Guhring 9039220111130 Spiral Flute Tap 7/16-14 Unc

Product Description

The GUHRING 9039220111130 is a spiral flute tap designed for blind hole threading in ferrous materials, including alloyed and unalloyed steels. Built from cobalt high-speed steel with a TiN (titanium nitride) coating, it delivers extended tool life in demanding tapping applications. The modified bottoming chamfer allows threading close to the bottom of a blind hole, making it the right choice when full thread depth near the floor is required. With a 40-degree helix angle and fast flute style, chips are efficiently evacuated upward out of the hole during the cut. A 2B class of fit and H5/H6 thread limit ensure threads meet standard tolerance requirements for general mechanical assemblies.

This tap is suited for production and maintenance machining environments where blind hole tapping of 7/16-14 UNC threads is performed in steel workpieces. The right-hand flute and right-hand thread configuration covers the most common tapping setup on manual machines, CNC machining centers, and drill presses. It is typically installed and used by machinists, toolroom technicians, and maintenance mechanics. Coolant-through is not supported, so flood or brush-applied cutting fluid is the standard approach with this tool.

Key Features

• Modified bottoming chamfer for threading close to the bottom of blind holes
• Cobalt HSS construction for improved heat and wear resistance in steel applications
• TiN coating reduces friction and extends tool life in abrasive materials
• 40-degree helix angle with fast flute style for efficient chip evacuation in blind holes
• H5/H6 thread limit and 2B class of fit for standard tolerance mechanical threads
• Right-hand thread, right-hand flute for conventional tapping setups

Compatibility

Designed for blind hole threading of 7/16-14 UNC threads in alloyed steel and unalloyed steel workpieces. Compatible with standard tap holders and tapping heads that accept a 0.323-inch shank diameter with a 0.242-inch square drive.

Installation Notes

Tapping should be performed by a qualified machinist or toolroom technician using appropriate cutting fluid for steel. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the work surface before beginning the cut. Confirm the tap holder or chuck matches the shank and square dimensions of this tool before use. When tapping blind holes, set depth stops carefully to avoid bottoming the tap under power.