7mm ER16 Collet With 5.5mm Internal Square For Thread Cutting, 15µm Runout - TECWERK

High concentricity with a 15 µm runout combined with a 7 mm clamping diameter and a 5.5 mm internal square delivers precise tapping and thread-cutting results in compact tool setups. Order the ER16-GB collet directly via Metav Werkzeuge or request advice from our consultants to confirm suitability and stock.

ER16-GB collet — compact 7 mm clamping diameter, 5.5 mm internal square (TECWERK)

ER16-GB collet for precision tapping and thread cutting in ER-type collet chucks, designed for compact installations where runout and repeatability are critical.

• High runout accuracy 15 µm
• Clamping diameter 7 mm
• Internal square 5.5 mm for tapping
• Short length 27.5 mm

Deliver consistent thread quality with low runout

The 15 µm runout accuracy of this ER16-GB collet reduces wobble during rotation, which directly improves thread concentricity and tool life. In practical terms, the reduced radial deviation translates to fewer rejects and more predictable tapping forces; this is particularly beneficial for small-diameter threads where even minor runout causes visible quality loss. Conformance to DIN 6499 ensures the collet matches standard ER tooling interfaces, simplifying integration into existing setups without additional adaptors.

Compact form for tight fixturing and accessibility

A length of 27.5 mm and the small outer profile make the collet suitable for confined toolholders and short overhangs, enabling closer tool proximity to the workpiece and improved rigidity. The 7 mm clamping diameter is a common size for small taps and cutters, offering a balance between gripping area and minimal tool projection. This compact design helps maintain stable cutting conditions, which supports higher productivity and reduces the risk of tool breakage in delicate operations.

Internal square for reliable tapping operations

The built-in 5.5 mm internal square (four-sided) is specifically designed to accept tapping squares for thread cutting, preventing slippage during tapping and ensuring secure torque transmission. Where a separate tap holder would add length and complexity, this integrated square simplifies the tool chain and shortens set-up time. By combining clamping and drive functions in one component, the collet supports efficient workflows in production and maintenance settings.

Suitable applications and compatibility overview

Engineered for use in ER-type collet chucks, the collet is suitable for tapping and small-diameter machining tasks across general workshop, toolroom and light production environments. Its specification is focused on mechanical performance rather than material-specific claims; compatibility with standard ER chucks and DIN 6499 interfaces allows straightforward interchangeability. For unusual or highly specialised material applications, customers may consult the technical team to confirm fit and process parameters.

For tailored technical advice and dependable supply from Metav Werkzeuge — including stock confirmation and recommendations for integration into existing ER collet systems — contact our consultants at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 2000834958NW
• Type: ER 16-GB
• Product: GB collet
• Manufacturer: TECWERK

Facts

• Clamping diameter: 7 mm
• Runout accuracy: 15 µm
• Length: 27.5 mm
• Internal square: 5.5 mm

Special features

• Conforms to DIN 6499
• Internal square for tapping/thread cutting
• Suitable for ER collet chucks
• Short design for compact tooling

FAQ

What does the 5.5 mm internal square do?
The internal square transfers driving torque for tapping operations; the 5.5 mm four-sided recess in the ER16-GB collet secures taps and prevents slippage during thread cutting.

Is this collet compatible with standard ER chucks?
Yes, the ER16-GB collet conforms to DIN 6499 and is compatible with ER-type collet chucks designed for ER16 tooling interfaces.

What benefit does a 15 µm runout specification provide?
A runout of 15 µm improves concentricity and repeatability, resulting in better thread quality and longer tool life when using the ER16-GB collet.

Can the collet be used for both tapping and general clamping?
The ER16-GB collet is optimised for tapping because of the internal square, but it also functions as a precision clamping element for small tools with a 7 mm shank.

How does the short length affect machining?
The 27.5 mm length reduces overhang, increasing rigidity and accessibility in tight setups, which helps maintain stable cutting conditions and reduces vibration.

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