Guhring 9039930190500 Spiral Flute Tap 3/4-10 Unc

Product Description

The GUHRING 9039930190500 is a spiral flute tap designed for blind hole threading in demanding metal cutting applications. Built from powdered metal with a TiN (titanium nitride) coating, it cuts a 3/4-10 UNC right-hand thread to a 2B class of fit. The 40-degree helix angle and fast flute style help evacuate chips efficiently in blind holes, reducing the risk of chip packing. With an overall length of 4.921 inches and a shank diameter of 0.590 inches, this tap is sized for use in standard machine tap holders. It is installed by machinists and tool-and-die technicians working on production or maintenance threading operations.

This tap is intended for blind hole threading in heat treatable hardened steel, high tensile steel, and tool steel. The modified bottoming chamfer allows threading closer to the bottom of a blind hole than a standard plug or taper chamfer, making it well suited for applications where full thread depth near the bottom of the hole is required. The TiN finish extends tool life when cutting tough ferrous materials under normal cutting fluid conditions. Thread limits H5 and H6 are supported, allowing the technician to select appropriate fit depending on tolerance requirements.

Key Features

• Modified bottoming chamfer for threading near the bottom of blind holes
• 40-degree right-hand helix with fast flute style for efficient chip evacuation
• TiN coating for improved wear resistance in hardened and high-tensile steels
• Powdered metal construction for consistent hardness and edge retention
• Cuts 3/4-10 UNC right-hand thread to 2B class of fit
• Supports H5 and H6 thread limits for flexible tolerance control

Compatibility

Designed for blind hole threading in heat treatable hardened steel, high tensile steel, and tool steel. Compatible with standard machine tap holders accepting a 0.590-inch shank diameter. Thread limit H5 and H6 compatible.

Installation Notes

This tap is installed by machinists using a tapping head, CNC machine, or rigid tapping setup. Shut down and lock out the machine before changing or inspecting tooling. Use appropriate cutting fluid for the workpiece material to maintain tool life and thread quality. Verify hole diameter, depth, and alignment before tapping to prevent tap breakage.