Summary

The Starrag Berthiez RVU 4700/450 is a precision CNC vertical grinding machine engineered for high accuracy grinding of large components. It delivers concentricity and axial run-out accuracies under 5 μm, supporting complete machining in one setup. Key technical differentiators include a hydrostatic rotary table driven by a torque motor, multiple high-power grinding spindle options, programmable head tilt, and support for hard metal turning and drilling.

Key Capabilities

• High-precision grinding with concentricity and axial run-out < 5 μm
• Complete machining (grinding, optional boring, and hard metal turning) in a single clamping
• Configurable with up to four water-cooled grinding spindles and automatic wheel changers
• Hydrostatic thrust bearing and torque-driven rotary table for vibration damping and high torsional stiffness
• Programmable spindle head tilt from -5° to +275° (Hirth coupling lock)
• In-process workpiece measurement and process monitoring
• Suited for large workpieces up to 4,500 mm diameter and 12,000 kg table load

Key Specifications