Value Collection 28631 Countersink 7/8in 82 Deg 6 Flute Hss

Product Description

The VALUE COLLECTION 28631 is a 6-flute high speed steel countersink designed for creating clean, chamfered seat profiles in metal, wood, and composite materials. With a 7/8 inch head diameter and an 82-degree included angle, this tool produces the precise conical recess needed for flat-head fasteners to sit flush with or below a workpiece surface. The 1/2 inch shank diameter provides secure grip in standard drill chucks and milling machine collets. High speed steel construction delivers the hardness and heat resistance required for production drilling and general fabrication work.

This countersink is suited for use in machine shops, fabrication facilities, and maintenance operations where consistent, accurate countersinking is required. The 82-degree included angle matches the seating angle of standard flat-head machine screws and bolts commonly used in metalworking and sheet metal applications. It is appropriate for use in drill presses, milling machines, and hand-held power drills with a 1/2 inch chuck capacity.

Key Features

• 7/8 inch head diameter for a wide chamfer footprint on standard and oversized fastener heads
• 82-degree included angle matches flat-head fastener seating geometry
• 6 flutes for smooth cutting action and reduced chatter
• High speed steel construction for durability in metal and composite materials
• 1/2 inch shank diameter fits standard drill chucks and collets

Compatibility

Designed as a general-purpose countersink for use with standard 1/2 inch drill chucks, drill presses, and milling machine setups requiring an 82-degree countersink profile.

Installation Notes

This tool is installed and operated by machinists, fabricators, and maintenance technicians. Secure the shank firmly in the chuck or collet before use and confirm the workpiece is clamped to prevent movement. Run at appropriate spindle speeds for the material being cut — lower speeds are recommended for harder metals to extend tool life. Wear appropriate eye protection during operation.