Value Collection GH8815342 Counterbore 17/32 in 3 Flute

Product Description

The VALUE COLLECTION GH8815342 is a 3-flute interchangeable pilot counterbore designed for precision counterboring operations in metal fabrication and machining applications. Built from cobalt steel with a bright, uncoated finish, this tool delivers solid performance in harder materials where high-speed steel would wear prematurely. The straight shank measures 1/2 inch in diameter and 3-1/16 inches in length, with an overall length of 4-5/16 inches. The counterbore diameter is 17/32 inches, and the interchangeable pilot accepts a 3/16-inch pilot shank diameter. Right-hand cutting direction is standard. Machinists and tool-and-die professionals reach for cobalt-construction counterbores when working stainless, alloy steels, and other abrasion-resistant materials.

This counterbore is suited for use in manual mills, drill presses, and CNC machining centers where a standard counterbore seat is required ahead of a fastener head. The interchangeable pilot design allows the pilot to be swapped out independently of the body, reducing tooling cost when only the pilot wears. Typical applications include aerospace-adjacent fabrication, structural steel work, and general machine shop use where socket head cap screw clearance bores or stepped hole features are needed.

Key Features

• Cobalt steel construction for improved wear resistance in hard and abrasion-resistant workpiece materials
• 3-flute geometry provides balanced cutting action and good chip evacuation
• Interchangeable pilot accepts a 3/16-inch pilot shank for flexible pilot replacement without replacing the full body
• Bright, uncoated finish allows direct visual inspection of the cutting edges
• Straight 1/2-inch shank for compatibility with standard drill chucks and collet holders
• Right-hand cutting direction matches standard spindle rotation on most machines

Compatibility

Designed for use with standard straight-shank tool holders, drill chucks, and collet systems accepting a 1/2-inch shank. Pilot compatibility requires a 3/16-inch interchangeable pilot.

Installation Notes

Installation and use should be performed by a qualified machinist following standard shop safety practices. Secure the straight shank firmly in a drill chuck or collet to the full recommended engagement depth before operation. Ensure the pilot is properly seated and locked before initiating the cut. Power down the machine and confirm the spindle has stopped completely before changing pilots or inspecting cutting edges.