Value Collection GH8840183 Counterbore 9/32 in 4 Flute Hss

Product Description

The VALUE COLLECTION GH8840183 is an interchangeable pilot counterbore designed for precision counterboring operations in metalworking and aircraft-style applications. Built from high speed steel (HSS) with a bright, uncoated polished finish, this tool delivers clean, accurate cuts in a range of ferrous and non-ferrous materials. It features a 9/32 inch counterbore diameter, a 1/4 inch straight shank, and four flutes for efficient chip evacuation and smooth cutting action. The 2-3/8 inch overall length suits standard drill press and CNC setups. Machinists and maintenance technicians working in aerospace, industrial, or general fabrication environments rely on this style of counterbore for creating flat-bottomed recesses for socket head cap screws and similar fasteners.

This counterbore is suited for use in machine shops, maintenance facilities, and aerospace fabrication environments where precise counterbore sizing is required. The interchangeable pilot design accepts a 3/32 inch pilot shank, allowing pilots to be swapped for different fastener clearance requirements without replacing the entire tool body. Right-hand cutting direction makes it compatible with standard drill press and milling machine spindle rotation. It is appropriate for both manual and CNC-controlled operations where consistent recess depth and diameter are critical.

Key Features

• 9/32 inch counterbore diameter for accurately sized fastener recesses
• Interchangeable pilot design accepts a 3/32 inch pilot shank for flexible fastener fitment
• High speed steel construction provides durability across a range of workpiece materials
• Four-flute geometry promotes smooth cutting and efficient chip removal
• Bright, uncoated polished finish for low-friction cutting in general-purpose applications
• Aircraft style configuration meets demands of aerospace and precision fabrication work

Compatibility

Designed as an OEM-style interchangeable pilot counterbore compatible with standard 1/4 inch straight shank tool holders on drill presses, milling machines, and CNC machining centers. Accepts a 3/32 inch interchangeable pilot shank.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Secure the 1/4 inch straight shank firmly in the tool holder and verify the pilot is fully seated before operation. Always power down and de-energize the machine spindle before changing pilots or adjusting tool setup. Use appropriate cutting fluid or lubricant for the workpiece material to maximize tool life and cut quality.