Keo 917-000-033 Countersink 1/4 in 82 Degree 3 Flute Hss

Product Description

The KEO 917-000-033 is a single-end high-speed steel countersink designed for creating conical recesses in metal, wood, and composite materials. Built with three flutes and an 82-degree included angle, it produces clean, accurate countersinks for flat-head fastener seating. The straight-cylindrical shank measures 1/4 inch in diameter, matching the 1/4-inch head diameter. This tool is intended for use in drill presses, hand drills, and milling setups. It cuts in a right-hand direction and does not include a pilot. Machinists, fabricators, and metalworkers rely on this type of countersink for production and maintenance applications where precise fastener flush-mounting is required.

The 917-000-033 is suited for countersinking operations on ferrous and non-ferrous metals as well as plastics. The 82-degree included angle aligns with the standard angle used for most flat-head machine screws and bolts in North American applications. The straight shank allows direct chucking in standard drill chucks without adapters. It is commonly used in sheet metal work, structural fabrication, and general machine shop environments where consistent countersink geometry is critical.

Key Features

• 82-degree included angle for standard flat-head fastener compatibility
• Three flutes for smooth cutting action and chip clearance
• High-speed steel construction for durability across a range of workpiece materials
• 1/4-inch straight-cylindrical shank for direct chuck mounting
• Right-hand cutting direction for use with standard drill rotation
• Single-end design with no pilot for maximum versatility in setup

Compatibility

Designed as a standard single-end countersink compatible with any drill press, hand drill, or milling machine equipped with a chuck accepting a 1/4-inch straight shank.

Installation Notes

Secure the straight shank firmly in a drill chuck before operation and verify chuck key is removed prior to powering the machine. Use appropriate spindle speeds for the workpiece material - harder metals require lower RPM to prevent heat buildup and premature tool wear. Wear appropriate eye protection and secure the workpiece to prevent movement during cutting. Inspect the cutting edges before each use and replace the tool if chipping or wear is evident.