20mm G 3/4" x 14 HSS-Co Machine Tap Form C 40° Right-Hand Relief, For Blind Holes, ISO 228 - TECWERK

Reliable thread production is achieved through the combination of HSS‑Co construction, a Whitworth G 3/4" x 14 thread form and the right‑hand 40° spiral geometry, delivering consistent results in steels up to 1000 N/mm²; order the TECWERK machine tap directly via Metav Werkzeuge or consult the specialists for application support.

Machine tap DIN 5156C G 3/4" x 14 HSS‑Co (ISO 228) — TECWERK

The Machine tap DIN 5156C G 3/4" x 14 HSS‑Co (ISO 228) is a right‑hand spiral pipe‑thread tap designed for forming Whitworth G threads in blind holes and medium‑strength steels.

• HSS‑Co cobalt steel for extended tool life
• Whitworth G 3/4" x 14 pipe thread
• Right‑hand 40° spiral, Form C flanks honed
• For blind holes; works in steels up to 1000 N/mm²

Consistent thread quality for industrial production

Built from HSS‑Co, this tapping tool prioritises wear resistance and dimensional stability, which translates into repeatable thread quality across production runs. Compliance with DIN ISO 228 ensures that the produced pipe threads match established Whitworth standards, simplifying assembly and reducing rework. The combination of a hardened cobalt matrix and honed flank geometry results in controlled cutting behaviour and improved surface finish, making the component threads suitable for sealed pipe connections and mechanical fittings.

Reliable performance in demanding materials and blind holes

The tap is configured in Form C with a 40° spiral, a geometry that promotes chip control during tapping operations, particularly in blind‑hole threading. It is specified for use in steels up to approximately 1000 N/mm² and in temper‑cast iron, which provides clear guidance for material selection on the shop floor. Because the design is optimised for blind holes, chip evacuation and breakage risk are reduced, enhancing process reliability and lowering scrap rates for internal thread production.

Practical handling and integration benefits

A 20 mm shaft provides a rigid connection to common holders and reduces run‑out during machine tapping, supporting consistent thread form and longer tool life. The honed flanks contribute to smoother engagement and less back‑taper on the thread, which benefits sealing surfaces. From a workflow perspective, the robust geometry and standardised thread form mean fewer tool changes and faster setup times in batch production, improving overall throughput while maintaining high quality.

For applications requiring dependable Whitworth pipe‑threading performance, opt for the TECWERK G 3/4" x 14 HSS‑Co machine tap — procure through Metav Werkzeuge for reliable supply from Emmerich and expert application advice; email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 2000867514NW
• Product: Machine tap DIN 5156C G 3/4" x 14 HSS‑Co ISO 228
• Manufacturer: TECWERK
• Package unit: 1

Core data

• Thread: G 3/4" x 14 TPI
• Shank diameter: 20 mm
• Material application: steels up to approx 1000 N/mm²
• Spiral: right‑hand 40°
• Standard: DIN ISO 228

Special features

• Material: HSS‑Co
• Form: C
• Flanks honed
• For blind holes
• Whitworth pipe thread

FAQ

What thread form does the tap produce?
The tap produces a Whitworth pipe thread to ISO 228, specifically G 3/4" x 14, suitable for standard pipe fittings and sealed connections.

Which materials can be machined with this tap?
The TECWERK tap is suitable for steels up to approximately 1000 N/mm² and for temper‑cast iron, making it appropriate for many industrial applications.

Is the tool suitable for blind‑hole threading?
Yes — the right‑hand 40° spiral and honed flanks are designed to aid chip control in blind holes, reducing the likelihood of chip jamming and breakage.

What is the shank size and how does it affect clamping?
The tool has a 20 mm shank diameter, providing a rigid interface with standard toolholders to minimise run‑out and maintain thread accuracy.

Which standard does the product comply with?
The tap conforms to DIN ISO 228 for Whitworth pipe threads, ensuring compatibility with established fittings and gauges.

Manufacturer / Responsible: NORDWEST Handel AG, Robert‑Schuman‑Straße 17, 44263 Dortmund