Cleveland C46218 Countersink 0.625 in 90 Deg 4 Flute Hss

Product Description

The CLEVELAND C46218 is a single-end, 4-flute countersink designed for right-hand cutting in metalworking applications. Built from high speed steel with an oxide coating, it produces clean, chamfered seats for flat-head fasteners. The 5/8-inch (0.625-inch) head diameter and 90-degree included angle make it well suited for standard countersinking work in alloy tool steel and cast iron. The straight-cylindrical shank measures 3/8 inch in diameter for secure chuck retention. This tool does not include a pilot, and is intended for use in drill presses, milling machines, or hand-held power drills operated by machinists and maintenance trades.

The C46218 is applied wherever a 90-degree countersunk seat is required prior to fastener installation. Common scenarios include fabrication shops, maintenance and repair operations, and production environments working with alloy tool steel or cast iron components. The 4-flute geometry reduces chatter and produces a smoother finish compared to single-flute alternatives, making it a reliable choice for repetitive countersinking tasks where hole quality matters.

Key Features

• 5/8-inch (0.625-inch) head diameter with 90-degree included angle and 45-degree centerline angle
• 4-flute design reduces chatter and improves surface finish
• High speed steel construction for durability in ferrous materials
• Oxide coating provides mild corrosion resistance and reduces friction
• Straight-cylindrical 3/8-inch shank fits standard drill chucks and collets
• Single-end, no-pilot design for straightforward setup in machine or handheld applications

Compatibility

Rated for use in alloy tool steel and cast iron. Designed as a standard 90-degree countersink for use with common flat-head fastener specifications in those materials.

Installation Notes

Install in a drill press, milling machine, or power drill with a chuck rated for a 3/8-inch straight shank. Ensure the workpiece is firmly clamped before operation. Use cutting fluid appropriate for ferrous metals to extend tool life and improve hole finish. Inspect the cutting edges for wear before each use and replace if chipping or dulling is observed.