Value Collection GH8816126 Counterbore 1-3/16 in 3 Flute Hss

Product Description

The Value Collection GH8816126 is an interchangeable pilot counterbore designed for precision counter-boring operations in metal fabrication and machining applications. Built from cobalt high-speed steel (HSS) with a bright, uncoated polished finish, this tool delivers reliable performance in ferrous and hard materials. It features a 1-3/16 inch counterbore diameter, a 1 inch straight shank, and 3 flutes for efficient chip evacuation. Overall length is 6-3/8 inches, with a shank length of 4-5/8 inches. The interchangeable pilot system accepts a 5/16 inch pilot shank diameter, allowing the same body to be used with different pilot sizes. Right-hand cutting direction is standard.

This counterbore is suited for machine shop, maintenance, and industrial production environments where accurately sized counterbores are required for socket head cap screws or similar fasteners. It is appropriate for use in manual mills, drill presses, and CNC machining centers. The straight shank design allows direct mounting in standard chucks or collet holders without adapters. Machinists and tool-and-die technicians are the primary installers of this type of tooling.

Key Features

• Cobalt high-speed steel construction for increased heat and wear resistance compared to standard HSS
• Bright, uncoated polished finish reduces friction and allows visual wear monitoring
• 3-flute geometry promotes chip clearance and smooth cutting action
• Interchangeable pilot accepts 5/16 inch pilot shank diameter
• Straight shank compatible with standard drill chucks and collet holders
• Right-hand cutting direction for use with conventional spindle rotation

Compatibility

Designed as an OEM-style replacement or direct-use interchangeable pilot counterbore for machine shop and industrial applications requiring a 1-3/16 inch counterbore diameter with a 5/16 inch interchangeable pilot shank.

Installation Notes

Installation is performed by qualified machinists. Secure the straight shank firmly in a properly sized chuck or collet holder before operation. Ensure the correct pilot is seated and locked before beginning the cut. Power down and de-energize the spindle completely before changing pilots or removing the tool from the holder. Follow applicable shop safety procedures and machine manufacturer guidelines for speeds and feeds.