G 1/8" x 28 HSS-Co Machine Tap Form C Right-Hand 40° Flank Relief For Blind Holes, DIN ISO 228 - TECWERK

Take advantage of a cobalt-alloyed HSS construction and a 40° right-hand spiral for reliable thread form and efficient chip evacuation; the combination of robust material choice and precise geometry ensures consistent results in blind-hole thread production. Order the machine tap directly via Metav Werkzeuge or consult our specialists for application advice.

Machine tap DIN 5156C G 1/8"×28 HSS‑Co ISO 228 – TECWERK (cobalt HSS, Whitworth G thread)

The Machine tap DIN 5156C G 1/8"×28 HSS‑Co ISO 228 – TECWERK is a purpose-built machine tap for cutting Whitworth pipe threads G in blind holes, designed for use in medium‑strength steels and temper cast iron.

• Cobalt-alloyed HSS for high wear resistance
• Right-hand 40° spiral for efficient chip removal
• Whitworth pipe thread G 1/8" × 28 to DIN ISO 228

Consistent thread performance through precise material and form

Constructed from HSS‑Co, this tool maintains hardness and edge stability at elevated cutting temperatures, which is vital when producing repeated or serial threads. The Form C geometry with flank relief reduces cutting forces and lowers the risk of thread distortion, while the optimised 40° spiral promotes reliable chip control in blind-hole applications. These engineered features translate into fewer tool changes and more predictable process windows on lathes and tapping heads.

Productivity and suitability for common workshop materials

Engineered for blind holes, the tap is suitable for use in steels with tensile strength up to ≈1000 N/mm² and in temper cast iron, offering a practical balance between durability and economy. The Whitworth pipe thread G profile conforms to DIN ISO 228, ensuring compatibility with standard pipe fittings and assemblies. A 7 mm shank provides secure gripping in holders and collets, and the 28 tpi thread form establishes the fine pitch required for G 1/8" connections commonly found in fluid and pneumatic components.

Practical advantages on the shop floor

The tap’s construction delivers reduced rework rates and improved first-pass yields thanks to stable geometry and enhanced wear resistance. For process engineers and workshop managers, the measurable benefits are shorter cycle times and predictable maintenance intervals. Where chip evacuation is critical, the spiral design combined with flank relief minimises clogging in blind threads, supporting a safer and more efficient threading operation. The tool’s specification enables straightforward integration into existing machining routines while keeping compliance with recognised standards.

For reliable supply and technical advice on the TECWERK G 1/8"×28 machine tap, contact Metav Werkzeuge in Emmerich—phone +49 2822 7131930 or eMail info@metav-werkzeuge.com; Metav’s specialists will recommend the best setup for specific machine and material combinations

Technical data

• Article number: 2000867510NW
• Label: Machine tap DIN 5156C G 1/8"×28 HSS‑Co ISO 228 TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1
• UID: 2000867510NW

Facts

• Shank diameter: 7 mm
• Spiral angle: 40°
• Threads per inch: 28 tpi
• Suitable for steels up to: ≈1000 N/mm²

Special features

• Material: HSS‑Co (cobalt-alloyed high-speed steel)
• Form C geometry
• Right-hand spiral
• Flank relief on thread flanks
• Whitworth pipe thread G to DIN ISO 228
• Intended for blind-hole threading

FAQ

What materials can be machined with this tap?
The machine tap is rated for use in medium-strength steels (up to ≈1000 N/mm²) and temper cast iron; the TECWERK HSS‑Co composition supports elevated cutting temperatures typical of such applications.

Is this tap suitable for through holes as well as blind holes?
While primarily designed for blind-hole threading, the TECWERK G 1/8"×28 machine tap can be used in through-hole operations where the thread form and pitch match process requirements.

Which standard does the thread form comply with?
The tap produces Whitworth pipe thread G profiles in accordance with DIN ISO 228, ensuring compatibility with standard fittings and components.

What is the shank size and how should it be held?
The tool features a 7 mm shank, suitable for secure clamping in precision holders or collets used in machining centres and tapping heads.

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