Value Collection SC10100020 Countersink 100 Deg Hss

Product Description

The VALUE COLLECTION SC10100020 is a single-flute, high-speed steel countersink designed for creating clean, chamfered seat profiles in metal and other materials. Built with a 100-degree included angle and a 50-degree centerline angle, it produces consistent, accurate countersinks suited to flat-head fastener applications. The straight-cylindrical shank measures 1/4 inch in diameter for direct chuck mounting, and the head diameter is 5/16 inch. The bright, uncoated finish is standard for general-purpose HSS tooling. No pilot is included. Machinists, tool-and-die workers, and maintenance technicians install this tool in drill presses, lathes, and hand-held power drills.

This countersink is suited for general countersinking operations in light to medium shop and maintenance environments. Its single-flute geometry reduces chatter and produces a smooth seat surface, making it a practical choice for deburring and chamfering operations on ferrous and non-ferrous materials. The compact head size and standard 1/4-inch shank make it compatible with common drill chucks and quick-change holders found in most production and repair setups.

Key Features

• 100-degree included angle for flat-head fastener countersinking
• Single-flute design reduces chatter and promotes clean finishes
• High-speed steel construction for durability across general shop use
• 1/4 inch straight-cylindrical shank fits standard drill chucks and collets
• Bright, uncoated finish — no coating buildup affecting dimensional accuracy
• Right-hand cutting direction for standard clockwise-rotation tooling

Compatibility

Designed as a general-purpose countersink for use in drill presses, CNC machines, lathes, and hand-held power drills equipped with a 1/4-inch or larger chuck or collet. Suitable for countersinking flat-head fastener holes in metal, wood, and plastics.

Installation Notes

Install in a standard drill chuck or collet, ensuring the shank is fully seated and the chuck is tightened securely before operation. Set spindle speed appropriate to the workpiece material — lower speeds are recommended for harder metals to prevent premature wear on the HSS cutting edge. Secure the workpiece firmly before engaging the tool. Inspect the cutting flute for wear or chipping before each use and replace the tool if the edge is degraded.