Value Collection SC1090024 Countersink 90 Degree Hss

Product Description

The VALUE COLLECTION SC1090024 is a single-flute, high-speed steel countersink designed to create clean, accurate 90-degree countersunk holes in metal and similar materials. With a 3/8-inch head diameter and a 1/4-inch straight cylindrical shank, it seats securely in standard drill chucks and countersink holders. The bright, uncoated finish suits general-purpose countersinking where coating adhesion or heat buildup is not a primary concern. Right-hand cutting direction follows standard rotation. This tool is used by machinists, maintenance techs, and fabricators for deburring, chamfering, and preparing holes to accept flat-head fasteners flush with a workpiece surface.

This countersink is suited to light-duty shop and field applications where a single-flute tool provides smooth cutting action with minimal chatter. The 90-degree included angle and 45-degree centerline angle match the geometry required for standard flat-head machine screws and similar fasteners. It fits benchtop drill presses, hand drills, and CNC setups that accept a 1/4-inch straight shank. No pilot is included, so the operator controls hole placement by center-punching or using a drill guide. Intended for use in metal fabrication, HVAC sheet metal work, electrical panel prep, and general maintenance environments.

Key Features

• 90-degree included angle matches standard flat-head fastener geometry
• 3/8-inch head diameter for moderate-size countersink applications
• 1/4-inch straight cylindrical shank fits standard drill chucks and holders
• Single-flute design reduces chatter and provides smooth cutting action
• High-speed steel construction handles general-purpose metal countersinking
• Bright, uncoated finish — no coating to chip or flake during use

Compatibility

Designed as a general-purpose countersink compatible with any drill press, hand drill, or CNC spindle accepting a 1/4-inch straight cylindrical shank.

Installation Notes

Secure the shank firmly in the chuck before operation and confirm the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or lubricant when countersinking harder metals to extend tool life and improve finish quality. Apply steady, moderate feed pressure — excessive downward force can cause chatter or premature edge wear on a single-flute tool. Follow applicable shop safety practices including eye protection and secure workholding.