Cleveland C46279 Combo Drill Countersink Size 18 Hss

Product Description

The CLEVELAND C46279 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single operation. Built from high-speed steel with a bright, uncoated finish, this double-end tool accepts a right-hand cutting direction and features a bell-style cutting edge with a 60-degree included angle. The drill point measures 0.25 inches in diameter and 0.25 inches in length, while the body diameter is 0.75 inches and the overall length is 3.5 inches. It is sized as a trade size 18 tool and is suited for machinists, tool-and-die workers, and fabricators working with metal in production or job-shop environments.

This combo drill countersink is used in drilling and countersinking operations on a range of ferrous and non-ferrous metals. Primary and secondary workpiece materials include alloy tool steel, aluminum, carbon steel, and cast iron. The double-end design extends tool life by providing two usable ends. The bell-style cutting edge geometry is well suited for creating clean countersink seats for flat-head fasteners. Typical applications include metalworking, fabrication, and machine shop work where a pre-drilled pilot and countersink are required in one pass.

Key Features

• High-speed steel construction for durability across steel, aluminum, and cast iron
• Double-end design provides two usable cutting ends to extend tool life
• Bell-style cutting edge with 60-degree included angle for clean countersink seats
• Bright uncoated finish with 118-degree drill point angle for general-purpose metal cutting
• Right-hand cut compatible with standard drill presses, lathes, and CNC setups
• Trade size 18 with 0.25-inch drill point diameter for common fastener countersinking

Compatibility

Designed for use on alloy tool steel, aluminum, carbon steel, and cast iron workpieces. Compatible with standard drill press, lathe, or CNC spindles accepting a 0.75-inch body diameter tool.

Installation Notes

Installation and use should be performed by machinists or qualified metal fabricators familiar with cutting tool setup and speeds. Secure the workpiece and verify spindle speed is appropriate for the workpiece material and tool diameter before operation. Inspect both cutting ends for wear or chipping before use. Do not exceed the tool manufacturer recommended feed and speed parameters for the workpiece material.