34mm ER 25 Collet For 4mm Clamping Diameter, 5 µm Runout Accuracy - TECWERK

Reliable clamping accuracy and a compact form factor make this collet a practical choice for precision shops; the combination of 5 µm runout and full-length grip supports repeatable production results. Order the collet directly via Metav Werkzeuge or ask the Metav consultants if further specification is required.

Collet type ER 25/430 E — ER 25 collet, 4 mm clamping diameter (TECWERK)

The Collet type ER 25/430 E is a compact ER 25 collet designed for precision clamping in metalworking and general workshop applications using standard ER collet chucks

• Compatible with ER 25 collet chucks
• Full-length gripping for tool stability
• Runout and repeatability 5 µm accuracy
• Clamping diameter 4 mm, compact L 34 mm

Consistent precision for repeatable machining results

The clamping system is engineered for high repeatability: runout and repeatability of 5 µm ensure that tools remain concentric under repeated changeover, which reduces rework and setup time. Conformance with DIN 6499-B signals compatibility with established workshop standards and simplifies integration into existing tool sets. Such measurable precision converts directly into predictable machining results and lower scrap rates, an advantage in batch production and prototype runs alike.

Strong, full-length clamping improves tool stability

The collet holds tools along the entire clamping length, providing a full-length grip that increases stability and vibration damping during cutting. The design allows clamping on the pilot chamfer where appropriate, enabling secure retention even when the shank engages a guiding taper. The clamping diameter compensation (nominal minus 1.0 mm) permits small diameter bridging without additional adapters, preserving process reliability while maintaining concentricity.

Compact dimensions for practical workshop use

Compact dimensions such as L: 34 mm, D: 26 mm and a clamping bore of 4 mm reduce spindle intrusion and make the item suitable for tight setups. Standardised form and compatibility with ER chucks remove the need for intermediate sizes, streamlining inventory and tool management. The small footprint supports flexible tool configurations on milling heads and drill spindles while maintaining the stability expected from a workshop-grade clamping system.

Practical benefits that support productivity and trust

Standardisation and predictable performance shorten setup routines and support efficient production planning. As a standard ER 25 clamping sleeve, the item helps reduce spare-part varieties and contributes to a clearer tool pool. Metav’s quality filter for the European market ensures that components supplied through Metav Werkzeuge meet consistent expectations—useful when scaling operations or centralising procurement for multiple workshops.

Contact Metav Werkzeuge today for order and technical advice on the TECWERK ER 25/430 E collet and ensure rapid, reliable supply from Emmerich.

Technical data

• Article number: 2000832925NW
• Type: ER 25 collet
• Product: Collet type ER 25/430 E

Facts

• Clamping diameter (d): 4 mm
• Outside diameter (D): 26 mm
• Length (L): 34 mm
• Runout / repeatability: 5 µm
• Clamping diameter compensation: nominal − 1.0 mm

Special features

• According to DIN 6499-B
• Compatible with ER collet chucks
• No intermediate sizes required
• Tools clamped along full clamping length; can be clamped on pilot chamfer
• Suitable for bridging clamping diameters (nominal − 1.0 mm)

FAQ

What level of concentricity can be expected with this collet?
The TECWERK ER 25/430 E collet delivers runout and repeatability of 5 µm, providing the concentricity required for precise milling and drilling operations.

Is the collet compatible with standard ER 25 chucks?
Yes — the clamping sleeve is compatible with standard ER 25 collet chucks and conforms to DIN 6499-B, ensuring interchangeability.

Can tools be clamped on the chamfer or only on the cylindrical shank?
Tools can be clamped along the entire clamping length and may also be secured on the pilot chamfer, offering greater flexibility for different tool geometries.

What are the key dimensions of this collet?
Dimensions: clamping bore 4 mm, outside diameter 26 mm, length 34 mm; SKU 2000832925NW.

Is an intermediate collet size required for non-standard diameters?
No — intermediate sizes are not required; the collet is designed to bridge small diameter differences up to the clamping diameter compensation of nominal − 1.0 mm.

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