Cleveland C46123 Countersink 5/8 in 120 Degree Hss

Product Description

The CLEVELAND C46123 is a single-flute high speed steel countersink designed for creating conical seat profiles in carbon steel and cast iron workpieces. The tool features a 5/8 inch head diameter and a 120-degree included angle, making it suited for standard countersunk fastener applications where a clean, accurate seat is required. The 3/8 inch straight-cylindrical shank fits standard drill chucks and milling machine collets. An oxide coating provides light corrosion resistance and reduces friction during cutting. Right-hand cutting direction follows conventional rotation, and the single-flute geometry reduces chatter on harder ferrous materials.

This countersink is used in metalworking environments where technicians and machinists need to prepare holes for flat-head screws and bolts in carbon steel or cast iron parts. It is appropriate for bench drill presses, CNC machining centers, and handheld drill applications where a 3/8 inch shank size is compatible with the available toolholder. The single-flute design is a common choice for production and maintenance shops working with ferrous metals that require chatter-free, consistent countersink geometry.

Key Features

• 5/8 inch head diameter with 120-degree included angle for standard flat-head fastener seating
• Single-flute design minimizes chatter in carbon steel and cast iron applications
• High speed steel construction provides durability in ferrous metal cutting
• Oxide coating reduces friction and provides light corrosion resistance
• 3/8 inch straight-cylindrical shank fits standard drill chucks and collets
• Right-hand cut follows conventional machine rotation — no special spindle setup required

Compatibility

Designed for countersinking operations in carbon steel and cast iron. Fits any drill press, machining center, or handheld drill accepting a 3/8 inch straight-cylindrical shank toolholder.

Installation Notes

Installation and use should be performed by qualified machinists or metalworking technicians familiar with rotating cutting tools. Secure the shank fully in the chuck or collet before operation and verify the workpiece is clamped or fixtured to prevent movement. Power down and de-energize the machine before changing tooling. Follow the machine manufacturer guidelines for speed selection based on workpiece material and tool diameter.