14mm ER25 Collet, 34mm Length, 5 µm Runout Accuracy - TECWERK

High-precision clamping with reliable repeatability and full-length tool support ensures consistent machining results; the ER 25 collet delivers 5 µm runout accuracy and secure holding over the entire clamping length, reducing setup time and scrap. Order the collet directly via Metav Werkzeuge or contact our consultants for application advice.

TECWERK ER 25 Collet (Type ER 25/430 E) — 14 mm clamping diameter, DIN 6499‑B

The TECWERK ER 25 Collet (Type ER 25/430 E) is a precision ER collet designed for secure clamping of 14 mm tool shanks in ER 25 collet chucks, suitable for production and workshop environments

• Precision runout ≤ 5 µm
• Clamping diameter 14 mm
• Holds tools along full clamping length
• Compatible with ER 25 collet chucks

Reliable precision for demanding machining

The ER 25 collet is manufactured to DIN 6499‑B, delivering a runout and repeatability of 5 µm, which translates into noticeably better surface finish and reduced tool wear in high-precision operations. Such tolerance stability ensures that concentricity is maintained across repeated setups, helping to lower scrap rates and increase first-pass yield. The standardised specification also simplifies quality documentation and process validation in industrial environments.

Secure holding along the entire clamping length

This clamping sleeve holds cutting tools along the full clamping length, which reduces the risk of axial or radial slip during operation and improves dynamic stability at higher spindle speeds. The ability to clamp on the guiding chamfer further enhances versatility: shorter shanks or slightly chamfered tools remain securely seated, so changeover is faster and fixturing becomes more predictable. The result is consistent cutting performance and lower tool-change downtime.

Compact dimensions and straightforward compatibility

With compact external and internal dimensions — L: 34 mm, d: 14 mm, D: 26 mm — the collet fits seamlessly into standard ER 25 chucks without the need for intermediate adapters. The collet permits a clamping diameter bridging of nominal −1.0 mm, meaning it can accommodate small deviations in tool shank diameter without requiring a secondary size, which simplifies inventory and reduces the number of items held in stock. Compatibility with common ER systems ensures straightforward integration into existing tooling setups.

Designed for efficient workshop and production use

Engineered for repeatable performance, the collet supports streamlined workflows in both single-machine shops and production lines. The ER 25 geometry and DIN conformity reduce decision time for procurement and make inventory management easier, while its robust clamping behaviour supports longer uninterrupted runs. For maintenance and reconditioning, the standard format allows easy replacement, keeping machines productive and maintenance cycles predictable.

For secure, repeatable clamping choose the TECWERK ER 25 collet and contact Metav Werkzeuge for prompt supply and technical guidance — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 2000832935NW
• Type: ER 25
• Product: ER collet
• Brand: TECWERK

Facts

• Clamping diameter: 14 mm
• L: 34 mm
• d: 14 mm
• D: 26 mm
• Runout/repeatability: 5 µm
• Clamping diameter bridging: nominal −1.0 mm

Special features

• Standard: DIN 6499‑B
• Compatible with ER collet chucks
• Tools held along full clamping length
• Can be clamped on guiding chamfer
• Packaging unit: 1

FAQ

What runout tolerance can be expected from this collet?
The TECWERK ER 25 collet (SKU 2000832935NW) offers a runout and repeatability of 5 µm when used with a correctly mounted ER 25 chuck and properly prepared toolholders.

Is the collet compatible with standard ER 25 chucks?
Yes — the collet is made to the ER 25 specification and is compatible with ER 25 collet chucks conforming to DIN 6499‑B.

Can tools be clamped on the chamfer or only on the cylindrical shank?
The collet is designed so that tools can be held along the full clamping length and may also be clamped on the guiding chamfer for shortened or chamfered shanks.

What are the key dimensions to check before ordering?
Check the essential dimensions: L 34 mm, d 14 mm, D 26 mm, and the clamping diameter 14 mm; the collet allows bridging down to nominal −1.0 mm.

Which standard does this collet conform to?
This collet conforms to DIN 6499‑B, ensuring standardised interface and interchangeability with ER 25 systems.

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