Value Collection GH8780280 Counterbore 7/16 in 3 Flute Morse Taper

Product Description

The VALUE COLLECTION GH8780280 is a 3-flute interchangeable pilot counterbore designed for precision spot-facing and counterboring operations in metal fabrication and machining applications. The tool is ground from high speed steel (HSS) and features a bright, uncoated finish with a polished surface. The 7/16-inch counterbore diameter and 1MT Morse taper shank allow secure seating in compatible drill press or milling machine spindles. At 4.0625 inches overall length, it offers sufficient reach for most standard counterboring tasks. Installation and operation are handled by machinists and tool-and-die tradespeople working in shop environments.

This counterbore is suited for right-hand cutting in ferrous and non-ferrous metals where a flat-bottomed recess is required to seat fastener heads flush or below the workpiece surface. The interchangeable pilot design accepts a 5/32-inch pilot shank, allowing the cutting diameter to be used with the appropriate pilot for the specific clearance hole size. Typical applications include machine shops, maintenance and repair operations, and production environments requiring consistent counterbore geometry.

Key Features

• 7/16-inch counterbore diameter for standard fastener recessing
• 3-flute geometry for balanced cutting and chip evacuation
• 1MT Morse taper shank for positive drive and easy tool change
• Interchangeable pilot accepts 5/32-inch pilot shank diameter
• High speed steel construction provides durability across a range of workpiece materials
• Bright, uncoated and polished finish — no coating buildup to affect dimensional accuracy

Compatibility

Designed for use in drill presses, milling machines, and other spindles accepting a No. 1 Morse taper (1MT) tool shank. Compatible pilot shank diameter is 5/32 inches.

Installation Notes

Installation is performed by a machinist or qualified tool operator. Ensure the machine spindle is fully powered down and locked out before mounting or removing the tool. Seat the Morse taper shank fully into the spindle socket and confirm positive engagement before operation. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.