard drill chucks and collet holders used in shop and field maintenance settings. The 7/32-inch point length provides adequate penetration depth for typical countersink prep work before fastener seating.

Key Features

• Cobalt high-speed steel construction for use in hard and abrasive materials
• 118-degree drill point angle for standard metal drilling
• 60-degree included angle bell countersink for precise seat formation
• Double-end design extends usable tool life
• Right-hand cut compatible with standard drill presses and machining centers
• Bright uncoated finish for easy inspection of cutting edge condition

Compatibility

Designed as an OEM-style replacement or direct-use combo drill countersink for standard drill press chucks and collet holders accepting a 5/8-inch body diameter shank in metalworking and fabrication applications.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or maintenance professionals familiar with rotating cutting tools. Secure the tool firmly in the chuck or collet before operation and verify runout before cutting. Always power down and lock out the machine before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed recommendations based on workpiece material.