Value Collection GH8792244 Counterbore 5 Flute Hss

Product Description

The VALUE COLLECTION GH8792244 is a 5-flute interchangeable pilot counterbore designed for precision enlarging and finishing of bolt-seat recesses in metal workpieces. Built from high speed steel with a bright, uncoated finish, this tool delivers consistent cutting performance in production and maintenance machining environments. The counterbore measures 2.375 inches in diameter with a 1.75-inch straight shank and a 9.875-inch overall length. Right-hand cutting geometry suits standard drill press and milling machine setups. The interchangeable pilot design accepts a 0.5-inch pilot shank, allowing the tool to be reused across different pilot sizes without replacing the entire body.

This counterbore is suited for machining operations that require a flat-bottomed recess to seat socket head cap screws, hex bolts, or similar fastener heads flush or below a workpiece surface. Typical applications include fabrication shops, aerospace maintenance facilities, and general metalworking operations where consistent recess depth and diameter are required. The 5-flute configuration reduces chatter and improves surface finish in ferrous and non-ferrous materials at moderate feed rates.

Key Features

• 2.375-inch counterbore diameter for large-fastener recess applications
• 5-flute design reduces chatter and improves finish quality
• High speed steel construction provides durability across ferrous and non-ferrous workpieces
• Interchangeable pilot accepts 0.5-inch pilot shank for flexible setup
• 1.75-inch straight shank compatible with standard collets and drill chucks
• Bright, uncoated finish allows visual wear monitoring during use

Compatibility

Designed as an OEM-style interchangeable pilot counterbore compatible with standard straight-shank toolholders and drill press chucks sized for a 1.75-inch shank diameter, accepting a 0.5-inch interchangeable pilot.

Installation Notes

Installation and use of this counterbore should be performed by a qualified machinist or tooling professional. Secure the straight shank firmly in a properly sized collet or drill chuck before operation, and verify pilot fit before engaging the workpiece. Power down and lock out the machine before changing pilots or inspecting the cutting edges. Do not exceed the spindle speed recommended for the workpiece material and tool diameter to avoid premature wear or tool breakage.