25mm G 1" x 11 HSS-Co Machine Tap Form C Nitride Vapourised Whitworth G Thread DIN ISO 228 - TECWERK

Benefit from the combination of HSS‑Co construction and a vapourised surface finish for improved wear resistance and longer tool life; the tap is engineered for Whitworth pipe thread G 1"×11 and blind‑hole applications in heat‑resistant and stainless steels. Order the item directly via Metav Werkzeuge or consult the sales team for specification checks and supply details.

Machine thread tap DIN 5156C VA G 1 inch × 11 HSS‑Co, vapourised — TECWERK

A machine thread tap DIN 5156C VA G 1 inch × 11 HSS‑Co designed for forming Whitworth pipe threads in blind holes and for machining hard, heat‑resistant steels under demanding workshop and production conditions

• HSS‑Co construction for high wear resistance
• Vapourised surface finish for extended tool life
• Right‑hand 40° spiral, flanks relieved
• For Whitworth pipe thread G 1" × 11, blind holes

Precision threading for demanding materials

The tap is manufactured from HSS‑Co, a cobalt‑alloy high‑speed steel that retains hardness at elevated temperatures and improves resistance when cutting hard‑to‑machine materials. As a Form C / Type VA tool, it is optimised for long‑run performance and stable geometry, which reduces the frequency of regrinding and tool changeovers. The use of a cobalt‑enhanced substrate ensures consistent thread form in materials with higher tensile strength, translating into reliable joint integrity and fewer rejects in serial production.

Consistent performance and extended tool life

A vapourised surface combined with nitriding produces a hard, low‑friction layer that reduces flank wear and improves chip flow. The tap’s right‑hand 40° spiral and flanks relieved profile aid chip control and reduce cutting forces, notably in interrupted cuts and sticky alloys. Together these features lower torque peaks and the risk of tap breakage, providing measurable gains in process stability and less downtime for tool changes — a clear efficiency advantage in batch and continuous machining environments.

Built for Whitworth pipe threads and blind‑hole tapping

Engineered specifically for Whitworth pipe thread G 1"×11 in accordance with DIN ISO 228, the tool produces the standard pipe thread form required for pressure‑tight connections. The geometry and spiral direction make it particularly suitable for blind holes, where controlled chip evacuation and conservative cutting action are essential to avoid tool seizure. This combination of standards compliance and practical design ensures compatibility with common pipe fittings and makes the tool an appropriate choice for HVAC, plant construction and hydraulic assembly tasks.

Workshop compatibility and handling advantages

With a shank Ø 25 mm, the tap is intended for secure clamping in machine tool holders and compatible spindles, enabling robust torque transmission and concentric accuracy. The single‑unit packaging reflects workshop convenience for immediate replacement needs. Identification is simplified by the blue ring marking and the vapourised finish, which also aids inspection and sorting. For production planners, the tool’s specification supports predictable service intervals and straightforward inventory management.

Contact Metav Werkzeuge for tailored technical advice or to secure the TECWERK machine thread tap (DIN 5156C VA, G 1"×11, SKU 2000867572NW); the Metav specialists in Emmerich will provide supply clarification and specification support

Technical Data

• Article number: 2000867572NW
• Brand: TECWERK
• Packaging unit: 1

Facts

• Shank diameter: 25 mm
• Thread: G 1" × 11 (11 tpi)
• Spiral angle: 40°
• Suitable for tensile strength: > 850 N/mm²

Special features

• Material: HSS‑Co
• Form/Type: Form C / Type VA
• Surface: nitrided and vapourised
• Identification: blue ring
• Geometry: flanks relieved
• Application: Blind holes, Whitworth pipe thread per DIN ISO 228
• Suitable materials: stainless, acid‑ and heat‑resistant steels

FAQ

Which thread standard does this tap produce?
The TECWERK machine thread tap DIN 5156C VA G 1"×11 (SKU 2000867572NW) produces Whitworth pipe thread in accordance with DIN ISO 228.

Is this tool suitable for blind‑hole tapping?
Yes, the TECWERK DIN 5156C VA tap is designed for blind holes, with a 40° right‑hand spiral and relieved flanks to aid chip removal and reduce breakage risk.

Which materials can be machined with this tap?
This tap is suitable for hard‑to‑machine materials, including stainless, acid‑ and heat‑resistant steels with tensile strength above 850 N/mm², as specified for the TECWERK tool.

What is the shank size and how should it be clamped?
The TECWERK tap has a shank Ø 25 mm and should be clamped in a suitably sized holder or spindle collet to ensure concentric clamping and torque transmission.

What surface treatment does the tool have and what benefit does it provide?
The TECWERK tool features a nitrided and vapourised surface finish, which reduces friction, improves wear resistance and helps to extend tool life under heavy‑duty cutting conditions.

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