Value Collection GH8780405 Counterbore 5/8 in 3 Flute 2MT

Product Description

The VALUE COLLECTION GH8780405 is a 5/8-inch diameter interchangeable pilot counterbore designed for precision metal-cutting applications. Built from high speed steel with a bright, uncoated polished finish, this tool delivers consistent cutting performance in ferrous and non-ferrous materials. It features a 2MT Morse taper shank for secure, repeatable seating in compatible machine spindles. With 3 flutes and right-hand cutting direction, it produces clean, flat-bottomed counterbore seats. Overall length is 5.125 inches. This tool is intended for machinists, tool and die shops, and maintenance professionals requiring accurate counterboring on production or repair work.

This counterbore is suited for general-purpose counterboring operations in manual mills, drill presses, and CNC machines equipped with a No. 2 Morse taper spindle or adapter. The interchangeable pilot design allows the pilot to be swapped for different pilot shank diameters without replacing the body. The 3/16-inch pilot shank diameter compatibility makes it appropriate for use with standard interchangeable pilot sets. Typical applications include creating flat-bottom recesses for socket head cap screws and similar fasteners in steel, aluminum, and cast iron workpieces.

Key Features

• 5/8-inch counterbore diameter for standard fastener recess work
• 3 flutes with right-hand cutting direction for smooth material removal
• No. 2 Morse taper (2MT) shank for rigid spindle connection
• Interchangeable pilot accepts 3/16-inch pilot shank diameter
• High speed steel construction for durability across common shop materials
• Bright, uncoated polished finish — no coating buildup concerns during regrind

Compatibility

Designed for use in machine spindles accepting a No. 2 Morse taper. Compatible with standard interchangeable pilot systems using a 3/16-inch pilot shank diameter. Verify spindle taper and pilot compatibility before installation.

Installation Notes

Installation is performed by qualified machinists. Power down and lock out the machine spindle before inserting or removing the Morse taper shank. Seat the taper fully using a proper drift and tang engagement — never force with excessive hammer blows. Confirm pilot fit and concentricity before running under power, and use appropriate cutting fluid for the workpiece material.