3.5mm ER16 Collet With 2.7mm Internal Square For Threading, 15 µm Runout - TECWERK

Take advantage of the combination of precision runout control, DIN-compliant design and a built-in internal square for tapping to streamline threading operations. Order the collet directly via Metav Werkzeuge or consult our specialists for technical clarification.

TECWERK ER16-GB Collet (3.5 mm / 2.7 mm square)

The TECWERK ER16-GB Collet is a compact ER-GB clamping sleeve designed for precise tapping and secure holding in ER collet chucks.

• Type ER-GB with DIN 6499 internal square
• Suitable for tap holders and ER collet chucks
• Runout accuracy 15 µm
• Precise clamping: 3.5 mm bore, 2.7 mm square

Precision that keeps tapping accurate

The ER-GB variant is engineered for tight tolerances and consistent results. With a declared runout accuracy of 15 µm, the clamping sleeve ensures minimal wobble during rotation, which reduces thread pitch errors and extends tool life. The 3.5 mm clamping diameter and the compact 27.5 mm length combine to provide a steady interface between spindle and tap, making the assembly suitable for production environments where repeatable threading quality is required.

Standard compliance and compatibility for easy integration

Compliant with DIN 6499, this collet offers reliable interchangeability and predictable behaviour across systems that accept ER-series tooling. The built-in internal square (2.7 mm) permits direct drive of taps in dedicated tap holders, avoiding improvised adapters and maintaining concentricity. Compatibility with standard ER collet chucks and tap holders simplifies logistics and reduces changeover time on multi-shift shop floors.

Practical benefits for workshop efficiency

Because the sleeve combines compact dimensions with standardised mounting, it supports fast tool changes and consistent clamping forces, which contribute to higher uptime and fewer rejected parts. The ER-GB design reduces the need for specialised tooling by enabling tapping operations directly from the collet, helping to streamline tooling inventories and simplify process planning in both maintenance and small-batch production contexts.

Choose the TECWERK ER16-GB collet for precise tapping performance and contact Metav Werkzeuge for supply and tailored technical advice

Technical data

• Article number: 2000834954NW
• Type: ER 16-GB
• Product: Collet GB
• Manufacturer: TECWERK
• Packaging unit: 1

Core specifications

• Clamping range: 3.5 mm
• Square (internal): 2.7 mm
• Length L: 27.5 mm
• Diameter d: 3.5 mm
• Runout accuracy: 15 µm

Special features

• DIN 6499 compliance
• Internal square for tapping
• Suitable for tap holders and ER collet chucks
• ER-GB type

FAQ

What applications suit this ER-GB collet best?
The ER-GB collet is designed for tapping and secure clamping in ER collet chucks; the internal square makes it particularly suitable for driven tapping operations.

Is the runout accuracy sufficient for fine-thread tapping?
With a specified runout accuracy of 15 µm, the collet provides the concentricity required for accurate thread form and reduced tool wear in many fine-thread applications.

Which tools are compatible with this collet?
This ER-GB collet fits standard ER collet chucks and is compatible with dedicated tap holders that accept an internal square drive.

What do the 3.5 mm and 2.7 mm dimensions refer to?
The 3.5 mm figure is the clamping bore, while the 2.7 mm measure indicates the internal square across flats used for engaging tap drives.

Can this collet be used in high-speed machining?
The ER-GB design and DIN 6499 conformity support stable clamping; suitability for specific spindle speeds depends on the machine setup and the tap manufacturer's recommendations.

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