Value Collection GH8780488 Counterbore 3/4 in 3 Flute

Product Description

The VALUE COLLECTION GH8780488 is a 3-flute interchangeable pilot counterbore designed for precision bore finishing in metal fabrication and machining applications. Built from high speed steel with a bright, uncoated polished finish, this tool delivers clean, consistent countersinking around pre-drilled holes. The 2MT Morse taper shank provides a secure, self-centering fit in compatible taper-socket spindles. With a counterbore diameter of 3/4 inch, a pilot shank compatibility of 1/4 inch, and an overall length of 5-3/8 inches, it is sized for general-purpose shop and production use. Right-hand cutting direction is standard. Installation and operation are suited to machinists, tool-and-die workers, and skilled fabricators.

This counterbore is appropriate for use in drill presses, milling machines, and manual or CNC machining centers equipped with a Number 2 Morse taper spindle. It is suited for residential and light commercial fabrication shops, maintenance and repair operations, and production environments requiring consistent bolt-seat or fastener-seat geometry. The interchangeable pilot design allows the cutting head to be paired with different pilot sizes as job requirements change, reducing tooling inventory.

Key Features

• 3/4 inch counterbore diameter for standard fastener seating applications
• 3 flutes for smooth chip evacuation and reduced chatter
• Number 2 Morse taper (2MT) shank for self-centering spindle engagement
• High speed steel construction for durability across ferrous and non-ferrous materials
• Bright, uncoated polished finish suitable for use with cutting fluids
• Interchangeable pilot accepts 1/4 inch pilot shank diameter

Compatibility

Designed for use with drill presses and milling machines fitted with a Number 2 Morse taper (2MT) spindle socket and compatible with 1/4 inch interchangeable counterbore pilots.

Installation Notes

This tool is installed by machinists or skilled fabricators into a 2MT taper-socket spindle. Ensure the machine is fully powered down and the spindle is stationary before seating or removing the taper shank. Use a drift key and dead-blow mallet to seat the taper properly and to eject it safely. Apply an appropriate cutting fluid for the workpiece material to extend tool life and maintain finish quality.