R Series Servo Motors

The Pacific Scientific R series (Regal) servo motors include five frame sizes of high-performance servomotors with rare earth magnets. These PacSci motors are now branded as Kollmorgen products and are only offered to support existing applications.


  • 1.7 to 53 N-m (15 to 473 lb-in) continuous torque
  • Wide range of sizes
  • Speeds to 7,000 RPM meet very high speed application requirements
  • Rugged brushless construction eliminates the need to replace brushes and stands up to the rigours of the factory floor
  • High torque over a wide speed range provides improved machine throughput
  • Rare earth magnets
  • Anti-cog motor design offers smooth low-speed operation
  • IP65 sealing offers resistance to dust and low-pressure water jets
  • Class H insulation provides longer life for reduced machine downtime
  • Overtemperature thermistor protects against motor damage

For new applications please consider the AKM Series servo motors.

Servo Motor Selection Guide