8mm ER40 Collet With 46mm Length, 5 µm Runout, Fits ER Collet Chucks - TECWERK

Take advantage of the combination of precise 5 µm runout, full-length clamping and a compact 46 mm design for reliable tool holding and consistent production results; order the collet via Metav Werkzeuge or consult our technical team for application support.

ER collet type ER 40/472 E – clamping 8 mm (TECWERK)

The ER collet type ER 40/472 E is a precision clamping accessory for ER 40 collet chucks, designed to hold tools securely along the full clamping length and to be used where high runout and repeatability standards are required.

• DIN 6499-B compatibility with ER chucks
• Full-length clamping for stable tool support
• Runout and repeatability 5 µm
• Compact length 46 mm for tight setups

Consistent spindle accuracy for repeatable machining

The ER collet is engineered to deliver consistent spindle accuracy, with a declared runout and repeatability of 5 µm, which reduces tool vibration and improves surface finish. Conformity to DIN 6499-B ensures interchangeability with standard ER 40 systems and simplifies toolholder selection. The specification for clamping diameter bridging (nominal minus 1.0 mm) allows the collet to accommodate slight differences between nominal shank sizes and actual tool diameters, so the clamping interface compensates for small tolerances without the need for intermediary sleeves. This leads to fewer changeover interruptions and a measurable improvement in process stability.

Stable gripping and compact footprint for workshop efficiency

With full-length clamping and the ability to be clamped on the lead chamfer, the design keeps the tool securely supported over its entire gripped length, which extends tool life and lowers scrap rates. The compact dimensions (46 mm length, bore 8 mm, outer diameter 41 mm) make it suitable for congested spindle environments and multi-spindle machines where space is at a premium. Compatibility with ER 40 collet chucks means straightforward integration into existing setups; no intermediate sizing measures are required, enabling faster tool changes and reduced downtime, which improves overall equipment effectiveness.

Practical supply and partner support for seamless procurement

Sourcing the collet through Metav provides more than a component: it offers access to a supplier committed to democratising precision. Metav’s logistics and quality filtering from Emmerich support reliable stock levels and straightforward ordering for production planners and maintenance teams. The Metav approach combines technical competence with a broad product range, making it easier to consolidate supply chains and maintain consistent workshop availability without compromising on quality or traceability.

Contact Metav Werkzeuge for application advice and procurement of TECWERK ER collets; our team in Emmerich is ready to assist by phone or e‑mail to ensure the right fit for the machine and the operation

Technical data

• Article number: 2000832966NW
• Type: ER 40
• Product: ER collet
• Brand: TECWERK
• Packaging unit: 1

Facts

• Clamping diameter: 8 mm
• Runout / repeatability: 5 µm
• Length L: 46 mm
• Bore d: 8 mm
• Outer diameter D: 41 mm
• Clamping diameter bridging: nominal − 1.0 mm

Special features

• DIN 6499-B standard conformity
• Suitable for ER 40 collet chucks
• Full-length clamping
• Can be clamped on lead chamfer
• No intermediate sizes required

FAQ

What clamping diameter does the collet accommodate?
The ER collet clamps a nominal shank of 8 mm, with a clamping diameter bridging allowance of nominal minus 1.0 mm to compensate for slight size variations.

What runout can be expected when using this collet?
The collet delivers a runout and repeatability of 5 µm, giving stable concentricity for precise machining with the TECWERK ER 40/472 E collet.

Is this collet compatible with standard ER 40 chucks?
Yes, the collet is made to DIN 6499-B and is compatible with ER 40 collet chucks, enabling direct use without additional adapters.

Can tools be clamped on the lead chamfer with this collet?
The design permits clamping on the lead chamfer as well as along the full clamping length, providing versatile and secure holding options.

What are the physical dimensions of the collet?
Key dimensions: length 46 mm, bore 8 mm, outer diameter 41 mm; article number 2000832966NW identifies the exact item.

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