Keo 906-000-279 Combo Drill Countersink Size 20 Hss

Product Description

The KEO 906-000-279 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single operation. Built from high-speed steel with a bright, uncoated finish, this tool features a 1-inch body diameter, a 3/8-inch drill point diameter, and a 118-degree drill point angle. The bell-style cutting edge with a 60-degree included angle produces a clean, accurate countersink seat. With an overall length of 3-3/4 inches and a right-hand cutting direction, it is suited for use in manual or CNC machining setups where consistent countersink geometry is required.

This combination drill countersink is appropriate for metalworking, toolroom, and general machining applications. It is commonly used in production and maintenance environments where operators need to prepare fastener seat profiles in metal workpieces without changing tools. The double-end configuration provides extended tool life by offering two usable ends. Trade size 20 places this tool in a standard sizing series familiar to machinists and tool crib personnel.

Key Features

• High-speed steel construction for durability across a range of metalworking materials
• 118-degree drill point angle with 3/8-inch drill point diameter for accurate hole entry
• Bell-style cutting edge with 60-degree included angle for consistent countersink profile
• Double-end design extends usable tool life
• Bright, uncoated finish suitable for general-purpose machining applications
• Right-hand cut, non-tapered body with 1-inch body diameter

Compatibility

Designed as a standard trade size 20 combination drill countersink for use in metalworking and general machining operations requiring simultaneous drilling and countersinking.

Installation Notes

Installation and use of this tool should be performed by qualified machinists or tool operators familiar with cutting tool setup and machine operation. Secure the tool firmly in an appropriate chuck or collet before operation and verify spindle speed is set per the material and tool diameter being used. Inspect the cutting edges before each use and replace the tool or flip to the second end when wear is observed. Always follow applicable shop safety procedures and machine guarding requirements.