Summary

The Starrag Berthiez RVU 900/80 is a CNC vertical grinding machine designed for high-precision grinding applications, particularly in the bearing and aerospace industries. It enables complete machining—including grinding, hard metal turning, and drilling—in a single setup, with exceptionally high concentricity and axial run-out accuracies. Differentiating technical characteristics include a hydrostatic thrust bearing with a torque motor-driven table, a tilt-adjustable grinding head (-5° to +275°), and optional in-process measurement and wheel dressing.

Key Capabilities

• High-precision surface and internal grinding with concentricity and axial run-out accuracies below 2 μm
• Complete multi-process machining (grinding, hard metal turning, and boring) in a single clamping
• Up to four water-cooled grinding spindles with a maximum power of 45 kW at 18,000 rpm
• Electropermanent magnetic chuck for secure workholding
• Hydrostatic, torque motor-driven rotary table enabling vibration damping and torsional stiffness
• In-process options: dressing units, automatic grinding wheel changers, workpiece measurement, and process/contact monitoring
• Grinding head with tilt adjustment range from -5° to +275°, set via Hirth coupling

Key Specifications