Value Collection GH8790453 Counterbore 45/64in 3 Flute Hss

Product Description

The VALUE COLLECTION GH8790453 is a 3-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and mechanical assembly work. Built from high-speed steel with a bright, uncoated finish, this tool delivers consistent cutting performance in a wide range of ferrous and non-ferrous materials. The counterbore measures 45/64 inches in diameter with a 1/2-inch straight shank, making it compatible with standard drill press and milling machine spindles. Right-hand cutting direction is standard. This tool is used by machinists, tool-and-die workers, and maintenance technicians who require reliable, repeatable counterbore geometry.

This counterbore is suited for shop and field applications where bolt-head recessing or fastener seating is required. The interchangeable pilot design allows the operator to swap pilots to match different fastener or hole sizes without changing the body, improving workflow efficiency on production and repair jobs. With a 5-3/8-inch overall length and a 3-7/8-inch shank length, the tool provides adequate reach for standard-depth counterboring in plate, structural, and machined components. It is appropriate for use in manual or CNC drill presses and milling setups.

Key Features

• 45/64-inch counterbore diameter for precise bolt-head seating
• Interchangeable pilot accepts 1/4-inch pilot shank diameter
• 3-flute geometry promotes smooth chip evacuation and surface finish
• High-speed steel construction provides hardness and wear resistance across common workpiece materials
• Bright uncoated finish suited for general-purpose cutting without specialized coatings
• Right-hand cut, straight 1/2-inch shank fits standard toolholders

Compatibility

Designed as an OEM-style replacement and standard-fit interchangeable pilot counterbore for use with 1/2-inch straight shank toolholders and drill press spindles accepting a 1/4-inch pilot shank diameter.

Installation Notes

This tool is installed and operated by machinists and maintenance technicians using drill presses, milling machines, or similar equipment. Secure the straight shank firmly in the chuck or toolholder before operation, and verify the pilot is correctly seated and locked before beginning the cut. Power down and de-energize the machine before changing pilots or removing the tool. Always operate within the speed and feed parameters recommended for high-speed steel tooling in the workpiece material being cut.