Guhring 9044072021840 Spiral Flute Tap 2-56 Unc Cobalt

Product Description

The GUHRING 9044072021840 is a cobalt spiral flute tap designed for cutting internal threads in blind holes. It produces a 2-56 UNC right-hand thread with a modified bottoming chamfer, allowing threads to be cut close to the bottom of a hole. The 40-degree helix angle and fast flute style evacuate chips upward, making it well suited for interrupted cuts and tough materials. With a 2B/3B class of fit and H2 thread limit, it delivers consistent tolerance control in production and repair threading operations. Licensed machinists and tool-and-die technicians are the primary users of this tap.

This tap is rated for use in a wide range of workpiece materials including alloy steel, alloy tool steel, free-cutting steel, heat-treated steel, case-hardened steel, structural steel, tool steel, stainless steel, cast iron, ductile iron, malleable cast iron, and aluminum alloys. It is part of the GUHRING Series 4407 and is intended for blind hole threading applications where chip evacuation away from the cutting zone is critical. The oxide coating provides a base level of lubricity and corrosion resistance for general shop use.

Key Features

• 2-56 UNC thread form with H2 thread limit and 2B/3B class of fit for tight tolerance control
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 40-degree right-hand helix angle with fast flute style for efficient upward chip evacuation
• Cobalt construction for increased heat resistance in harder workpiece materials
• Oxide coating for lubricity and basic corrosion protection
• No coolant-through design — suitable for conventional tapping with applied cutting fluid

Compatibility

Designed for blind hole threading in alloy steel, stainless steel, cast iron, and aluminum and non-ferrous materials. Compatible with standard 2-56 UNC tapping applications requiring a 2B or 3B class of fit.

Installation Notes

This tap is installed and operated by machinists using a standard tapping chuck, CNC tapping head, or manual tap wrench rated for the applicable shank diameter. Always apply a suitable cutting fluid for the workpiece material before tapping. Secure the workpiece firmly and ensure the tap enters the hole perpendicular to the surface to avoid tap breakage. Follow applicable shop safety procedures and machine manufacturer guidelines when powering down spindles or securing tooling.