Cleveland C46429 Counterbore 7/16 in 3 Flute Hss

Product Description

The CLEVELAND C46429 is a three-flute interchangeable pilot counterbore designed for precision seat-cutting in machined metal components. Built from high-speed steel with a bright, uncoated finish, this counterbore delivers clean, accurate results on a range of ferrous and non-ferrous materials. The straight shank measures 3/8 inches in diameter and seats securely in standard toolholders. Overall length is 4-1/16 inches, with a shank length of 3-1/16 inches. The right-hand cutting direction suits standard spindle rotation. This tool is selected by machinists, toolmakers, and maintenance technicians requiring consistent counterbore geometry without regrinding the pilot.

The C46429 is suited for use in vertical mills, drill presses, and manual machining centers where counterbored bolt or fastener holes are required. The interchangeable pilot design allows the operator to swap pilot sizes to match different fastener clearance requirements without replacing the body. Compatible pilot shank diameter is 5/32 inches. Typical applications include work on alloy tool steel, aluminum, cast iron, low-carbon steel, and medium-carbon steel workpieces in production and maintenance environments.

Key Features

• 7/16 inch counterbore diameter for precise seat geometry
• 3 flutes for smooth chip evacuation and surface finish
• High-speed steel construction handles a broad range of metal materials
• Bright, uncoated finish suitable for general-purpose cutting
• Interchangeable pilot accepts 5/32 inch pilot shank
• Right-hand cut, straight shank for straightforward toolholder mounting

Compatibility

Accepts a 5/32 inch pilot shank. Compatible material applications include alloy tool steel, aluminum, cast iron, low-carbon steel, and medium-carbon steel. Designed as a direct-fit interchangeable pilot counterbore for standard straight-shank toolholders with a 3/8 inch bore.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard toolholder equipment. Ensure the machine spindle is fully stopped and the tool is securely clamped in the holder before beginning any cut. Verify pilot shank fit before engaging the workpiece to prevent tool deflection or seat damage. Follow applicable shop safety procedures and machine manufacturer guidelines during setup and operation.