High Force Voice Coil Actuators

The VCA series actuators were developed to fill a market gap for large, high force, linear voice coil actuators. Two standard sizes are offered that each include a linear bearing, encoder, and thermocouple. The linear bearing can be replaced with a flexure that is tuned to fit application-specific needs. Cleanroom and vacuum-compatible versions are also available as well as customizable interfaces.




  • Shakers
  • Beam steering
  • Stabilized platforms
  • Fatigue testing


  • High accelerations
  • High bandwidths
  • Smooth, precise motion
  • Zero backlash
  • No cogging
  • No commutation

Product Features



Stroke length 24 mm 20 mm
Force constant 40 N/Amp 147 N/Amp
Max current - air cooled (5 scfm) 9 Amps (RMS) 12 Amps (RMS)
Max current - uncooled 3 Amps (RMS) for 30 minutes 3 Amps (RMS) for 30 minutes
Resistance 1.6 Ω 4.6 Ω
Inductance 4 mH 35 mH
Frequency output DC to >1 kHz DC to >1 kHz
Diameter 151 mm 236 mm
Length 196 mm 215 mm
Total mass 11.5 kg 42 kg
Moving mass 0.5 kg 2 kg
Sensor type Linear encoder Linear encoder
Sensor resolution 0.5 μm 0.5 μm