Value Collection SC2182012 Countersink 5/16 in 82 Deg 6 Flute

Product Description

The VALUE COLLECTION SC2182012 is a single-end cobalt steel countersink designed for deburring, chamfering, and countersinking operations in metal fabrication and machining applications. It features a 5/16 inch head diameter with an 82-degree included angle and six flutes for smooth, chatter-resistant cutting. The 1/4 inch straight-cylindrical shank fits standard drill chucks and quick-change holders. The bright, uncoated finish is typical of cobalt steel tooling suited for use on stainless steel, alloy steel, and other hard materials. Machinists, tool and die workers, and maintenance technicians are the primary users of this type of cutting tool.

This countersink is intended for use in drill presses, CNC machining centers, and hand-held drilling equipment where a consistent 82-degree countersunk seat is required. The 82-degree included angle matches the geometry of flat-head machine screws and bolts commonly used in aerospace and general metalworking assemblies. The six-flute design reduces vibration and produces a cleaner finish compared to single- or three-flute alternatives. It is sold as a single unit with no pilot included, making it suitable for use with separate pilot guides or in pilot-free setups.

Key Features

• 5/16 inch head diameter with 82-degree included angle for standard flat-head fastener prep
• Six flutes provide smooth cutting action and reduced chatter on hard materials
• Cobalt steel construction offers increased heat and wear resistance compared to HSS
• 1/4 inch straight-cylindrical shank fits standard chucks and quick-change systems
• Right-hand cut, single-end design with no pilot for versatile setup configurations
• Bright, uncoated finish suitable for use across a range of ferrous metals

Compatibility

Designed as an OEM-style single-end countersink for use in drill presses, machining centers, and handheld drilling equipment accepting a 1/4 inch straight-cylindrical shank.

Installation Notes

This tool is installed and used by machinists and maintenance technicians. Secure the shank firmly in the drill chuck or quick-change holder before operation and verify the workpiece is clamped to prevent movement. Use appropriate cutting fluid or lubricant when countersinking hard alloys to extend tool life and improve finish quality. Inspect the cutting edges for wear before each use and replace the tool if chipping or dulling is observed.