Value Collection GH8781445 Counterbore 1-11/16 in 5 Flute

Product Description

The VALUE COLLECTION GH8781445 is an interchangeable pilot counterbore designed for precision counterboring operations in metalworking and machining applications. Built from high-speed steel with a bright, uncoated finish, this tool delivers reliable performance in ferrous and non-ferrous materials. The counterbore measures 1-11/16 inches in diameter and features 5 flutes for efficient chip evacuation and smooth cutting action. A 4MT Morse taper shank provides secure, self-centering tool holding in compatible machine spindles. With an overall length of 8-1/8 inches, this tool suits a range of deep-reach counterboring tasks performed by machinists, tool-and-die makers, and maintenance technicians.

This counterbore is suited for creating flat-bottomed recesses for socket head cap screws, bolts, and fastener heads in metal workpieces. The interchangeable pilot design accommodates a 7/16 inch pilot shank, allowing the pilot to be swapped for different bore sizes without replacing the entire tool body. Right-hand cutting direction is standard for use in conventional drill presses, milling machines, and lathes equipped with a Morse taper spindle or adapter sleeve.

Key Features

• 1-11/16 inch counterbore diameter for standard fastener seating applications
• 5-flute geometry promotes smooth cutting and efficient chip removal
• 4MT Morse taper shank for self-centering, secure spindle engagement
• Interchangeable pilot accepts 7/16 inch pilot shank diameter
• High-speed steel construction provides durability across a range of workpiece materials
• Bright, uncoated finish suitable for general-purpose use

Compatibility

Designed for use in machine spindles accepting a No. 4 Morse taper. Compatible with a 7/16 inch interchangeable pilot shank. Suitable for drill presses, milling machines, and lathes configured for Morse taper tooling.

Installation Notes

Installation is performed by a machinist or qualified tooling technician. Ensure the machine spindle is fully de-energized and at rest before mounting or removing the tool. Use a proper Morse taper drift and soft mallet to seat and remove the shank safely. Verify pilot shank fit before running the tool under power to prevent runout and workpiece damage.