Frameless BLDC Servo MotorsEXTERNAL ROTOR
External Rotor
The External Rotor is available from Source Engineering Inc. in Santa Clara, CA for OEM frameless servo motors programs. Contact us for sizing, customization, samples, and volume pricing.

Specifications
- Model
- External Rotor
Key Features
- External Rotor: OEM motion component configured for your application
- Custom shafts, windings, and mounts available
- US engineering support with overseas manufacturing cost structure
- Prototype to production volumes
Configuration Options
- Custom shafts, windings, encoders, and cable assemblies on request
- Prototype samples through production volumes
Applications
- Robotic joints
- Compact servo systems
- Humanoid robotics
- Medical devices
- Aerospace actuators
When to Choose This Model
Choose a frameless servo when you need maximum torque density with direct integration into your own housing.
Frequently Asked Questions
What is the External Rotor used for?
The External Rotor is used in OEM motion-control applications. Contact us to match torque, speed, and mounting to your design.
Can you customize this model?
Yes. Shafts, windings, ratios, encoders, cables, and mounting interfaces can be customized for OEM programs.
How do I get pricing and lead time?
Request a quote with your quantity, target specs, and timeline. We typically respond within one business day.
Ready to spec your next motion system?
Talk to a Source Engineering application specialist. No obligations, just answers.






