The 38LW03 is an ultra-compact frameless torque motor delivering 0.102 N·m rated torque and 0.32 N·m peak torque at 10,300 RPM, operating at 48 VDC, ideal for high-speed lightweight robotic joints such as quadruped robots.
Frameless Torque Motor 38LW03
Frameless Torque Motor 38LW03 is engineered for lightweight robotic platforms where high speed, minimal inertia, and compact size are critical. Powered at 48 VDC, it reaches 10,300 RPM while maintaining 0.102 N·m rated torque and 0.32 N·m peak torque, enabling rapid and responsive motion control.
The motor features a 7 pole-pair configuration with balanced electrical characteristics:
Rated Current: 2.8 A
Peak Current: 8.8 A
Resistance: 1.2 Ω
Inductance: 0.48 mH
Back-EMF Constant: 2.3 Vrms/krpm
With an outer diameter of 38 mm and an ultra-light 60 g construction, the 38LW03 is ideal for quadruped robots, lightweight joint actuators, and compact direct-drive motion modules where mass and responsiveness are critical.

This specification table presents the fundamental electrical and mechanical characteristics required for proper application and system integration. Rated values indicate continuous operating conditions, while additional parameters highlight peak capabilities, performance limits, and control requirements. These specifications serve as essential design references for engineers evaluating compatibility, load conditions, and performance expectations.
| Rated Voltage | Rated Speed | Rated Current | Rated Torque |
|---|---|---|---|
|
48 VDC |
10,300 RPM | 2.8 A | 0.102 N·m |
| Rated Power | Peak Torque | Peak Current | Pole Pairs |
| 110 W | 0.32 N·m | 8.8 A | 7 |
The outline drawing provides the complete mechanical dimensions and installation interfaces for this product. It includes key measurements such as outer diameter, mounting points, shaft or bore sizes, tolerances, and required clearances to ensure correct fitment. These dimensions support accurate system design, housing layout, and seamless integration into a wide range of mechanical assemblies.

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