Cleveland C46440 Counterbore 25/32 in 3 Flutes Hss

Product Description

The CLEVELAND C46440 is a 3-flute interchangeable pilot counterbore designed for precision counterboring operations in metalworking applications. Built from high-speed steel with a bright uncoated finish, this tool accepts a replaceable pilot for versatility across multiple bore diameters. The 25/32 inch counterbore diameter and 5/8 inch straight shank mount securely in standard toolholders and drill presses. With an overall length of 5-3/8 inches and a right-hand cutting direction, the C46440 delivers consistent results when counterboring for fastener head seating in production and maintenance environments. Installation and use are handled by machinists and tool-and-die professionals.

This counterbore is suited for use on a range of workpiece materials including alloy tool steel, aluminum, cast iron, low-carbon steel, and medium-carbon steel. The interchangeable pilot design allows the body to be paired with different pilot shank diameters as the job requires, with a pilot shank diameter compatibility of 1/4 inch. It is appropriate for both manual drill press work and machine tool setups where consistent counterbore depth and concentricity are required.

Key Features

• 25/32 inch counterbore diameter for accurate fastener head recessing
• 3 flutes for improved chip evacuation and surface finish
• High-speed steel construction provides durability across ferrous and non-ferrous materials
• Bright uncoated finish suitable for use with cutting fluids
• Interchangeable pilot accepts 1/4 inch pilot shank diameter
• Right-hand cutting direction for standard spindle rotation

Compatibility

Compatible with 1/4 inch interchangeable pilot shanks. Designed for use on alloy tool steel, aluminum, cast iron, low-carbon steel, and medium-carbon steel workpieces. Fits standard straight-shank toolholders accepting a 5/8 inch shank.

Installation Notes

Install the counterbore body into a compatible straight-shank toolholder and secure the pilot before beginning the cut. Ensure the workpiece is clamped firmly and the spindle speed is set appropriately for the workpiece material and counterbore diameter. Apply a suitable cutting fluid to extend tool life and improve finish quality. Inspect the interchangeable pilot for wear or damage before each use and replace as needed.