Keo 906-000-177 Combo Drill Countersink Size 8 Hss Tin

Product Description

The KEO 906-000-177 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single pass. Built from high-speed steel with a titanium nitride coating, it delivers extended tool life in production and maintenance drilling applications. The 82-degree included angle is sized for standard flat-head fastener seating. With a 5/16-inch drill point diameter, a 3/4-inch body diameter, and a 3-1/2-inch overall length, this tool handles typical countersinking tasks in metal fabrication, HVAC sheet metal work, and light structural assembly. Right-hand cut geometry is standard for conventional drilling setups.

This combination tool is suited for use in drill presses, CNC machines, and handheld drilling equipment where countersinking to an 82-degree angle is required. The double end-type design and plain cutting edge make it a practical choice for shops and field technicians working with ferrous and non-ferrous metals. HVAC fabricators, pipefitters, and maintenance mechanics who regularly seat flat-head machine screws will find this tool fits standard production workflows. Size 8 trade designation corresponds to common fastener sizing used across mechanical and sheet metal trades.

Key Features

• High-speed steel construction with titanium nitride finish for extended wear resistance
• 82-degree included angle for standard flat-head countersink geometry
• 5/16-inch drill point diameter with 5/16-inch point length for precise entry
• 118-degree drill point angle for clean penetration in metal substrates
• Right-hand cutting direction compatible with standard drill equipment
• Double end-type design for versatile shop and field use

Compatibility

Designed as a standard Size 8 combination drill countersink for use with conventional drill presses, CNC equipment, and handheld drills accepting 3/4-inch body tooling.

Installation Notes

This tool is installed by machinists, HVAC sheet metal workers, and maintenance mechanics using standard drill chucks or collet holders. Ensure the drill chuck or collet is properly secured and the workpiece is clamped before operation. Use appropriate cutting fluid for ferrous metals to maintain tool life. Follow shop-specific speed and feed guidelines for high-speed steel tooling when setting up drill press or CNC parameters.