4.5mm ER25-GB Collet With 3.4mm Internal Square For Thread Cutting, 15µm Runout - TECWERK

Take advantage of the combination of DIN 6499 compatibility, an internal 3.4 mm square for secure thread-cutting engagement and a precise 15 µm runout, ensuring reliable clamping performance in repetitive operations — order the collet directly via Metav Werkzeuge or consult our specialists for application advice.

ER 25-GB collet — ER 25-GB collet with 4.5 mm clamping diameter and 3.4 mm internal square (TECWERK)

The ER 25-GB is a compact collet manufactured to DIN 6499, designed for use with ER collet chucks and thread-cutting chucks where a secure internal square is required for driving thread-cutting tools

• DIN 6499 compatibility for ER collet chucks
• Internal 3.4 mm square for thread-cutting tools
• Precise 15 µm runout accuracy
• Clamping diameter 4.5 mm, length 34 mm

Consistent runout for predictable machining results

A core advantage of this collet is its runout 15 µm, which translates directly into repeatable hole positions and consistent tool life. Manufactured to the DIN standard, the component offers a defined interface for ER systems and helps to reduce vibration and premature tool wear. For production environments where cycle-to-cycle consistency matters, the controlled radial accuracy contributes to higher first-pass yields and simplifies downstream quality control.

Secure engagement for thread-cutting applications

The built-in internal square (3.4 mm) enables positive torque transfer to thread-cutting tools without relying solely on clamping friction. Combined with the clamping diameter 4.5 mm and a compact length 34 mm, this geometry is optimised for use in machines where space and axial accessibility are limited. The design reduces the risk of tool slip during cutting operations and facilitates faster tool changes when used in ER-style collet chucks.

Integration into workshop processes and serviceability

The collet’s standardised dimensions and DIN conformity make it straightforward to replace or add to existing ER tool-holding inventories, supporting lean tool management. Fewer tool changes and stable clamping reduce machine downtime, while the compact construction assists in maintaining accessibility in tight fixtures. If further specification matching or application guidance is required, technical consultation can be provided to ensure optimal selection and integration.

Contact Metav Werkzeuge for precise ER-collet solutions and tailored advice from our Emmerich-based experts, available to support specification and supply decisions

Technical Data

• Article number: 2000834961NW
• Type: ER 25-GB
• Product: Collet GB
• Brand: TECWERK

Dimensions & tolerances

• Clamping range: 4.5 mm
• Runout accuracy: 15 µm
• Length: 34 mm
• Diameter: 4.5 mm
• Internal square: 3.4 mm

Special features

• DIN 6499 compliant
• Internal square for thread cutting
• Compatible with ER collet chucks
• Intended for thread-cutting and collet-chuck applications

FAQ

What tolerance can be expected from this collet?
The ER 25-GB collet from TECWERK is specified with a runout accuracy of 15 µm, providing tight radial control for precise machining tasks.

Is the collet suitable for thread-cutting tools with square drive?
Yes, the internal 3.4 mm square of the ER 25-GB secures thread-cutting tools and enables positive drive engagement during cutting operations.

Which collet chuck types are compatible with this item?
This collet is designed for ER collet chucks manufactured to DIN 6499 and is compatible with thread-cutting and ER-style collet chucks.

What are the key dimensions to consider when replacing an existing collet?
Key dimensions for the ER 25-GB are clamping diameter 4.5 mm, length 34 mm and internal square 3.4 mm; the SKU is 2000834961NW for precise identification.

Does the product data specify the material or coating?
The available data for the ER 25-GB does not specify material or coating; refer to the supplier specification or request additional technical data if required.

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