Keo 919-000-333 Countersink Set 7 Pc 6 Flute Hss

Product Description

The KEO 919-000-333 is a 7-piece countersink set designed for right-hand countersinking operations in metal, wood, and composite materials. Each countersink in the set features 6 flutes and a 60-degree included angle, producing clean, burr-free seats for flat-head fasteners. The tools are manufactured from high-speed steel with a bright, uncoated finish. Head diameters range from 1/4 inch to 1 inch, giving technicians and machinists a complete range of sizes for most standard countersinking tasks. Shanks are straight for use in standard drill chucks and countersink holders. The full set weighs 0.8 pounds and stores in a plastic case.

This set is suited for machine shops, maintenance facilities, fabrication shops, and field service work where multiple countersink sizes are needed in a single kit. The 60-degree angle is a common standard for flat-head machine screws and sheet metal fasteners. The range from 1/4 inch to 1 inch head diameter covers the most frequently encountered fastener sizes in light to medium industrial applications. The plastic storage case keeps all 7 pieces organized and protected between uses.

Key Features

• 7-piece set with head diameters from 1/4 inch to 1 inch
• 6-flute geometry for smooth, chatter-resistant cutting
• 60-degree included angle matches standard flat-head fastener geometry
• High-speed steel construction for durability across common workpiece materials
• Straight shank fits standard drill chucks and countersink holders
• Right-hand cutting direction; single-end design
• Includes plastic storage case for organization and transport

Compatibility

Designed as a standard straight-shank countersink set compatible with drill presses, hand drills, and milling machine setups that accept straight-shank tooling. Suitable for countersinking flat-head fastener seats in metal, wood, and composite workpieces requiring a 60-degree seat angle.

Installation Notes

Countersinks should be installed by a machinist or trained technician familiar with cutting tool safety. Secure the shank firmly in the chuck before operation and ensure the workpiece is clamped or fixtured to prevent movement. Run at appropriate spindle speeds for the workpiece material and tool diameter - consult published HSS cutting speed tables for guidance. Inspect cutting edges before each use and replace any tool showing chipping or excessive wear.