Value Collection GH8790503 Counterbore 25/32in 3 Flute Hss

Product Description

The VALUE COLLECTION GH8790503 is an interchangeable pilot counterbore designed for precision recess cutting in metal fabrication and machining applications. Built from high-speed steel with a bright, uncoated finish, it delivers consistent cutting performance across a range of shop and production environments. The tool features a 25/32-inch counterbore diameter, a 5/8-inch straight shank, and 3 right-hand cutting flutes for smooth material removal. With an overall length of 5-3/8 inches and a shank length of 3-7/8 inches, it fits standard drill press and milling setups. Licensed machinists and toolroom technicians are the primary users of this style of counterbore.

This counterbore is suited for right-hand cutting operations requiring a 25/32-inch seat diameter, commonly encountered when recessing fastener heads in steel, aluminum, and similar machinable materials. The interchangeable pilot design accepts a 1/4-inch pilot shank, allowing the operator to swap pilots without changing the body — a practical advantage in shops running multiple fastener sizes. It is appropriate for both manual machine operation and light CNC setup work where controlled feed rates are maintained.

Key Features

• 25/32-inch counterbore diameter for precise fastener seat recessing
• High-speed steel construction for durability across common machinable metals
• 3 right-hand cutting flutes for efficient chip evacuation and smooth finish
• Interchangeable pilot design accepts 1/4-inch pilot shank for flexible operation
• 5/8-inch straight shank fits standard drill press and milling machine chucks
• Bright uncoated finish — no coating to chip or flake during high-speed operation

Compatibility

Designed as an OEM-style replacement or direct-use interchangeable pilot counterbore compatible with 1/4-inch pilot shanks on standard drill press, milling machine, and similar machining equipment setups.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians using standard chuck tooling. Always secure the workpiece firmly and power down the machine before changing pilots or adjusting tooling. Use appropriate cutting fluid for the material being machined to extend tool life and improve surface finish. Follow machine manufacturer feed and speed guidelines for high-speed steel tooling.