8mm ER16 Collet With 6.2mm Internal Square For Thread Cutting, 15µm Runout - TECWERK

The compact design and proven runout specification make this collet a dependable choice for precision clamping: its clamping diameter of 8 mm and runout of 15 µm deliver repeatable concentricity for toolholding and thread‑cutting tasks. Order the collet directly via Metav Werkzeuge or ask our consultants if needed.

TECWERK ER 16-GB collet – clamping diameter 8 mm, internal square drive 6.2 mm

The ER 16-GB collet is a DIN‑compliant clamping sleeve designed for secure toolholding and thread‑cutting operations in workshop and production environments.

• DIN 6499 with internal square
• Clamping diameter 8 mm
• Runout 15 µm for high concentricity
• Length 27.5 mm, compact design

Precision concentricity for reliable machining

The design prioritises repeatable accuracy: with a specified runout of 15 µm, this clamping sleeve maintains concentricity under normal operating conditions, reducing tool wear and improving surface finish. The specification is intended for users who require measurable stability during rotation; the DIN 6499 compliance and the internal square drive ensure that torque transfer during thread cutting is consistent, while the clamping geometry controls radial deflection for cleaner results.

Secure clamping and thread‑cutting capability

Equipped with an internal square, the collet suits both ER collet chucks and thread‑cutting collet chucks, enabling controlled torque transmission when tapping or forming threads. The combination of the GB variant and the square drive is particularly useful when axial forces and rotational torque must be transferred without slippage. This results in safer threading operations and minimises the need for rework, supporting higher process uptime in toolrooms and maintenance shops.

Compact dimensions for versatile toolholding

With a total length of 27.5 mm and a clamping diameter of 8 mm, the component fits into compact toolholders where space is limited. The small footprint makes it suitable for fine finishing, small‑part machining, and setups where multiple tools are arranged closely. The internal square measures 6.2 mm, matching standard GB specifications and enabling compatibility with dedicated thread‑cutting fixtures and ER‑type chucks.

Practical benefits for workshop workflows

Specified as a Type ER‑GB collet, this sleeve offers a pragmatic balance between accuracy and ease of replacement. The predictable runout and standardised interface simplify inventory and reduce setup time when swapping tools. For procurement and planning, the compact format and DIN conformity support consistent machine setup across multiple centres, helping to maintain steady throughput and product quality without elaborate calibration routines.

For TECWERK clamping solutions, contact Metav Werkzeuge for expert advice and fast supply from Emmerich: info@metav-werkzeuge.com or +49 2822 7131930; Metav’s specialists will advise on suitable collets and delivery options.

Technical data

• Article number: 2000834953NW
• Type: ER 16-GB
• Product: Collet (GB variant)

Facts

• Clamping diameter: 8 mm
• Square drive: 6.2 mm
• Length (L): 27.5 mm
• Runout accuracy: 15 µm
• Packaging unit: 1

Special features

• DIN 6499 with internal square for thread cutting
• Suitable for ER collet chucks and thread‑cutting chucks
• Compact design for limited‑space toolholders
• Label: Spannzange ER16-GB Spann-D.8mm 4-KT.6,2mm TECWERK

FAQ

What machines is this collet compatible with? This ER‑GB collet is compatible with standard ER collet chucks and thread‑cutting collet holders designed for DIN 6499 interfaces; check the chuck specification for ER 16 compatibility.

Can the collet be used for thread cutting? Yes, the internal square drive and the GB configuration are intended to support thread‑cutting operations, providing secure torque transfer during tapping.

How precise is the concentricity of the collet? The collet specification indicates a runout of 15 µm, which supports consistent concentricity for general precision toolholding.

What are the exact dimensions of the collet? Key dimensions: clamping diameter 8 mm, square drive 6.2 mm, and overall length 27.5 mm.

What is the product designation or SKU for ordering? The article is listed as ER 16-GB with SKU 2000834953NW for ordering and stock reference.

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