Keo 919-000-364 Countersink 2 in 82 Degree 6 Flute Hss

Product Description

The KEO 919-000-364 is a multi-flute countersink designed for enlarging and finishing conical holes in metal and similar materials. Built from high-speed steel (HSS), this tool delivers consistent cutting performance across a range of production and maintenance applications. The 2-inch head diameter and 82-degree included angle (41-degree centerline angle) make it well suited for standard flat-head fastener seat preparation. The straight-cylindrical shank measures 3/4 inch in diameter and 1-1/4 inches in length, providing secure chuck retention. With 6 flutes and a right-hand cutting direction, it produces a smooth, chatter-reduced finish on the countersunk surface.

This countersink is intended for use in machine shop, manufacturing, and maintenance environments where precise fastener seating is required. It is typically run in a drill press, milling machine, or lathe setup. The 82-degree angle matches the standard specification for flat-head machine screws and similar fasteners, making it a practical choice for metalworking, fabrication, and repair operations where a clean, accurate countersink profile is needed.

Key Features

• 2-inch head diameter for large-diameter countersink applications
• 82-degree included angle sized for standard flat-head fastener seating
• 6 flutes for reduced chatter and improved surface finish
• High-speed steel construction for durability across common metalworking materials
• 3/4-inch straight-cylindrical shank for standard chuck or collet mounting
• Right-hand cutting direction for use with conventional machine rotation

Compatibility

Designed as an OEM-style replacement or direct-use countersink for metalworking operations requiring an 82-degree, 2-inch head diameter tool with a 3/4-inch straight shank.

Installation Notes

This tool is installed by machinists and toolmakers into a drill press, mill, or lathe using a chuck or collet sized for a 3/4-inch shank. Ensure the machine is fully stopped and de-energized before mounting or removing the tool. Use appropriate speeds and feeds for the workpiece material to avoid overheating the HSS cutting edges. Do not use in hand-held drills where lateral loading may damage the shank or compromise hole accuracy.