Engineering solutions
Only if any single element provides optimal performance parameters can a rotary table system be tailored to customer's requirements. Within one GRT construction size, the use of an intermediate table plate allows for several table top sizes and chucking systems. The measuring system is fitted directly onto the table axis for all table sizes.
A torque motor which comes in two different performance classes can be built into any construction size and provides direct drive. Besides high speeds and acceleration, this motor features excellent accuracy and control performance.
A locking system which is offered as an option helps compensate tangential moments arising from special machining conditions. The labyrinth sealing between table top and housing reliably ensure that no grinding dust or emulsion coolant may enter the table. The table housing will be customized to the design of your machine.
When magnetic chucking systems are used, the measuring systems may have a big center bore to allow the assembly of slip rings.
Requirements
Customer requirements essentially determine the characteristic features of a product – this is the motto on which the Rückle group acts. For GRT series, we concentrate on satisfying our customer's demand for different table tops and magnetic chucking systems within one construction size, and a rigid mounting to bear component weights as high as 15 t with excellent damping features. Besides this a reliable, backlash-free drive is required to obtain an excellent control performance in positioning and continuous operation. The drive's running features must be so good as to allow uniform rotatary motion with speeds as high as 200 RPM.
The optional locking system shall withstand machining moments as high as 40 kNm at a positioning accuracy less than +/- 5 arcsec. The use of magnetic chucking systems furthermore implies the need of a center bore for slip rings to ensure signal transmission. A lateral runout of 1 μm through ø 1,600 mm and a circular runout of 1 µm through ø 200 mm are further high-quality accuracy criteria.
Fact sheets
GRT 400
| Table sizes | mm | 600 | 700 | 800 |
| Max. centric load capacity up to | kg | 3,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 400 |
| Safe max, tilting Torque up to | Nm | 5,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 250 |
| Nominal torque up to | Nm | 1,000 |
| Max. speed up to | RPM | 500 |
Locking system |
||
| Tangential Torque up to | Nm | 5,500 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,001 |
| Truth of running | mm | 0,001 |
GRT 500
| Table sizes | mm | 700 | 800 | 1,000 |
| Max. centric load capacity up to | kg | 4,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 500 |
| Safe max, tilting Torque up to | Nm | 10,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 200 |
| Nominal torque up to | Nm | 1,500 |
| Max. speed up to | RPM | 400 |
Locking system |
||
| Tangential Torque up to | Nm | 12,000 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,001 |
| Truth of running | mm | 0,001 |
GRT 650
| Table sizes | mm | 1,000 | 1,200 | 1,400 |
| Max. centric load capacity up to | kg | 5,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 650 |
| Safe max, tilting Torque up to | Nm | 15,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 175 |
| Nominal torque up to | Nm | 2,000 |
| Max. speed up to | RPM | 350 |
Locking system |
||
| Tangential Torque up to | Nm | 20,000 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,001 |
| Truth of running | mm | 0,001 |
GRT 800
| Table sizes | mm | 1,250 | 1,400 | 1,600 |
| Max. centric load capacity up to | kg | 6,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 800 |
| Safe max, tilting Torque up to | Nm | 25,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 150 |
| Nominal torque up to | Nm | 2,500 |
| Max. speed up to | RPM | 300 |
Locking system |
||
| Tangential Torque up to | Nm | 25,000 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,001 |
| Truth of running | mm | 0,001 |
GRT 1000
| Table sizes | mm | 1400 | 1600 | 1800 |
| Max. centric load capacity up to | kg | 8,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 1,000 |
| Safe max, tilting Torque up to | Nm | 40,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 125 |
| Nominal torque up to | Nm | 3,500 |
| Max. speed up to | RPM | 250 |
Locking system |
||
| Tangential Torque up to | Nm | 30,000 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,001 |
| Truth of running | mm | 0,001 |
GRT 1400
| Table sizes | mm | 1800 | 2000 | 2200 |
| Max. centric load capacity up to | kg | 10,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 1,400 |
| Safe max, tilting Torque up to | Nm | 70,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 100 |
| Nominal torque up to | Nm | 7,000 |
| Max. speed up to | RPM | 200 |
Locking system |
||
| Tangential Torque up to | Nm | 40,000 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,001 |
| Truth of running | mm | 0,002 |
GRT 2000
| Table sizes | mm | 2200 | 2600 | 3000 |
| Max. centric load capacity up to | kg | 15,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 2,000 |
| Safe max, tilting Torque up to | Nm | 150,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 75 |
| Nominal torque up to | Nm | 10,000 |
| Max. speed up to | RPM | 150 |
Locking system |
||
| Tangential Torque up to | Nm | 60,000 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,001 |
| Truth of running | mm | 0,002 |
GRT 2800
| Table sizes | mm | 3000 | 3500 | 4000 |
| Max. centric load capacity up to | kg | 25,000 |
Hydrostatic bearing |
||
| Bearing diameter | mm | 2,800 |
| Safe max, tilting Torque up to | Nm | 220,000 |
Torque motor drive 1 |
||
| Nominal Speed bis zu | RPM | 50 |
| Nominal torque up to | Nm | 14,000 |
| Max. speed up to | RPM | 100 |
Locking system |
||
| Tangential Torque up to | Nm | 100,000 |
Accuracy |
||
| Dividing accuracy 2 | arcsec | +/- 2 |
| Lateral runout 3 | mm | 0,002 |
| Truth of running | mm | 0,003 |
Notes
1 Drive data are not associated one with another; they will be customized according to the application.
2 Depending on the measuring system
3 Referred to the bearing diameter
Further information and customized modifications on request.
Technical data are subject to change.
