Weldon 97604-00-W Solid Pilot Counterbore Hss 13/32 in

Product Description

The WELDON 97604-00-W is a solid pilot counterbore designed for precision enlarging and finishing of existing holes to accept fastener heads at a consistent depth and seating surface. Built from high speed steel, this tool delivers reliable performance in metal fabrication, machining, and general holemaking applications. It features a 13/32-inch cutting diameter, a 17/64-inch pilot diameter, and a 2-flute geometry that promotes clean chip evacuation and smooth cutting action. The 1/4-inch shank diameter fits standard tool holders and drill chucks used in machine shop and production environments. Licensed machinists and tooling specialists are the primary users of this type of counterbore.

This counterbore is sized to work with 1/4-inch socket-head cap screws, making it a common choice for applications that require recessed fastener seating in steel, aluminum, and similar workpiece materials. With an overall length of 3.5 inches and a 1/4-inch shank, it fits typical drill presses, milling machines, and CNC machining centers. The solid pilot design provides precise hole alignment and reduces chatter during the counterboring operation. It is well suited for production runs and maintenance machining tasks where consistent fastener seat geometry is required.

Key Features

• 13/32-inch cutting diameter for socket-head cap screw seating
• 17/64-inch solid pilot for accurate hole alignment and reduced chatter
• 2-flute geometry promotes clean chip removal and smooth cutting
• High speed steel construction provides durability in ferrous and non-ferrous materials
• 1/4-inch socket-head cap screw compatible sizing
• 3.5-inch overall length suits standard machine tool setups

Compatibility

Designed as a direct-use solid pilot counterbore compatible with 1/4-inch socket-head cap screws. Fits tool holders and chucks accepting a 1/4-inch shank diameter on drill presses, milling machines, and machining centers.

Installation Notes

Installation and use should be performed by qualified machinists familiar with holemaking tooling and machine operation. Always secure the workpiece and ensure the machine is at a safe, appropriate speed before engaging the counterbore. Power down and de-energize the machine before changing or inspecting tooling. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed and feed rate selection.