370mm Three-Point Self-Centre Low-Profile 3-Jaw Lathe Chuck 3670 kgf Clamping Force - Vertex

Take advantage of the combination of self-centring accuracy, an extra-flat profile and a robust clamping force to keep turning operations productive and stable; order the chuck directly via Metav Werkzeuge or request advice from our consultants.

VNBK-12 — 3-jaw self-centring lathe chuck, extra-flat, 370 mm (Vertex)

A VNBK-12 is a self-centring, extra-flat 3-jaw lathe chuck designed for secure clamping of larger workpieces in heavy-duty turning applications.

• Self-centring 3-jaw design
• Extra-flat profile for reduced overhang
• 370 mm diameter for larger workpieces
• High clamping force 3,670 kgf

Consistent clamping for repeatable parts

The self-centring mechanism ensures fast, reliable engagement of the jaws and contributes to high repeatability across series runs. With a focus on dependable performance, this chuck minimises set-up variation so that machining tolerances are easier to maintain. The design supports efficient production flows by reducing time spent on manual centring and alignment, delivering a measurable increase in process stability.

Reduced overhang for improved rigidity

The extra-flat profile reduces the distance between the workpiece and the spindle centre, which directly improves rigidity and vibration behaviour during turning. For operations that require tight concentricity and surface finish, a low-profile chuck decreases bending moments and helps to maintain tool life. This characteristic is particularly beneficial when working with longer or asymmetrical components where cantilever effects can compromise accuracy.

Confidence under load with robust clamping

A specified clamping force of 3,670 kgf provides secure grip on substantial blanks and machined parts, enabling reliable machining under heavier cutting conditions. The sturdy jaw engagement translates to fewer re-clamps and less downtime for checks, supporting throughput gains in batch production. The chuck’s mechanical principles favour consistent force transmission for repeatable holding, which is essential for demanding turning tasks.

Practical integration and workshop advantages

With a 370 mm diameter the chuck accommodates larger diameters while remaining practical to install and balance in a typical workshop environment. The combination of compact form and solid mass contributes to predictable dynamic behaviour on medium and large lathes. As a modular clamping solution, it simplifies tooling planning and supports a wide range of turning tasks without frequent fixture changes.

Contact Metav Werkzeuge for a specification check and to discuss how the Vertex VNBK-12 self-centring chuck with extra-flat design and 3,670 kgf clamping force fits the workshop requirements; Metav Werkzeuge can advise on compatibility and supply logistics.

Technical data

• SKU: VNBK-12
• GTIN: 4061905086311
• Diameter: 370 mm
• Weight: 46.8 kg
• Clamping force: 3,670 kgf
• ECLASS: 21020401
• Manufacturer: Vertex

Core specifications

• Diameter: 370 mm
• Weight: 46.8 kg
• Clamping force: 3,670 kgf
• ECLASS: 21020401

Features and compatibility

• Self-centring 3-jaw configuration
• Extra-flat profile
• Designed for heavy-duty turning operations
• Category: Vertex

FAQ

What is the primary advantage of a self-centring chuck?
A self-centring chuck like the Vertex VNBK-12 aligns the jaws simultaneously, reducing set-up time and improving repeatability for batch production.

Which workpiece sizes does this chuck support?
The chuck provides a 370 mm effective diameter, making it suitable for larger turning operations where a wide gripping range is required.

How does the extra-flat design affect machining?
The extra-flat profile reduces overhang, increasing rigidity and improving surface finish and dimensional stability during turning.

Is the clamping force sufficient for heavy cutting?
With a clamping force of 3,670 kgf the VNBK-12 offers secure holding for substantial workpieces and is suitable for demanding cutting conditions.

Can this chuck be used on various lathe types?
The VNBK-12 is intended for integration on compatible heavy-duty lathes; final suitability should be confirmed against the machine spindle and mounting standard.

Manufacturer: Vertex Machinery Works Co., Ltd.; No. 296, Sec. 1, Feng Shih Road, Fengyuan District, Taichung City 420, Taiwan