Cleveland C46165 Countersink 1/2 in 100 Degree 3 Flute Hss

Product Description

The CLEVELAND C46165 is a single-end, three-flute countersink designed for producing clean, accurately angled seats in ferrous materials. It features a 1/2-inch head diameter with a 100-degree included angle (50-degree centerline angle) ground from high speed steel (HSS) with an oxide finish for basic lubricity and corrosion resistance. The 1/4-inch straight-cylindrical shank fits standard drill presses, CNC machining centers, and hand drills with compatible chucks. This tool is intended for machinists, toolroom technicians, and fabricators performing countersinking operations in production or maintenance environments.

The C46165 is suited for countersinking in carbon steel and cast iron workpieces. The 100-degree included angle matches fastener head geometry common in aerospace and general industrial fastener specifications. With three flutes, the tool provides a good balance of chip clearance and surface finish quality, making it appropriate for both manual drilling setups and light CNC applications where a pilotless, free-cutting countersink is preferred over a single-flute style.

Key Features

• 1/2-inch head diameter with 100-degree included angle for precise fastener seat geometry
• Three flutes for improved chip evacuation and finish quality compared to single-flute designs
• High speed steel construction handles carbon steel and cast iron applications
• Oxide finish provides basic lubricity and surface protection
• 1/4-inch straight-cylindrical shank for broad chuck compatibility
• Pilotless, single-end design for flexible positioning without a center guide

Compatibility

Designed for countersinking operations in carbon steel and cast iron. Compatible with any drill press, hand drill, or machining center equipped with a chuck that accepts a 1/4-inch straight-cylindrical shank.

Installation Notes

This tool should be installed and operated by qualified machinists or toolroom personnel familiar with rotary cutting tool safety. Secure the shank firmly in the chuck before operation and verify spindle speed is appropriate for the material and head diameter before engaging the workpiece. Always wear appropriate eye protection and ensure the workpiece is clamped securely to prevent movement during cutting. Do not exceed the tool material application range; this countersink is rated for carbon steel and cast iron only.