Value Collection GH8791204 Counterbore 5 Flute Hss

Product Description

The VALUE COLLECTION GH8791204 is a 5-flute interchangeable pilot counterbore designed for precision counter-boring operations in metal fabrication and machining applications. Built from high speed steel with a bright, uncoated finish, this tool delivers consistent cutting performance in a wide range of shop environments. The counterbore measures 1-5/16 inches in diameter with a 1-inch straight shank and an overall length of 6-5/8 inches. Right-hand cutting geometry suits standard drill press and milling machine setups. The interchangeable pilot design accepts a 3/8-inch pilot shank, allowing for flexible use across multiple bore sizes without replacing the entire tool body.

This counterbore is suited for machining professionals, tool and die shops, and general manufacturing environments requiring accurate flat-bottomed recesses for fastener seating. It is appropriate for use on ferrous and non-ferrous metals in both production and maintenance-repair-overhaul contexts. The straight shank and standard dimensions make it compatible with common drill press chucks and mill collet systems found in most machine shops.

Key Features

• 1-5/16 inch counterbore diameter for flat-bottomed fastener recesses
• 5-flute geometry for smooth cutting and improved chip evacuation
• High speed steel construction for durability across a range of metals
• Interchangeable pilot accepts 3/8-inch pilot shank diameter
• Bright, uncoated finish suited for general-purpose machining
• Right-hand cutting direction compatible with standard machine setups

Compatibility

Designed as a general-purpose interchangeable pilot counterbore compatible with drill press chucks and milling machine collet holders accepting a 1-inch straight shank, with an interchangeable pilot port sized for 3/8-inch pilot shanks.

Installation Notes

Installation and use should be performed by qualified machinists or tooling professionals. Secure the straight shank firmly in a properly sized collet or drill chuck before operation, and confirm pilot shank engagement before beginning a cut. Always power down and lock out the machine before changing pilots or inspecting the cutting edges. Follow applicable shop safety standards and manufacturer feed-and-speed guidelines for high speed steel tooling when selecting operating parameters.