8mm ER25 Collet With 6.2mm Internal Square For Thread Cutting, 15 µm Runout - TECWERK

Taking advantage of the combination of 15 µm runout accuracy and an internal 6.2 mm square for secure tapping operations ensures reliable thread cutting and consistent tool holding; order the ER 25-GB collet directly via Metav Werkzeuge or consult our team for application advice.

ER 25-GB collet — 8 mm clamping diameter, internal 6.2 mm square (TECWERK)

ER 25-GB collet designed for ER-style chucks; DIN 6499-compliant and optimised for 8 mm tools with a 6.2 mm internal square for tapping

• DIN 6499-compliant design
• Internal 6.2 mm square for tapping
• 8 mm clamping diameter
• Runout accuracy 15 µm

Precision that keeps production predictable

The ER 25-GB collet delivers runout accuracy of 15 µm, a figure that directly reduces vibration and tool wear in high-precision operations. Measured concentricity is crucial when producing threaded components or working at higher spindle speeds; the tight specification helps to preserve cutting edges and maintain dimensional tolerances. The collet’s conformity with DIN 6499 guarantees standardised interfaces with ER chucks, simplifying tool change procedures and ensuring repeatable clamping performance.

Secure torque transmission for tapping and thread cutting

An integrated 6.2 mm internal square provides a positive drive for taps and other thread-cutting tools, preventing slippage under torque and lowering the risk of tap breakage. This functional detail turns the collet into a reliable interface between spindle and tool, improving process stability during threading operations. By using a GB-style internal square, the collet facilitates controlled torque transfer while keeping setup straightforward and maintenance predictable.

Compact dimensions for easy integration and replacement

With a length of 34 mm and an outer diameter indicated as 8 mm, the collet fits standard ER25 systems and requires minimal adapter work for integration. The compact form supports close-packed tool arrangements and quick swaps from the chuck, reducing downtime. Durable geometry and standardised sizing make the component a convenient spare-part option for workshop inventories and machining centres that demand consistent clamping quality.

Contact Metav Werkzeuge to discuss TECWERK ER 25-GB collets and secure 15 µm runout performance for reliable tapping applications

Technical data

• Article number: 2000834964NW
• Type: ER 25-GB
• Manufacturer: TECWERK
• Product type: Collet GB

Core specifications

• Clamping diameter: 8 mm
• Internal square: 6.2 mm
• Length L: 34 mm
• Outer diameter d: 8 mm
• Runout accuracy: 15 µm

Special features

• DIN 6499 compliant
• Internal square for thread cutting
• Suitable for ER tapping and collet chucks
• Packaging unit: 1

FAQ

Is the ER 25-GB collet suitable for tapping operations? Yes. The ER 25-GB collet by TECWERK features an internal 6.2 mm square specifically intended for tapping and thread cutting to reduce slippage and improve torque transmission (SKU 2000834964NW).

What runout can be expected from this collet? The ER 25-GB is specified with a runout accuracy of 15 µm, a level that supports precise machining and helps to extend tool life in repetitive operations.

Which chuck systems is this collet compatible with? This GB collet is designed for standard ER-style chucks and conforms to DIN 6499, ensuring compatibility with ER collet chucks and tapping chucks that accept ER25 components.

What tool sizes does the collet hold and what are its dimensions? The collet clamps 8 mm tools and includes a 6.2 mm internal square for taps; overall length is 34 mm with an outer diameter noted as 8 mm.

Does the ER 25-GB meet industry standards for interchangeability? Yes. The ER 25-GB collet meets DIN 6499 requirements, which promotes interchangeability and predictable performance across compliant ER systems.

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