Value Collection SC4090056 Countersink 90 Degree 3 Flute

Product Description

The VALUE COLLECTION SC4090056 is a single-end, straight-shank countersink designed for deburring and seat-preparing countersunk fastener holes in metal and other materials. Built from high-speed steel with a bright uncoated finish, this tool features a 90-degree included angle and a 45-degree centerline angle. The 3-flute design provides clean, chatter-resistant cutting action on a standard 1/2-inch straight-cylindrical shank. No pilot is included, and the head is not a head-only style, making it a complete countersink unit. Machinists and tool-and-die professionals reach for this style when preparing holes for flat-head fasteners or chamfering entry points on drilled bores.

This countersink is suited for use in manual drill presses, CNC machining centers, and hand-held drilling equipment that accepts a 1/2-inch shank. The 7/8-inch head diameter accommodates common fastener seat sizes found in general metalworking, maintenance, repair, and light fabrication environments. Right-hand cutting direction matches standard spindle rotation on conventional equipment. It is a practical go-to for job-shop floors, maintenance departments, and trade apprentices learning proper hole finishing techniques.

Key Features

• 90-degree included angle for standard flat-head fastener seating
• 3-flute geometry for smooth, reduced-chatter cutting performance
• High-speed steel construction provides durability across a range of workpiece materials
• 1/2-inch straight-cylindrical shank fits common drill chucks and toolholders
• Bright uncoated finish for straightforward regrinding and inspection
• Single-end design with no pilot for flexible application across hole sizes

Compatibility

Designed as a general-purpose replacement or addition for any setup requiring a 1/2-inch straight-shank countersink with a 90-degree included angle and 3-flute right-hand cutting geometry.

Installation Notes

Install into a drill chuck or collet rated for a 1/2-inch shank and verify the workpiece is securely fixtured before starting the spindle. Power down all equipment before mounting or removing this tool. Apply cutting fluid or lubricant appropriate for the workpiece material to extend tool life and improve finish quality. Follow applicable shop safety standards and machine-tool operating procedures when setting depth stops or feed rates.