7mm ER25 Collet Precision ER Collet 34mm Length, 5µm Runout - TECWERK

The combination of DIN 6499‑B conformity, 5 µm runout accuracy, and full-length tool retention ensures consistently accurate clamping and reduced setup complexity; order the ER 25/430 E collet directly via Metav Werkzeuge or consult Metav's experts for specification support.

ER 25/430 E Collet (ER 25) – 7 mm Clamping Diameter, TECWERK

The ER 25/430 E collet is a precision clamping sleeve for ER 25 collet chucks, engineered for accurate tool holding in milling and machining operations.

• Conforms to DIN 6499‑B
• Full-length tool retention
• 5 µm runout accuracy
• 7 mm bore · L 34 mm · D 26 mm

High-precision clamping that protects part tolerances

The 5 µm runout and repeatability specification translate into measurable quality gains on the shop floor: less vibration, tighter concentricity, and fewer rejects. Conformity with DIN 6499‑B guarantees dimensional interchangeability across suppliers and collet chucks, which simplifies procurement and reduces the risk of mismatched components. For operations where dimensional tolerances and surface finish matter, such repeatability supports higher spindle speeds and consistent tool performance.

Consistent retention for uninterrupted production

Designed to grip tools over the entire clamping length, the clamping sleeve provides full-length retention, so the tool is held securely even when clamped on the guiding chamfer. This reduces axial movement during cutting, which improves tool life and lowers rework rates. The absence of required intermediate sizes streamlines inventory and setup routines, enabling faster changeovers and a more reliable production flow—advantages that feed directly into throughput and uptime.

Clear technical compatibility and compact dimensions

Compatibility with ER 25 systems is explicit: the collet is intended for standard ER 25 chucks and follows recognised dimensional norms. Key dimensions are 7 mm clamping diameter, L 34 mm overall length, and D 26 mm outer diameter, offering a compact form that suits confined toolholders. The design allows bridging of clamping diameters up to nominal minus 1.0 mm, reducing the need to stock multiple adjacent sizes and giving flexibility for slight diameter variations in tools.

Practical benefits for workshop logistics and quality

The simple, standardised design reduces complexity in both purchasing and storage while supporting precise machining results. Holding tools across the entire clamping length and permitting clamping on the guiding chamfer contribute to stable cutting conditions and predictable maintenance intervals. Backed by Metav's role as a quality filter for the European market, the collet is presented as part of a dependable supply chain with experienced technical advice available for integration into existing toolholding systems.

For precise ER 25 toolholding choose the TECWERK ER 25/430 E collet and contact Metav Werkzeuge in Emmerich for order or specification advice at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 2000832928NW
• Type: ER 25 collet
• Label: ER 25/430 E collet, clamping diameter 7 mm, TECWERK
• Manufacturer: TECWERK

Facts

• Clamping diameter: 7 mm
• Overall length (L): 34 mm
• Inner bore (d): 7 mm
• Outer diameter (D): 26 mm
• Runout / repeatability: 5 µm
• Bridging capacity: nominal minus 1.0 mm

Special features

• Conforms to DIN 6499‑B
• Fits ER collet chucks
• Full-length tool retention
• Can be clamped on the guiding chamfer
• No intermediate sizes required

FAQ

What level of runout and repeatability can be expected?
The ER 25/430 E collet offers a runout and repeatability of 5 µm, ensuring high concentricity for demanding machining tasks.

Is this collet suitable for standard ER 25 chucks?
Yes, the collet is designed for ER 25 collet chucks and conforms to DIN 6499‑B for consistent interchangeability.

Can the collet clamp tools smaller than the nominal 7 mm?
The nominal clamping diameter is 7 mm and the collet can bridge clamping diameters up to nominal minus 1.0 mm, reducing the need for adjacent sizes.

What are the key dimensions and the article number?
Key dimensions: L 34 mm, d 7 mm, D 26 mm. Article number / SKU: 2000832928NW.

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