8mm ER25 Collet 34mm Length Nominal Minus 1.0mm Clamping Range, DIN 6499-B - TECWERK

Reliable, precise clamping for repeatable machining: the ER 25 collet combines DIN 6499‑B compatibility, full‑length tool holding and a tight runout of 5 µm, delivering consistent surface quality and reduced rework; order the collet directly via Metav Werkzeuge or ask our consultants if needed

Collet type ER 25/430 E — ER 25 collet, 8 mm clamping diameter (TECWERK)

Collet type ER 25/430 E provides secure clamping for ER 25 collet chucks in general machining applications, optimised for consistent concentricity and fast changeovers

• DIN 6499-B compatible design
• Full-length holding of tools
• Runout and repeat accuracy 5 µm
• Clamping diameter 8 mm, length 34 mm

Consistent concentricity for better surface quality

The ER collet is engineered to maintain tight concentricity, with a specified runout and repeat accuracy of 5 µm. This level of precision reduces vibration, improves tool life and delivers a more consistent surface finish on the machined part. Compatibility with DIN 6499‑B ensures interchangeability with standard ER 25 chucks, so set‑ups are repeatable and less prone to error. For production environments where repeatability matters, the measurable improvement in process stability is an immediate operational benefit.

Fast set-up and secure gripping to reduce cycle time

Designed for straightforward integration, the clamping sleeve permits full‑length holding of tools, which spreads clamping forces along the tool shank and improves stability under load. The collet’s clamping diameter 8 mm, with overall L: 34 mm and D: 26 mm, keeps installation and removal simple and predictable. The feature described as span bridging (nominal minus 1.0 mm) allows the collet to compensate for slight size variations without intermediate spacers, reducing set‑up steps and lowering the risk of incorrect seating during tool changes.

Practical use and machining contexts

This ER 25 item is intended for use in standard ER collet chucks for general machining tasks where reliable gripping and concentricity are required. The geometry allows the tools to be held on the guiding chamfer as well as along the full clamping length, which is useful for short tool overhangs and limited clamping surfaces. The simple, standards‑based design supports quick tool swaps in milling, drilling and reaming operations, improving throughput without introducing complex handling procedures.

Why supply through Metav supports production reliability

Sourcing this TECWERK ER 25 collet via Metav adds a layer of procurement confidence: a European stock point in Emmerich acts as a quality filter and ensures reliable fulfilment. Metav’s experience as a precision partner, a broad catalogue covering workshop needs and an established customer base underline dependable supply and technical competence. For buyers seeking predictable delivery and traceable product specifications, this route reduces supplier complexity and supports consistent workshop performance.

For expert recommendations and reliable supply of TECWERK ER 25 collets, contact Metav Werkzeuge for tailored advice and fast delivery from Emmerich

Technical data

• Article number: 2000832929NW
• Type: ER 25
• Product: ER 25 collet
• Packaging unit: 1

Facts

• Clamping diameter (d): 8 mm
• Length (L): 34 mm
• Outer diameter (D): 26 mm
• Runout / repeat accuracy: 5 µm
• Span bridging: nominal minus 1.0 mm

Special features

• Compatible with DIN 6499‑B
• Fits ER collet chucks
• No intermediate sizes required
• Tools held along entire clamping length
• Can be clamped on the guiding chamfer
• Runout and repeat accuracy: 5 µm

FAQ

What chuck type is this collet compatible with? This collet is compatible with ER 25 collet chucks and follows DIN 6499‑B compatibility for standardised interchangeability.

What does the 5 µm runout specification mean in practice? A runout of 5 µm indicates the maximum deviation from true rotation; the TECWERK ER 25 collet maintains this tolerance to support consistent tool life and surface finish.

Can the collet clamp tools on the chamfer as well as the shank? Yes, the design permits clamping on the guiding chamfer and along the full clamping length, which is useful for short tool overhangs.

What is the span‑bridging capability of this collet? The collet bridges tool size variations up to nominal minus 1.0 mm, allowing secure clamping without the need for intermediate shims.

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