Cleveland C46104 Countersink 1/4 in 100 Degree Hss

Product Description

The CLEVELAND C46104 is a single-flute, high speed steel countersink designed for deburring and chamfering operations in metal fabrication and machining applications. With a 1/4 inch head diameter and a 100-degree included angle, this tool produces clean, accurately sized countersink seats for flat-head fasteners in carbon steel and cast iron workpieces. The straight-cylindrical 3/16 inch shank fits standard drill chucks and rotary tool holders. An oxide coating provides basic surface protection during cutting. Right hand cut geometry and a single flute make this an efficient choice for hand-drill or drill-press operations where chatter control and simplicity matter.

The C46104 is suited for light to medium countersinking tasks in job shop, maintenance, and assembly environments. It is commonly used by machinists, fabricators, and general tradespeople who need a reliable, no-pilot countersink for working carbon steel or cast iron components. The 100-degree included angle matches common flat-head machine screw seat angles used in industrial and structural assemblies. This tool is appropriate for bench drill press work as well as hand-held power drill applications.

Key Features

• 1/4 inch head diameter with 100-degree included angle for flat-head fastener seating
• Single-flute geometry reduces chatter and simplifies regrinding
• High speed steel construction handles carbon steel and cast iron workpieces
• 3/16 inch straight-cylindrical shank fits standard drill chucks
• Oxide finish provides basic corrosion and wear resistance
• Right hand cut, single end design for straightforward countersinking operations

Compatibility

Designed for countersinking operations in carbon steel and cast iron. Compatible with standard drill chucks and drill press spindles accepting a 3/16 inch straight-cylindrical shank. No pilot included.

Installation Notes

Install the shank securely in a keyed or keyless drill chuck before operation. Secure the workpiece firmly to prevent movement during cutting. Use appropriate cutting fluid or lubricant when working carbon steel to extend tool life and improve finish quality. Follow shop safety practices and wear appropriate eye protection during all drilling and countersinking operations.