Cleveland C46158 Countersink 3/8 in 90 Degree 3 Flute Hss

Product Description

The CLEVELAND C46158 is a single-end, three-flute countersink designed for deburring and seat preparation in carbon steel and cast iron workpieces. The tool features a 90-degree included angle with a 45-degree centerline angle, a 3/8 inch head diameter, and a straight cylindrical 1/4 inch shank for compatibility with standard drill chucks and collet holders. The high speed steel construction with an oxide finish provides adequate hardness and corrosion resistance for general-purpose machining operations. Right-hand cut geometry ensures consistent chip evacuation during countersinking passes.

This countersink is suited for machine shops, maintenance facilities, and fabrication environments where precise countersink seats are required in carbon steel and cast iron. It is appropriate for use in drill presses, CNC machining centers, and handheld drill applications where a 1/4 inch shank tool fits the work holding setup. The three-flute design balances cutting speed with surface finish quality in production and repair workflows. No pilot is included, making it a straightforward drop-in tool for operators using existing guide fixtures or free-hand technique.

Key Features

• 3/8 inch head diameter with 90-degree included angle for standard countersink seat geometry
• Three flutes for balanced cutting action and improved surface finish
• High speed steel construction suited for carbon steel and cast iron applications
• Oxide finish for added wear resistance and surface protection
• Straight cylindrical 1/4 inch shank fits standard chucks and collet holders
• Right-hand cut direction for use with conventional clockwise-rotation spindles

Compatibility

Designed for countersinking operations in carbon steel and cast iron. Compatible with any drill press, milling machine, or handheld drill equipped with a chuck or collet capable of accepting a 1/4 inch straight shank.

Installation Notes

This tool is installed by machinists and maintenance technicians into a standard drill chuck or collet rated for the 1/4 inch shank diameter. Secure the shank firmly before operation and confirm spindle rotation is set to right-hand before engaging the workpiece. Always clamp the workpiece securely to prevent movement during countersinking. Inspect the cutting edges for wear before each use and replace the tool if chipping or dulling is observed.