310mm Self-Centring Four-Jaw Square Lathe Chuck, 2,250 kgf Clamping Force, 0.03mm Accuracy - Vertex

Take advantage of the combination of 2,250 kgf clamping force and 0.03 mm accuracy to secure heavy workpieces reliably while maintaining concentricity; order directly via Metav Werkzeuge or consult our specialists for application-specific advice.

VMJ-12 four-jaw self-centring chuck — 2,250 kgf clamping force, 0.03 mm accuracy

VMJ-12 is a four-jaw, self-centring chuck designed for secure holding of square and round workpieces in demanding turning operations

• Self-centring four-jaw design for quick set-up
• 2,250 kgf clamping force for heavy-duty holding
• 0.03 mm accuracy for precise concentricity
• Robust 62.8 kg construction for vibration damping

Secure heavy-duty clamping with measurable holding power

The VMJ-12 combines a self-centring mechanism with high mechanical grip to deliver repeatable holding force where rigidity matters. The rated 2,250 kgf clamping force ensures firm contact between jaws and workpiece, reducing slippage during heavy cuts and interrupted machining. For production environments that demand consistent torque transmission and reduced rework, this chuck offers a reliable physical solution that shortens set-up time and increases spindle utilisation.

Achieve accurate concentricity for precision turning

With an indicated accuracy of 0.03 mm, the chuck supports tight concentricity tolerances required for fine turning and finishing operations. This level of precision translates into improved part run-out, better surface finish and reduced secondary machining. For users less familiar with metrology terms: 0.03 mm indicates the maximum deviation from true rotation under specified conditions, so fixtures and tools can be adjusted with confidence to meet inspection criteria.

Stability and mass for vibration control and surface quality

The unit’s substantial mass (62.8 kg) and compact footprint (310 x 380 x 141 mm) contribute to mechanical stability on the spindle, attenuating vibrations that otherwise compromise tool life and dimensional consistency. The solid construction benefits heavy-duty and medium-duty lathes where inertia helps maintain steady cutting conditions. Reduced chatter and improved heat dissipation during long cycles are direct advantages of the chuck’s robust design.

Simple integration and durable operation for industrial workflows

The four-jaw, square-capable concept enables flexible clamping of diverse geometries without complex backplates; setup is straightforward and repeatable, supporting lean workflows. The chuck is classified under ECLASS 21020590, reflecting its positioning within industrial clamping technology. Routine maintenance is limited to standard lubrication and jaw checks, keeping downtime low and ensuring a long service life when paired with regular inspection practices. The Vertex design focuses on durability and compatibility with conventional turning centres.

For demanding turning tasks, select the Vertex VMJ-12 with its 2,250 kgf holding capacity — contact Metav Werkzeuge in Emmerich for tailored application advice and assured delivery from our European hub.

Technical data

• SKU: VMJ-12
• GTIN: 4061905086380
• Type: Four-jaw self-centring chuck

Facts

• Clamping force: 2,250 kgf
• Accuracy: 0.03 mm
• Weight: 62.8 kg
• Dimensions: 310 x 380 x 141 mm

Special features

• Self-centring four-jaw design
• Suitable for square and round workpieces
• ECLASS: 21020590
• Manufacturer: Vertex

FAQ

What holding force can be expected from this chuck?
The VMJ-12 provides a rated clamping force of 2,250 kgf, designed for secure holding during heavy-duty turning.

How precise is the concentricity of the clamping system?
Concentricity is specified at 0.03 mm, which supports tight run-out tolerances for precision turning operations.

Is the chuck suitable for square stock as well as round bar?
Yes, the self-centring four-jaw design accepts both square and round workpieces, enabling flexible setup for various part geometries.

How does the mass of the chuck affect machining performance?
At 62.8 kg, the chuck’s mass improves stability and vibration damping, contributing to better surface finish and extended tool life.

Which standard or classification applies to this clamping device?
This chuck is referenced under ECLASS 21020590, indicating its classification within industrial clamping equipment.

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