4mm ER25 Collet With 3mm Internal Square For Thread Cutting, 15 µm Runout - TECWERK

Take advantage of precise runout control and a dedicated internal square for thread cutting to improve tapping consistency and reduce rework. The compact ER25-GB collet combines a 4 mm shank diameter with a 3 mm internal square and a guaranteed runout accuracy of 15 µm, making it a dependable choice for repeatable, high-precision clamping; order via Metav Werkzeuge or consult our specialists for suitability.

Spannzange ER25-GB Spann-D.4mm 4-KT.3mm TECWERK — ER25 collet with 4 mm shank and 3 mm internal square

A Spannzange ER25-GB engineered for thread-cutting applications and compatible with standard ER collet chucks, delivering tight concentricity for demanding workshop use

• ER25-GB with 3 mm internal square
• Runout accuracy 15 µm for consistent results
• Compact length L: 34 mm, shank d: 4 mm

Precision that reduces scrap and saves time

The compact design of this collet ensures repeatable concentricity, which directly reduces scrap rates during thread cutting and tapping operations. Conformity to DIN 6499 and the specified runout accuracy of 15 µm mean tolerances are maintained even under repeated cycles, so processes run with fewer stoppages for inspection or correction. For machining setups where consistent tool engagement and minimal axial runout are critical, the precise geometry of this clamping element supports improved thread quality and lower rejection rates.

Designed for compatibility and straightforward installation

Built to fit standard ER collet chucks, the component features an internal square (3 mm) that facilitates secure torque transmission when cutting threads; this avoids slippage and improves control during tapping. The nominal clamping range 4 mm and the 4 mm shank diameter match common tap shank sizes, enabling quick integration into existing toolholders without additional adapters. Clear dimensional data such as L: 34 mm and d: 4 mm simplify tool selection and reduce setup time, supporting leaner workflow in small-batch and production environments.

Robust small-form factor for reliable workshop use

Despite its compact proportions, the collet offers a stable clamping interface suited to repetitive industrial tasks. The combination of the internal square for thread cutting and the ER-style external profile balances torque transmission with concentric clamping, which helps to protect both taps and workpieces. The concise dimensions contribute to a low-profile tool assembly that is easier to handle in crowded spindles and reduces the likelihood of interference in multi-tool setups. This makes the collet a practical choice for maintenance departments, toolrooms and small-series production where precision and space economy are both important.

For tailored advice on integrating this TECWERK ER25-GB collet into specific tapping or clamping systems, contact Metav Werkzeuge in Emmerich for fast, expert guidance and secure supply — eMail: info@metav-werkzeuge.com | Tel: +49 2822 7131930

Technical data

• Article number: 2000834960NW
• SKU / UID: 2000834960NW
• Type: ER 25-GB
• Label: Spannzange ER25-GB Spann-D.4mm 4-KT.3mm TECWERK
• Product type: Collet GB
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Runout accuracy: 15 µm
• Length: 34 mm
• Shank diameter d: 4 mm
• Internal square: 3 mm
• Clamping range: 4 mm

Special features

• Complies with DIN 6499
• Internal square for thread cutting
• Suitable for ER collet chucks
• Compact, low-profile design
• Intended for repeatable, precision clamping

FAQ

What is the intended application for this collet?
The ER25-GB collet from TECWERK is intended for thread-cutting and tapping operations where an internal square and high concentricity are required.

Which chuck systems is it compatible with?
Compatibility is with standard ER collet chucks; the ER25-GB profile ensures straightforward fitting into ER-style holders.

What accuracy can be expected in terms of runout?
The collet guarantees a runout accuracy of 15 µm, supporting precise, repeatable machining results.

What are the key dimensions to check before ordering?
Important dimensions are L: 34 mm, shank d: 4 mm, internal square 3 mm, and clamping range 4 mm; confirm these against the tool and holder specs.

Is this collet suitable for use with taps?
Yes — the internal square is specifically for secure torque transmission during thread cutting and tapping tasks.

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