Value Collection GH8790123 Counterbore 3/16 in 3 Flute Hss

Product Description

The VALUE COLLECTION GH8790123 is a 3-flute interchangeable pilot counterbore designed for precision counterboring operations in metal and similar materials. It features a 3/16-inch counterbore diameter and a 15/64-inch straight shank, making it compatible with standard chucks and tool holders. Constructed from high speed steel with a bright, uncoated finish, this tool delivers reliable cutting performance in right-hand rotation. The overall length is 3 inches, with a shank length of 2-3/8 inches. It is installed and used by machinists and tool-and-die tradespeople working on drilling and countersinking applications where pilot interchangeability is required.

This counterbore is suited for shop and field applications where a 3/32-inch pilot shank diameter is needed. The interchangeable pilot design allows the operator to swap pilots for different fastener clearance requirements without replacing the body. Typical use cases include aerospace-adjacent fabrication, general metalworking, and mechanical assembly where a clean, flat-bottomed recess is required for socket head cap screws or similar fasteners.

Key Features

• 3/16-inch counterbore diameter for precise flat-bottomed recesses
• 3-flute geometry for smooth cutting and chip evacuation
• 15/64-inch straight shank fits standard drill chucks and holders
• High speed steel construction for durability across common workpiece materials
• Bright uncoated finish with polished surface for reduced friction
• Interchangeable pilot accepts 3/32-inch pilot shank diameter

Compatibility

Designed for use with interchangeable pilots with a 3/32-inch pilot shank diameter. Fits standard straight-shank tool holders and drill chucks accommodating a 15/64-inch shank.

Installation Notes

This tool is installed by machinists or qualified shop personnel using a drill press, milling machine, or hand drill with an appropriate chuck. Secure the straight shank firmly in the chuck before operation and confirm the correct pilot is seated before cutting. Always wear appropriate eye protection and secure the workpiece properly before engaging the tool. Follow applicable shop safety standards and machine manufacturer guidelines during setup and use.