84mm Synchronised Thread Cutting Chuck ER25-GB With Coolant Feed, ±0.5mm Compensation DIN 69871 - TECWERK

Take advantage of the synchronised compensation and high runout accuracy to secure consistent threads in CNC production; the chuck’s ER25‑GB interface and compatibility with DIN 69871 Form A allow straightforward integration into SK40 spindles. Order directly via Metav Werkzeuge or ask the consultants for specification support.

TECWERK synchronised tapping chuck, DIN 69871 Form A, SK40 – ER25‑GB, M3–M20

The TECWERK synchronised tapping chuck is a precision holder for synchronised tapping on CNC machines, engineered to compensate pitch differences and to handle M3–M20 threads with coolant feed for extended tool life.

• DIN 69871 Form A compatibility
• Compensates synchronisation errors ±0.5 mm
• For thread sizes M3–M20
• ER25‑GB collet interface
• Integrated coolant feed for tool life

Consistent threads through axial compensation and synchronisation

The central benefit of this chuck is its axial length compensation, which bridges small pitch or timing discrepancies between the tapping tool and the machine’s synchronised spindle. Designed to absorb synchronisation errors on both push and pull, the system offers ±0.5 mm of longitudinal correction, reducing tap breakage and rework. By converting potential timing mismatch into controlled axial movement, the holder improves process reliability in high‑mix, high‑precision environments and supports both right‑ and left‑hand threads without additional tool changes.

Rapid CNC integration with secure clamping and standardised interfaces

Integration into conventional machining centres is simplified by adherence to DIN 69871 and a SK40 taper; the ER25‑GB collet interface ensures positive gripping of common tapping tools. The design delivers high clamping force through tensioned tapping collets with an integrated square drive, so tool slippage during torque reversal is minimised. For production planners, this means predictable repeatability and easier changeovers: standard interfaces reduce spindle adaptation time and support consistent cycle‑time planning across batches.

Improved tool life and process stability with coolant and runout control

A built‑in coolant feed helps evacuate chips and cool the cutting edge, extending tool life and maintaining thread quality. The holder’s construction prioritises high runout accuracy, which translates into reduced tool wear and more accurate thread forms, leading to fewer rejects and lower downstream finishing effort. In practice, this reduces maintenance intervals and contributes to a steadier production rhythm, supporting operational efficiency and lower total cost of ownership.

Contact Metav Werkzeuge for tailored technical advice and to secure the TECWERK synchronised tapping chuck for reliable CNC threading solutions.

Technical data

• Article number: 2000834915NW
• Manufacturer: TECWERK
• Product type: synchronised tapping chuck

Facts

• Norm: DIN 69871 Form A
• Collet interface: ER25‑GB
• Outer diameter: 42 mm
• A (length): 84 mm
• Length compensation: -0.5 / +0.5 mm
• Suitable for threads: M3–M20

Special features

• With SK40 taper for direct spindle mounting
• Coolant feed integrated
• Compensates pitch differences of tapping tool and synchronised spindle
• Compensates synchronisation errors on push and pull
• Suitable for right‑ and left‑hand threads
• High runout accuracy
• High clamping force via tensioned tapping collets with integrated square drive

FAQ

What thread sizes can be handled with this chuck?
The TECWERK synchronised tapping chuck is specified for thread sizes M3–M20, covering a broad range of common production threads.

Is the chuck compatible with my CNC machine spindle?
Compatibility is ensured where a SK40 taper and DIN 69871 Form A interface are available; the ER25‑GB collet adapts standard tapping tools to the spindle.

How much axial compensation does the holder provide?
Axial length compensation is ±0.5 mm, allowing the chuck to absorb small synchronisation deviations between tap and spindle.

Can the holder be used for left‑hand threads?
Yes, the design supports both right‑ and left‑hand threads without modification to the holder.

Does the chuck support coolant supply?
The chuck includes an integrated coolant feed to improve chip evacuation and extend tool life during tapping operations.

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