Guhring 9018720300000 Spiral Point Tap M30 X 3.5

Product Description

The GUHRING 9018720300000 is a spiral point tap designed for through-hole threading in metric applications. It cuts an M30 x 3.5 thread profile to a 6H class of fit and meets D8/D9 thread limit specifications. Built from cobalt high-speed steel with a bright finish, it offers added heat resistance and edge retention when working through harder materials. The 4-flute plug chamfer design pushes chips forward ahead of the tap, making it well suited for through-hole operations where chip evacuation is straightforward. With an overall length of 180 mm (approximately 7.09 inches) and a 22 mm (approximately 0.87 inches) shank diameter, this tap fits standard toolholders used by machinists and maintenance technicians in production and job-shop environments.

This tap is intended for through-hole threading in a range of materials including aluminum, non-ferrous metals, stainless steel, and steel. The plug chamfer distributes cutting load across several leading threads, reducing torque demand at entry. It is appropriate for use in CNC machining centers, drill presses, and manual tapping operations where a consistent 6H fit tolerance is required. Coolant-through capability is not included in this configuration. This is a right-hand tap, compatible with standard right-hand tapping attachments and holders.

Key Features

• M30 x 3.5 metric thread profile with 6H class of fit and D8/D9 thread limit
• Cobalt construction provides improved heat and wear resistance compared to standard HSS
• 4-flute spiral point design pushes chips forward for clean through-hole threading
• Plug chamfer distributes entry cutting load across multiple lead threads
• Bright finish with no coating for straightforward re-sharpening in the field
• Right-hand thread direction; compatible with standard tapping equipment

Compatibility

Designed for through-hole threading applications in aluminum, non-ferrous metals, stainless steel, and steel. Fits standard toolholders accepting a 22 mm shank diameter. Part of GUHRING Series 1872.

Installation Notes

This tap should be installed and operated by a qualified machinist or maintenance technician familiar with tapping torque requirements for large-diameter metric threads. Always secure the workpiece and verify spindle alignment before beginning the tapping cycle. Use an appropriate cutting fluid for the material being threaded to extend tool life and protect thread quality. Inspect the tap for wear or chipping before each use, particularly after work in stainless steel or hardened steels.