Value Collection SC2190148 Countersink 1-3/4in 90deg 6 Flute

Product Description

The VALUE COLLECTION SC2190148 is a single-end, 6-flute countersink designed for precision chamfering and countersinking operations in metalworking and fabrication environments. Built from cobalt steel with a bright, uncoated finish, this tool delivers the heat and wear resistance needed when working with harder alloys and stainless steels. It features a 1-3/4 inch head diameter, a 90-degree included angle, and a 45-degree centerline angle, making it well suited for standard fastener seat preparation. The 1-inch straight-cylindrical shank fits securely in a wide range of drill press chucks and milling machine collets. Machinists, toolmakers, and industrial maintenance technicians are the primary installers of this tool.

This countersink is intended for right-hand cutting operations on ferrous and non-ferrous metals in shop and production environments. The cobalt steel construction makes it a practical choice for applications involving harder workpiece materials where high-speed steel tooling would wear prematurely. It is used in both manual drill press setups and CNC machining centers where a straight-cylindrical shank is specified. The 6-flute geometry reduces chatter and produces a cleaner, smoother countersink seat compared to single or 3-flute designs, which is especially important when preparing seats for flat-head fasteners requiring flush or sub-flush installation.

Key Features

• 1-3/4 inch head diameter for large-diameter countersink applications
• 90-degree included angle sized for standard flat-head fastener seating
• 6-flute geometry minimizes chatter and improves surface finish
• Cobalt steel construction provides elevated heat and wear resistance over standard HSS
• 1-inch straight-cylindrical shank for broad chuck and collet compatibility
• Bright uncoated finish suitable for general-purpose metal cutting without coating buildup concerns

Compatibility

Designed as an OEM-style replacement or direct-use countersink for metalworking applications requiring a 1-inch straight-cylindrical shank and a 90-degree, 6-flute cutting head.

Installation Notes

This tool is installed by machinists and toolroom technicians in drill press, milling machine, or CNC machining center spindles. Ensure the machine is fully powered down and the spindle is locked before mounting or removing the tool from the chuck or collet. Use appropriate cutting fluid or lubricant for the workpiece material to extend tool life and maintain surface finish quality. Verify shank runout after seating to avoid premature edge wear or an off-center countersink seat.