Guhring 9048865127000 Spiral Point Tap 1/2-20 Unf

Product Description

The GUHRING 9048865127000 is a spiral point plug tap designed for through-hole threading in steel and similar materials. Built from HSS-E cobalt high-speed steel and finished with GUHRING Ignator coating, this tap delivers extended tool life in demanding production environments. The 1/2-20 UNF thread form is cut with four flutes and a plug chamfer, providing smooth chip evacuation forward through the hole. It covers Class of Fit 2B and 3B, making it suitable for standard and close-tolerance threaded assemblies. The overall length is 3.382 inches with a thread length of 0.787 inches, and the shank diameter measures 0.367 inches.

This tap is intended for right-hand through-hole threading applications in steel workpieces. The spiral point geometry pushes chips ahead of the cutting action rather than backing them out, which makes it well suited for CNC machining centers, drill presses, and production tapping operations where through-holes are the standard configuration. The H4/H5 thread limit designation indicates a controlled oversize tolerance, appropriate for applications requiring reliable fit with externally threaded fasteners in the 1/2-20 UNF series.

Key Features

• HSS-E cobalt substrate for improved heat and wear resistance in steel tapping
• Ignator coating reduces friction and extends tool life between regrinds
• Four-flute spiral point design pushes chips forward through the hole
• Plug chamfer provides a gradual lead-in for consistent thread start
• H4/H5 thread limit supports 2B and 3B Class of Fit requirements
• Right-hand thread direction, no coolant-through required

Compatibility

Designed for through-hole threading applications in steel. Thread form is 1/2-20 UNF, Class of Fit 2B/3B, Series 4886. Verify machine spindle compatibility and tap holder collet size against the 0.367-inch shank diameter before installation.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician familiar with tapping operations and cutting tool handling. Secure the workpiece fully before engaging the tap, and confirm the tapping fluid or cutting oil is appropriate for the workpiece material. Do not reverse the tap under power without confirming the machine is set for reversing cycle; forced reversal can fracture the tool or damage the thread. Inspect the tap for chipping or wear before each use and replace when thread quality degrades.