Berthiez RVU 3700/350

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Berthiez RVU 3700/350

Fewer rejects thanks to high concentricity and axial run-out accuracies (< 5 μm)

Wide manufacturing range thanks to precise and powerful table drive (torque motor)

Increased productivity through complete machining in just one set-up

vertical grinding machine

The RVU grinding machines set new standards in high-precision machining and are especially suitable for high precision grinding applications in the bearing and aerospace industries. The range can be equipped with up to four water-cooled grinding spindles which can achieve a performance of 45 kW at 18,000 rev/min. (according to the type of grinding wheel selected)

The RVU facilitates a complete machining processing without interruption as optional dressing units, grinding wheel changers and workpiece measurement are available. Additional options for hard metal machining boring and workpiece measurement increase the possible applications of the machine series considerably.

Axis configuration

Innovative Solutions

The machine has high drive power of 45 kW at speeds up to 18000 rpm. Extra spindles are available with 25 kW at 5000 rpm.

The hydrostatic thrust bearing and the rotary drive are driven by the torque motor. The hydrostatic table bearing with table driven by torque motor ensures a vibration-damping torsional stiffness.

The means for process optimization range from workpiece contact monitoring, process monitoring, automatic or partially automated dynamic balancing up for workpiece measurement.

The grinding head tilt can be adjusted in the range -5 ° to +275 °. Fixation is achieved by a Hirth coupling.

The geometrical properties with a concentricity and axial running

The machine offers the optional possibility for hard metal turning and drilling.

The RVU facilitates a complete machining processing without interruption as optional dressing units, grinding wheel changers and workpiece measurement are available. Additional options for hard metal machining boring and workpiece measurement increase the possible applications of the machine series considerably.

The cast iron construction allows excellent vibration damping and high stiffness. It forms the basis for high accuracy and excellent surface quality.

Technical Data

Swing diameter mm 3,700
Grinding diameter mm 3,500
Height under grinding wheel thickness 100 mm mm 500 / 800
Standard table diameter mm 3,500
Table speed rpm 70
Table load kg 8,000
Carriages 1 or 2
Grinding ram stroke mm 800 / 1,000
Feed force kN 10
X- and Y-axis speed max. mm/min 10,000
Spindle-holder tilt degree - 5° + 275°
Tilt lead degree 1° (Hirth)
Power (conv. GW) (S1) kW 7 à 45
Speed (conv. GW) rpm 4,000 à 12,000
Power (CBN wheels) (S1) kW 15 / 25
Speed (CBN wheels) rpm 8,000 / 18,000
GW diameter (conv. or CBN) max. mm 150 / 300 / 400 / 500 / 600
Wheel thickness max. mm 50 / 100 / 190
Wheel-holder clamping taper face x
Surface grinding spindle (conv. GW) (S1) kW 25
Spindle speed rpm 5,000
Wheel diameter max. mm 400 / 500
Electropermanent magnetic chuck No. of poles / slots width mm 36 / 12H10

All inclusive for France: Tout compris — à la carte

Berthiez RVU vertical grinding machine in General Electric's gas turbine production

Read success story

Service Plus Package

Perfect service for perfect machines

Precondition for above-average productivity, efficiency and economy is a constant high availability of the machine. And necessary for this above all, besides innovative technology, is: A tailored service, which is perfectly coordinated to your individual requirements.

ServicePlus guarantees you machine availabilities of at least 95%!

Troubleshooting

Our call center staff immediately understands your service requirements and passes them on quickly and appropriately to our technical hotline or to the appropriate service advisor.

Starrag Hotline: +49 371 836 23 68

All Service Products

Spindle overhaul

Overhaul concepts tailored optimally to your requirements

Training courses

Efficient machine operation thanks to optimal training courses

Replacement parts

Fast and reliable supply of replacement parts due to global logistics network

Maintenance

High technical availability through preventive maintenance

Service near you

Time is money! That also applies when it concerns the service and maintenance of your machine. The Starrag Service and Logistics Centres near you have the necessary infrastructure, in order to guarantee you perfect service.

Service Contact

Partnering for Efficiency

Service Plus

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I have been informed that I can withdraw my consent to the processing of my personal data at any time. Withdrawal shall not affect the legality of any data processing already carried out before withdrawing my consent. By providing my consent, I confirm that I am aged 16 years or older. I hereby consent to the processing of my data. I give my consent voluntarily. I know that this declaration of consent will be saved.