Value Collection GH8815276 Counterbore 27/64 in 3 Flute

Product Description

The VALUE COLLECTION GH8815276 is a 3-flute interchangeable pilot counterbore designed for precision recess cutting in metal fabrication and machining applications. Built from cobalt steel with a bright, uncoated finish, this counterbore delivers reliable cutting performance in hard and abrasive materials. The straight shank measures 3/8 inch in diameter and 3-1/16 inches in length, with an overall length of 4-1/16 inches. The 27/64-inch counterbore diameter and right-hand cutting direction make it a straightforward fit for standard counterboring operations requiring clean, consistent seat geometry.

This counterbore is suited for use in machine shops, maintenance facilities, and production environments where bolt-seat or fastener-recess operations are performed on steel, stainless, and other ferrous or hard materials. The interchangeable pilot design allows the pilot to be swapped to accommodate different clearance hole sizes, reducing tooling inventory without sacrificing precision. Compatible pilot shank diameter is 5/32 inch. It is appropriate for use in drill presses, milling machines, and similar machine tool setups.

Key Features

• Cobalt steel construction for extended tool life in hard and abrasive materials
• 27/64-inch counterbore diameter for accurate bolt-seat recessing
• 3-flute geometry for efficient chip evacuation and smooth finish
• Interchangeable pilot accepts 5/32-inch pilot shank diameter
• Straight shank for positive chuck retention in standard toolholders
• Bright, uncoated finish with polished flutes for reduced friction

Compatibility

Designed for use with 5/32-inch interchangeable pilots. Fits standard straight-shank toolholders and drill chucks accepting 3/8-inch shank diameters.

Installation Notes

Installation and operation should be performed by a qualified machinist or toolroom technician. Secure the straight shank firmly in a compatible chuck or toolholder before use, and verify the pilot is properly seated and locked before beginning the cut. Always ensure the workpiece is clamped securely and the machine spindle speed is appropriate for the material being cut. Do not exceed the tool's rated cutting capacity or use it in hand-held power tools.