
OVEKA
Precision compensating chuck for demanding shaft-type workpieces
" OVEKA/KA – SwissChuck's highly precise compensation chuck."
The workpiece is generally ground between centers for centric cylindrical, orbital pin, or form grinding of complex shaft-type components. The challenge faced by the workholding device is to transfer the necessary torque, and thus the rotational movement to the workpiece, without deforming it by excessive lateral loads. SwissChuck's high-precision OVEKA/KA compensating chucks have been originally designed for the machining of crankshafts, a task for which they have amply proven themselves. Over the years, these chucks have undergone continuous improvements such that today, they are perfectly suited for grinding all shaft-type workpieces. Our compensating chucks are available in 2-, 3-, or 4-jaw versions.
![OVEKA [Translate to English:] OVEKA Präzisions-Ausgleichsfutter](/fileadmin/_processed_/5/8/csm_oveka_titelbild_cd6f9e71b8.jpg)
Technical data
OVEKA - Quatron | hydraulic actuation

Type | Number of Jaws | Stroke per Jaw radial [mm] | Clapming Force max. [kN] | Weight [kg] | Speed [1/min] | Outer-ø [mm] | Height [mm] |
2OVEKA 140 | 2 | 5 | 15 | 10 | 1500 | 140 | 109 |
3OVEKA 140 | 3 | 3 | 30 | 10 | 1500 | 143 | 109 |
2OVEKA 170 | 2 | 5 | 158 | 16 | 2000 | 170 | 101 |
4OVEKA 180 | 4 | 2 | 50 | 20 | 3000 | 180 | 118 |
4OVEKA 206 | 4 | 2 | 55 | 27 | 1000 | 206 | 118 |
4OVEKA 270 | 4 | 2 | 55 | 45 | 1000 | 270 | 118 |
4OVEKA 270 | 4 | 2 | 55 | 46 | 1000 | 270 | 118 |
KA | actuation through a clamping cylinder

Type | Number of Jaws | Stroke per Jaw radial [mm] | Clamping Force max. [kN] | Actuating Force max. [kN] | Weight [kg] | Speed max. [1/min] | Outer-ø [mm] | Height [mm] |
2KA 140 | 2 | 5 | 15 | 8 | 10 | 2500 | 140 | 109 |
3KA 140 | 3 | 3 | 20 | 20 | 10 | 3000 | 143 | 109 |
2KA 170 | 2 | 5 | 15 | 8 | 16 | 2000 | 170 | 101 |

Functions & Fields of Application
- 2-, 3- and 4-jaw versions are available in varied sizes
- Mostly intended for grinding machines
- Special versions available for combined grinding and hard-turning operations
Advantages
- With a patented circulating lubrication system (OVEKA)
- Highly sensitive hydraulic compensation
- Sealed chuck
- Small design height
- Very low maintenance
- 10-year warranty

Effortless compensation of workpiece-related concentricity errors in the clamping area!
The clamping devices are designed so that the effective clamping force is only fully applied when all clamping jaws are in contact with the clamping point. The highly sensitive compensation easily compensates workpiece-related concentricity errors in the area of the clamping point. The compact design allows optimum utilization of the machine-side center-to-center distance. Thus, the OVEKA/KA compensation chucks form the ideal interface between the workpiece and machine spindle when grinding between centers.
With a patented circulating lubrication system
The hydraulically actuated chuck series OVEKA is equipped with the patented EP1 190 815 circulation lubrication. All internal chuck components are actively lubricated during each clamping process. With virtually maintenance-free chucks, this results in minimal lifecycle costs. Downtimes in production due to malfunctions of the clamping system are eliminated.
2OVEKA 140
With a gear shaft:
Clamping between centers
- Grinding of the OD diameter
- Typical between-center grinding operation
- Highly accurate concentricity
![[Translate to English:] 2OVEKA 140 mit Getriebewelle](/fileadmin/user_upload/Produktebilder/OVEKA/anwbsp_klein_Getriebewelle.jpg)
3KA 140
Ball screw shaft:
Clamping of ball screw shafts between centers
- Grinding of the ball screw track
- Accurate and firm positioning of the shaft to the center point
- Very short and thin-walled clamping location
![[Translate to English:] 3KA 140 mit Kugelgewindewelle](/fileadmin/user_upload/Produktebilder/OVEKA/anwbsp_Kugelspindel.jpg)
2OVEKA 140
Clamping camshafts in the pitch circle of the gear profile:
Form grinding of the cam geometry
- Angular pre-alignment with a special positioning mechanism
- Precise angular clamping in the pitch circle
- Top jaws with integrated tungsten carbide clamping pins
![[Translate to English:] 2OVEKA 140 mit Zahnrad](/fileadmin/user_upload/Produktebilder/OVEKA/anwbsp_klein_Nockenwelle_mit_Zahnrad.jpg)
3KA 140
Shaft part of CVT gearbox:
Clamping CVT shaft component
- Grinding of cone and outer diameters
- Stable and powerful clamping
- High roundness, concentricity, and axial runout accuracies
![[Translate to English:] KA 140 mit Vraiogetriebe-Welle](/fileadmin/user_upload/Produktebilder/OVEKA/anwbsp_klein_Variogetriebe-Welle.jpg)