Guhring 9039770158750 5/8-11 Unc Spiral Flute Tap

Product Description

The GUHRING 9039770158750 is a spiral flute tap designed for cutting internal threads in blind holes. It produces a 5/8-11 UNC thread to a 2B class of fit and is built from cobalt high-speed steel with a TICN (titanium carbonitride) coating for elevated heat and wear resistance. The 40-degree helix angle evacuates chips upward and out of the hole, reducing the risk of chip packing in blind-hole applications. With an overall length of 3.811 inches and a bottoming chamfer, it threads closer to the bottom of a hole than taper or plug-style taps. Licensed machinists and maintenance technicians install this tap with a standard tap wrench or CNC tapping head.

This tap is suited for threading alloyed steel and unalloyed steel in production and job-shop environments. The bottoming chamfer style makes it the correct choice when full threads are needed near the bottom of a blind hole, such as in fixture plates, machine frames, and structural weldments. Its right-hand flute and right-hand thread orientation match standard UNC fastener conventions. The fast flute style supports higher feed rates where machine tapping cycles demand throughput.

Key Features

• 5/8-11 UNC thread form, 2B class of fit for standard fastener compatibility
• Bottoming chamfer for maximum thread depth in blind holes
• Cobalt HSS construction for heat resistance in alloy steel applications
• TICN coating reduces friction and extends tool life
• 40-degree helix angle promotes reliable upward chip evacuation
• 4 right-hand flutes with fast flute style for efficient cutting action

Compatibility

Designed for threading alloyed steel and unalloyed steel in blind-hole applications where a 5/8-11 UNC bottoming tap with a 2B class of fit is required.

Installation Notes

A licensed machinist or tooling technician should install and operate this tap. Ensure the workpiece is securely fixtured and the correct tap drill diameter for 5/8-11 UNC is used before tapping. Use appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. For CNC applications, confirm spindle speed and feed rate are set for the tap geometry and material being threaded before initiating the cycle.