M8x1.25mm Threading Die Form B Left-Hand HSS 6g Tolerance, 9mm Height - TECWERK

Take advantage of a durable HSS construction and a Form B closed, pre‑slotted design to produce consistent metric threads; the left‑hand cutting geometry and M8×1.25, tolerance 6g specification ensure reliable reverse-thread assemblies — order the tool directly via Metav Werkzeuge or consult the Metav team for application advice.

TECWERK Round Die Form B M8×1.25mm HSS 6g, left‑hand

The TECWERK Round Die Form B M8×1.25mm HSS 6g, left‑hand is a precision hand die for cutting metric ISO threads in medium‑strength steels and general workshop applications

• HSS cutting material for long tool life
• Form B: closed, pre-slotted design
• Metric ISO thread M8×1.25, tolerance 6g
• Left‑hand cutting for reverse threads

Consistent metric threads for secure assemblies

The primary advantage of this hand die lies in its specification for M8×1.25 threads with tolerance 6g, which supports repeatable fits in mating components. The adherence to DIN 13 for metric ISO threads means thread form and pitch conform to established engineering standards, reducing the need for subsequent rework. By selecting a tool defined to these tolerances, assembly reliability is improved and downstream inspection effort is reduced, making the process more predictable for small series and repair tasks.

Durable HSS construction that reduces downtime

Manufactured from HSS, the round die offers elevated wear resistance compared with standard carbon steel tooling; this durability translates into fewer tool changes and longer service intervals. The material choice allows the die to maintain sharp cutting edges when used on common workshop steels up to approx. 800 N/mm² tensile strength, ensuring consistent thread quality over many cycles. For maintenance, light lubrication and periodic inspection of the cutting surfaces are sufficient to preserve performance and extend tool life.

Closed, pre‑slotted Form B improves chip control and thread quality

The Form B geometry, described as closed and pre‑slotted, balances rigidity with controlled chip evacuation. The closed form supports accurate thread profile generation, while the slots relieve cutting forces and guide chips away from the cutting zone. This combination reduces the risk of galling and improves surface finish on the flank and root of the thread. For workshop operators, the result is fewer instances of re-cutting and cleaner assembly threads after tapping or die‑cutting.

Left‑hand cutting and practical handling for diverse applications

Left‑hand cutting orientation enables the production of reverse threads where required by design or repair tasks, matching assemblies with left‑handed fasteners. With a tool height of 9 mm, the die is compact enough for handheld use in vises and can be integrated into manual thread‑cutting workflows without specialised fixtures. The tool’s construction and metric ISO compliance make it suitable for maintenance, prototyping and small‑batch production in engineering or automotive workshops.

For precision reverse threads, order the TECWERK round die via Metav Werkzeuge and request tailored application support from our consultants at Metav Werkzeuge for a seamless integration into workshop processes.

Technical data

• Article number: 2000867445NW
• UID: 2000867445NW
• Manufacturer: TECWERK

Facts

• Thread: M8×1.25 mm
• Tolerance: 6g
• Height: 9 mm
• Suitable for steels up to approx. 800 N/mm²
• Standard: DIN 13, DIN EN 22568

Special features

• Material: HSS
• Form: B (closed, pre‑slotted)
• Left‑hand cutting
• Metric ISO thread
• For use in manual threading operations

FAQ

What thread does this die produce and to which standard does it conform?
The die produces an M8×1.25 metric ISO thread and conforms to DIN 13; the specification ensures compatibility with standard metric fasteners.

Is the tool suitable for use on hardened steels?
The TECWERK round die is specified for steels up to approx. 800 N/mm² tensile strength; it is not rated for high‑hardness, quenched components.

How does the Form B design affect performance?
Form B’s closed, pre‑slotted design provides rigidity for accurate thread form while the slots improve chip control, yielding cleaner threads and lower rework rates.

Can the die cut left‑hand threads for reversing applications?
Yes, the left‑hand cutting geometry is intended specifically for reverse‑threaded assemblies and repair tasks requiring left‑hand threads.

What basic maintenance keeps the die performing?
Regular light lubrication during use and inspection of the cutting edges will maintain cutting quality; replace the die if wear affects thread profile fidelity.

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