Value Collection GH8794026 Counterbore Set 11 Piece

Product Description

The VALUE COLLECTION GH8794026 is an 11-piece interchangeable pilot counterbore set designed for machinists, tool-and-die workers, and maintenance professionals who need consistent, clean counterbore results across multiple fastener sizes. Built from high speed steel with a bright polished finish, the set features straight-shank tooling with 3-flute geometry. The 3-flute design balances chip evacuation with wall finish quality, making it suitable for production drilling and repair work in steel, aluminum, and similar materials. The interchangeable pilot system allows a single set to cover a range of fastener head diameters without requiring separate dedicated tools for each bore size.

This set is used in machine shops, fabrication environments, and maintenance facilities where countersunk or flat-bottom recesses are required for socket head cap screws, bolts, and similar fasteners. The straight shank configuration fits standard drill press chucks and milling machine collets. It is well suited for both bench-top drill press work and light-duty mill operations where pilot-guided boring is preferred for accuracy and repeatability.

Key Features

• 11-piece set covers multiple fastener sizes with a single interchangeable pilot system
• 3-flute geometry provides balanced chip clearance and improved bore finish
• High speed steel construction offers durability in steel, aluminum, and general-purpose applications
• Bright polished finish reduces friction and aids chip flow during cutting
• Straight shank fits standard drill press chucks and milling collets without adapters
• Standard pilot sizing compatible with common counterbore pilot diameters

Compatibility

Designed as an OEM-style replacement and standard fitment for interchangeable pilot counterbore applications requiring straight-shank tooling in high speed steel with 3-flute geometry.

Installation Notes

Installation and use should be performed by qualified machinists or trained maintenance technicians familiar with rotating tool safety. Secure the workpiece fully before engaging the counterbore and confirm the pilot fits the pilot hole without excessive play before cutting. Always power down and lock out the machine before changing pilots or switching counterbore heads. Follow applicable shop safety standards and machine tool operating procedures when setting speeds and feeds for the material being bored.