Cleveland C46435 Counterbore 5/8in 1/2in Shank 3 Flute Hss

Product Description

The CLEVELAND C46435 is a 3-flute interchangeable pilot counterbore designed for precise counterboring operations in a wide range of metals. Built from high-speed steel with a bright, uncoated finish, it delivers consistent cutting performance on alloy tool steel, aluminum, cast iron, low-carbon steel, and medium-carbon steel. The straight shank measures 0.5 inches in diameter and 3.875 inches in length, with an overall length of 5.125 inches. Right-hand cutting geometry and a 0.625-inch counterbore diameter make this tool well-suited for production and maintenance machining environments where accuracy and repeatability are required.

This counterbore is intended for use in machine shops, manufacturing facilities, and maintenance operations where interchangeable pilots allow a single tool body to serve multiple fastener clearance sizes. The 3/16-inch pilot shank diameter compatibility makes it suitable for standard bolt-clearance counterboring. It is typically run in drill presses, milling machines, or CNC machining centers. Machinists and tool-and-die professionals working with ferrous and non-ferrous metals will find this tool appropriate for spot-facing, bolt-seat preparation, and recessed fastener applications.

Key Features

• 0.625-inch counterbore diameter for standard bolt-seat and fastener-recess applications
• Interchangeable pilot design with 3/16-inch pilot shank diameter compatibility
• 3-flute geometry for smooth chip evacuation and consistent finish
• High-speed steel construction provides durability across ferrous and non-ferrous materials
• Bright, uncoated finish suitable for use with cutting fluids
• Right-hand cutting direction, compatible with standard machine spindles

Compatibility

Compatible with materials including alloy tool steel, aluminum, cast iron, low-carbon steel, and medium-carbon steel. Accepts a 3/16-inch interchangeable pilot. Designed for use in drill presses, vertical mills, and CNC machining centers with a straight-shank toolholder or collet rated for a 0.5-inch shank diameter.

Installation Notes

Installation and operation should be performed by a qualified machinist familiar with rotary cutting tools. Secure the straight shank in a properly sized collet or drill chuck before operation, and verify pilot fit before beginning a cut. Always power down and lock out the machine spindle before changing pilots or removing the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish quality.