Value Collection SC1090200 Countersink 90 Degree Hss

Product Description

The VALUE COLLECTION SC1090200 is a single-flute countersink designed for right-hand cutting in metal fabrication and machining applications. Built from high-speed steel (HSS) with a bright uncoated finish, this tool produces clean, accurately angled seats for flat-head fasteners. The included angle measures 90 degrees with a centerline angle of 45 degrees, a 2-inch head diameter, and a 3/4-inch straight-cylindrical shank. It weighs 1.46 pounds. Machinists and tool-and-die professionals use this countersink in drill presses, milling machines, and hand-held drilling equipment where precise chamfering and fastener-seat prep are required.

This countersink is suited for countersinking operations on ferrous and non-ferrous materials where a 90-degree seat angle is the standard requirement. The single-flute geometry provides a smooth cutting action and reduces chatter on softer metals. The 3/4-inch straight-cylindrical shank fits standard drill chucks and collet holders of the same bore size. No pilot is included, so the operator controls centering. The tool ships as a single unit with no assembly required.

Key Features

• 90-degree included angle and 45-degree centerline angle for standard flat-head fastener seats
• Single-flute design reduces chatter and provides smooth cutting action
• High-speed steel construction provides durability across ferrous and non-ferrous materials
• Bright uncoated finish — no coating buildup to affect dimensional accuracy
• 3/4-inch straight-cylindrical shank for compatibility with standard drill chucks and collet holders
• 2-inch head diameter allows countersinking for larger fastener applications

Compatibility

Designed as an OEM-style replacement or direct-use countersink for machining setups requiring a 3/4-inch straight-cylindrical shank and a 90-degree single-flute HSS cutting head.

Installation Notes

Installation is performed by machinists and tooling professionals. Secure the 3/4-inch shank firmly in a drill chuck or collet holder before use, and ensure the workpiece is clamped or fixtured to prevent movement during cutting. Power down the machine completely before changing or seating the tool. Do not exceed the recommended RPM range for the material being machined, and apply cutting fluid as appropriate for the workpiece material to extend tool life.