6mm ER25 Collet With 4.9mm Internal Square For Thread Cutting, 34mm Length - TECWERK

Take advantage of precise clamping and tapping compatibility combined with proven DIN 6499 conformity for reliable tooling performance. The collet’s 15 µm runout accuracy and the internal 4.9 mm square for tapping reduce rework and extend tool life—order directly via Metav Werkzeuge or consult our specialists for tailored advice.

ER 25-GB Collet – 6 mm clamping, internal 4.9 mm square (TECWERK)

The ER 25-GB collet provides high-precision clamping for tapping and general ER applications, designed for use in ER-type tap and collet chucks and manufactured to DIN 6499 standards.

• DIN 6499-compliant design
• 15 µm runout accuracy
• Internal 4.9 mm square for tapping
• Fits ER tap and collet chucks

Exceptional precision for repeatable machining results

A focus on measurable accuracy ensures consistent part quality: the collet offers 15 µm runout accuracy, which minimises radial run-out and vibration during rotation. This level of precision translates into improved surface finish and longer tool life, particularly important when performing threading or finishing operations. The compatibility with the ER system maintains concentricity across tools, supporting reliable repeatability in series production.

Built for tapping and secure clamping

The integrated internal square with a 4.9 mm dimension secures taps for reliable thread-cutting operations while the nominal 6 mm clamping diameter ensures firm retention of straight shank tools. This combination reduces the need for additional adapters and shortens tool-change times. The modest overall size with length 34 mm suits compact toolholders and contributes to stable tool engagement, helping to prevent tap breakage and improving process security.

Standards compliance and broad compatibility to simplify procurement

Manufactured in accordance with DIN 6499, the collet fits standard ER tap and collet chucks, reducing inventory complexity and ensuring interoperability across widely used holders. The straightforward specification means procurement can focus on performance metrics—compatibility and precision—rather than bespoke adaptations. For workshops seeking a pragmatic balance of accuracy and logistical simplicity, this GB-style collet streamlines selection and stock management.

Contact Metav Werkzeuge for expert guidance on integrating TECWERK ER 25-GB collets into production and to arrange prompt supply from Emmerich.

Technical data

• Article number: 2000834962NW
• Type: ER 25-GB
• Label: Spannzange ER25-GB Spann-D.6mm 4-KT.4,9mm TECWERK
• Manufacturer: TECWERK

Facts

• Clamping diameter: 6 mm
• Runout accuracy: 15 µm
• Length: 34 mm
• Shank diameter: 6 mm
• Internal square: 4.9 mm
• Packaging unit: 1

Special features

• DIN 6499 standard
• Internal square for tapping operations
• Suitable for ER tap and collet chucks
• High concentricity for precision clamping

FAQ

What tapping shank size is accepted by this collet? The collet accepts taps with an internal square of 4.9 mm, enabling secure holding for standard tapping operations with the TECWERK ER 25-GB collet (SKU 2000834962NW).

Is this collet compatible with standard ER chucks and tap holders? Yes, the ER 25-GB collet is designed for compatibility with ER-type collet chucks and tap holders and is manufactured to DIN 6499 to ensure broad interchangeability.

What level of runout can be expected during operation? The collet delivers a runout accuracy of 15 µm, supporting stable rotation and improved surface finish during threading and finishing tasks.

What are the key dimensions to consider for toolholder fit? Key dimensions include a clamping diameter of 6 mm, overall length of 34 mm, and an internal square of 4.9 mm, relevant when matching the collet to holders and tools.

Can the collet be used specifically for tapping operations? Yes, the ER 25-GB collet is expressly equipped with an internal square for tapping and is suitable for use in ER tap and collet chucks for secure thread-cutting operations.

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