Value Collection SC1090040 Countersink 90 Deg 1 Flute Hss

Product Description

The VALUE COLLECTION SC1090040 is a single-flute, 90-degree countersink machined from high-speed steel (HSS) for use in metalworking and general fabrication applications. It accepts a straight cylindrical 1/2-inch shank and produces a 90-degree included angle countersink with a 45-degree centerline angle. The 5/8-inch head diameter makes it well-suited for creating clean, chamfered seat profiles for flat-head fasteners in metal, wood, and composite materials. The bright, uncoated finish is appropriate for standard-duty countersinking operations. Machinists, toolmakers, and skilled fabricators typically select this tool for manual drill press or CNC lathe use where a simple, reliable countersink profile is required.

This countersink is designed for right-hand cutting direction and is used in single-end countersinking operations without a pilot. It is suited for residential shop, commercial machine shop, and light industrial environments. Common applications include deburring drilled holes and producing fastener seat geometry in ferrous and non-ferrous metals as well as plastics and hardwoods. It does not include a pilot guide, so proper center alignment of the existing pilot hole is required before use.

Key Features

• 90-degree included angle and 45-degree centerline angle for standard flat-head fastener seating
• Single-flute design provides smooth cutting action and reduces chatter on manual equipment
• High-speed steel construction offers durability across a range of workpiece materials
• Straight cylindrical 1/2-inch shank fits standard drill chucks and collet holders
• 5/8-inch head diameter accommodates common countersink sizes for flat-head fasteners
• Bright, uncoated finish — no coating to chip or peel during standard-duty use

Compatibility

Designed as a standard-duty replacement or supplemental countersink for drill presses, lathes, and milling machines equipped with a 1/2-inch chuck or collet capable of accepting a straight cylindrical shank.

Installation Notes

Installation is performed by machinists or skilled fabricators. Secure the straight cylindrical shank firmly in a properly sized chuck or collet before operation. Ensure the workpiece is clamped securely and the pilot hole is centered before applying the countersink. Use appropriate cutting fluid for ferrous metals to extend tool life and improve finish quality.