Keo 919-000-250 Countersink Set 4 Pc Cobalt Steel

Product Description

The KEO 919-000-250 is a 4-piece cobalt steel countersink set covering a head diameter range of 5/16 inches to 5/8 inches with a fixed 100-degree included angle. Each tool features a straight shank and a single-end, right-hand cutting design. Shank diameters run from 1/4 inches to 3/8 inches, and overall lengths range from 1-5/8 inches to 2-1/8 inches. The bright, uncoated finish is standard for cobalt steel tooling used in general metalworking and fabrication. Machinists, tool and die workers, and maintenance technicians reach for this set when they need consistent countersink geometry across a range of fastener sizes.

This set is suited for countersinking operations in metal fabrication shops, maintenance repair facilities, and production environments. The cobalt steel construction handles harder workpiece materials that would wear out standard high-speed steel tooling more quickly. Each countersink cuts right-hand and covers a cutting diameter range of 3/32 inches to 37/64 inches, making the set practical for a wide span of screw and bolt head seating requirements. The set stores in an included plastic case for organized bench or toolbox storage.

Key Features

• 4-piece set covering 5/16 to 5/8 inches head diameter in a single case
• 100-degree included angle for standard fastener head seating
• Cobalt steel construction for improved wear resistance on harder materials
• Straight shank design compatible with standard drill chucks
• Right-hand, single-end cutting geometry
• Bright uncoated finish; no coating degradation to manage during regrinding

Compatibility

Designed for use in standard drill presses, CNC machining centers, and hand drills with chucks accepting 1/4 inch to 3/8 inch straight shanks. Suitable for countersinking operations on metal and other materials requiring a 100-degree seat angle.

Installation Notes

Secure the countersink in a properly sized chuck and verify the shank is fully seated before operation. Power down and de-energize any machine tool before changing tooling. Use appropriate cutting fluid for the workpiece material to extend tool life. Follow applicable shop safety standards and machine guarding requirements during use.