3.5mm ER25-GB Collet With 2.7mm Internal Square For Thread Cutting, 15µm Runout - TECWERK

Take advantage of the precise runout control and tapping-ready internal square to improve thread quality and reduce rework; compact dimensions ensure straightforward integration into standard ER chucks. Order directly via Metav Werkzeuge or consult the technical team for chuck matching and application advice.

ER25-GB collet — 3.5 mm clamping diameter, 2.7 mm internal square (TECWERK)

ER25-GB collet designed for tapping and precision clamping in standard ER systems, compliant with DIN 6499 and suitable for high-concentricity applications

• DIN 6499 standard with internal square
• Precision runout 15 µm for concentricity
• Clamping diameter 3.5 mm
• Internal square 2.7 mm for tapping shanks

Reliable concentricity for clean, repeatable threads

The ER25-GB collet provides a measurable advantage where thread quality and tool life matter. With a documented runout accuracy of 15 µm, the collet keeps the tool concentric to the spindle, reducing lateral forces during tapping and lowering the risk of broken taps. Compliance with DIN 6499 ensures consistent interfacing with ER chucks, while the compact 34 mm length supports use in limited axial spaces. These properties translate into fewer rejects and less time spent on rework.

Tapping-ready design that fits existing ER systems

The internal square 2.7 mm profile converts a conventional collet into a practical solution for holding tap shanks securely, making the component ideal for intermittent tapping operations and small-batch work. Its 3.5 mm clamping diameter matches commonly used tap sizes and integrates with standard ER system chucks, allowing rapid changeovers and steady cutting conditions. The simple geometry eliminates the need for special adapters while maintaining stable clamping for improved thread accuracy.

Standardisation and supply confidence for the workshop

Choosing this GB collet supports a streamlined tooling strategy: standard interfaces, a compact footprint and DIN conformity reduce inventory complexity and simplify maintenance. Sourcing through Metav leverages a European quality filter and reliable logistics, helping to keep production running. The result is a combination of practical interchangeability and dependable delivery that suits both in-house toolrooms and contract manufacturers.

For TECWERK collets or matching ER chucks contact Metav Werkzeuge for expert advice and tailored recommendations — Metav’s specialists can confirm compatibility and help specify the correct tooling for the application.

Technical data

• Article number: 2000834959NW
• Type: ER 25-GB
• Product: GB collet
• Brand: TECWERK
• Packaging unit: 1

Facts

• Clamping diameter: 3.5 mm
• Internal square: 2.7 mm
• Length: 34 mm
• Runout accuracy: 15 µm

Special features

• DIN 6499 compliant
• Internal square for tapping
• Suitable for ER collet chucks
• Compact design for limited axial space

FAQ

Is this collet suitable for tapping operations?
The ER25-GB collet is designed with an internal square (2.7 mm) specifically to hold tap shanks, making it suitable for tapping where a square drive is required.

What runout can be expected from the collet?
A runout accuracy of 15 µm is specified for the ER25-GB, supporting high concentricity and more consistent thread production.

Which clamping diameter does this collet support?
The collet provides a clamping diameter of 3.5 mm and a length of 34 mm, aligning with common small-diameter tapping and drilling tasks.

Will it fit existing ER chucks?
Yes, the ER25-GB is compatible with standard ER chucks and follows DIN 6499 specifications for straightforward integration.

What is the article number for ordering and reference?
The SKU for this item is 2000834959NW; the product is listed as ER 25-GB by TECWERK for ordering and documentation purposes.

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