Value Collection SC1090048 Countersink 90 Degree Hss

Product Description

The VALUE COLLECTION SC1090048 is a single-flute countersink designed for creating chamfered seat profiles in metal, wood, and composite materials. Built from high-speed steel with a bright uncoated finish, it handles standard countersinking operations where a clean, accurate 90-degree included angle is required. The straight cylindrical shank measures 0.5 inches in diameter for secure chuck retention, and the 0.75-inch head diameter provides adequate cutting coverage for common fastener seat sizes. Machinists, tool and die technicians, and maintenance professionals use this tool in manual and CNC drilling operations where consistent countersink geometry is critical.

This countersink is suited for light-to-medium duty countersinking in shop, field, and production environments. The 90-degree included angle aligns with standard flat-head fastener seat geometry, making it appropriate for preparing holes that accept 82-degree or 90-degree flat-head screws and bolts in ferrous and non-ferrous stock. The single-flute design provides good chip clearance and is easier to sharpen than multi-flute versions, making it a practical choice for general-purpose bench and drill-press work.

Key Features

• 90-degree included angle matches standard flat-head fastener seat geometry
• Single flute design promotes chip evacuation and simplifies resharpening
• High-speed steel construction provides hardness suitable for ferrous and non-ferrous materials
• Bright uncoated finish for general-purpose use without added coating cost
• 0.5-inch straight cylindrical shank fits standard drill chucks and collet holders
• No pilot required — suitable for use after a pilot hole has been drilled

Compatibility

Designed as a general-purpose countersink compatible with standard drill presses, CNC machining centers, and hand-held power drills equipped with a chuck accepting a 0.5-inch straight cylindrical shank.

Installation Notes

Installation of this countersink is typically performed by machinists or maintenance technicians. Secure the shank fully in the chuck before operation and verify chuck tightness before starting the spindle. Always pre-drill a pilot hole to the appropriate diameter before countersinking to prevent tool walking and ensure accurate seat geometry. Wear appropriate eye protection and secure the workpiece in a vise or fixture before beginning the cut.