Cleveland C46266 Combo Drill Countersink Size 4 Hss

Product Description

The CLEVELAND C46266 is a combination drill countersink designed for simultaneous drilling and countersinking in a single operation. Built from high-speed steel (HSS) with a bright, uncoated finish, this tool features a 5/16-inch body diameter and a 1/8-inch drill point diameter. The 118-degree drill point angle and 60-degree included countersink angle produce clean, accurate entry holes and countersunk seats in one pass. At 2-1/8 inches overall length, it fits standard drill chucks and milling setups used by machinists, maintenance technicians, and fabricators working in production or job-shop environments.

This combo drill countersink is suited for use on a wide range of metallic workpiece materials including alloy tool steel, aluminum, carbon steel, and cast iron. The plain cutting edge style and right-hand cutting direction make it compatible with standard drill presses, CNC machining centers, and hand-held drilling equipment. The double-end design supports countersinking and drilling tasks in both production and maintenance applications. It is a practical choice for trade professionals who need a single tool to prep fastener holes without changing tooling between operations.

Key Features

• Simultaneous drilling and countersinking in one pass reduces setup time
• High-speed steel construction provides durability across ferrous and non-ferrous metals
• 118-degree drill point angle for standard metalworking entry cuts
• 60-degree included countersink angle for common flat-head fastener seating
• Bright uncoated finish suitable for general-purpose metal cutting
• Double-end design extends tool life by providing two usable cutting ends

Compatibility

Designed for use on alloy tool steel, aluminum, carbon steel, and cast iron workpieces. Compatible with standard drill presses, manual mills, and CNC machining centers that accept 5/16-inch shank tooling.

Installation Notes

Install in a compatible drill chuck or collet, ensuring the shank is fully seated and secured before operation. Confirm spindle rotation is set to right-hand (clockwise) before engaging the workpiece. Use appropriate cutting fluid or lubricant when working with ferrous materials to extend tool life and maintain cut quality. Inspect the cutting edges for wear before each use and replace the tool if chipping or dulling is observed.