Value Collection SC4090048 Countersink 90 Deg 3 Flute Hss

Product Description

The VALUE COLLECTION SC4090048 is a single-end countersink designed for deburring and seat-forming operations in metal, wood, and composite materials. Built from high-speed steel with a bright uncoated finish, it features a 90-degree included angle and three flutes for smooth, controlled material removal. The straight-cylindrical shank measures 0.5 inches in diameter, and the countersink head reaches 0.75 inches across. Right-hand cutting direction makes it compatible with standard drill press and hand-drill setups. This tool is sold individually and suited for machinists, fabricators, maintenance technicians, and skilled tradespeople who need a reliable countersink for fastener seat preparation.

This countersink is used in countersinking applications where a 90-degree seat angle is required for flat-head fasteners. It fits standard 0.5-inch straight-cylindrical collets and chuck configurations. Typical use cases include sheet metal fabrication, structural assembly, and general machine shop work where clean, accurate countersink profiles are needed. No pilot is included, so centering on a pre-drilled hole is required before engaging the tool.

Key Features

• 90-degree included angle produces accurate seats for standard flat-head fasteners
• 3-flute geometry promotes smooth cutting action and reduces chatter
• High-speed steel construction offers durability across a range of ferrous and non-ferrous materials
• Bright uncoated finish with 0.5-inch straight-cylindrical shank for broad chuck compatibility
• Single-end design with no pilot included — requires pre-drilled hole for accurate positioning
• Right-hand cutting direction for use with standard drill presses and hand drills

Compatibility

Designed as a general-purpose countersink for use in drill presses, CNC machines, and hand drills equipped with a 0.5-inch straight-cylindrical collet or keyed chuck capable of accepting a 0.5-inch shank.

Installation Notes

Install the shank securely in a 0.5-inch collet or keyed chuck before operation; ensure the workpiece is clamped firmly to prevent movement. Always power down and lock out the machine before changing tooling. A pre-drilled pilot hole is required since this countersink does not include a pilot. Use appropriate cutting speeds for the workpiece material — consult standard machining references for HSS speed and feed recommendations.