Piezo Ring Actuator

Series R

  • Ring actuator without casing and without preload
  • Motion up to 50 µm
  • Open inside diameter of 9 to 14 mm
  • Blocking force up to 4000 N
  • µsec response time
  • Flexible epoxy insulation
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Series R Actuators – Description

Series R 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 R piezo actuators are without casing, and without a pre-load. They are only connected at the ceramic top and ground plate. These ring actuators (without a pre-load) should not be used in dynamic applications.

Series R actuators are for open-loop systems only.

Please ask for a screwing top plate for easy mounting of mirrors.

Technical Data

(See Datasheet PDFs below this chart for the complete list of product variations)

3 Example ProductsUNITR 12/14R 25/20R 50/20
Part #P-401-00P-404-00P-406-00
Motion Open-Loop (±10%)*μm122550
Capacitance (±20%)**μF2.91224
Resolution Open-Loop***nm0.030.050.1
Dimensions – Heightmm13.52754
Outer Diametermm142020
*Typical value measured with an NV 40/1 CLE amplifier. **Typical value for small electrical field strength. ***The resolution is only limited by the noise of the power amplifier.

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