Series RA
- Motion up to 50 µm open-loop, 40 µm closed-loop
- Free inside diameter of 9 mm or 14 mm
- Sub nm resolution
- Blocking force up to 4000 N
- µsec response time
- Flexible epoxy insulation
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Series RA – Description
Series RA ring actuators consist of a large number of contacted ceramic discs. Compared with a tube actuator, the ring actuator reaches a higher stiffness and the expansion is twice as high.
Series RA piezo actuators are encased, and also include a mechanical pre-load so they can be used in dynamic applications.
Series RA actuators are available for open-loop systems, and closed-loop (strain gauge) systems.
Technical Data
(See Datasheet PDFs below this chart for the complete list of product variations)
| 4 Example Products | UNIT | RA 12/24 | RA 50/35 | RA 12/24SG | RA 50/35SG |
|---|---|---|---|---|---|
| Part # | P-401-10 | P-406-10 | P-401-11 | P-406-11 | |
| Motion Open-Loop (±10%)* | μm | 12 | 50 | – | – |
| Motion Closed-Loop (±0.2%) | μm | – | – | 10 | 40 |
| Capacitance (±20%)** | μF | 2.9 | 24 | 2.9 | 24 |
| Stiffness | N/μm | 160 | 80 | 160 | 80 |
| Resolution Open-Loop*** | nm | 0.03 | 0.1 | – | – |
| Resolution Closed-Loop | nm | – | – | 0.5 | 2.0 |
| Dimensions – Length | mm | 36.5 | 70.5 | 36.5 | 70.5 |
| Outer Diameter | mm | 24 | 35 | 24 | 35 |
