Product Description
The WHEATSTONE Frameless Motor is engineered for direct integration into customer equipment, offering high torque density, compact design, and precision control. Without a housing, bearings, or feedback device, frameless motors provide maximum design flexibility for engineers who require performance in space-constrained applications.
Compact Integration – Stator and rotor kit design allows direct installation into mechanical structures.
High Torque Density – Optimized electromagnetic design delivers strong torque in a compact footprint.
Precision Performance – Smooth speed regulation and accurate positioning for demanding motion systems.
Thermal Efficiency – Advanced winding technology ensures efficient heat dissipation under high load.
Flexible Design – Customizable dimensions, winding configurations, and mounting options.
Reliability – Built with high-quality insulation materials for long service life in continuous operation.
Motor Type: Frameless Brushless Servo Motor (Stator + Rotor Kit)
Voltage Range: Customizable (Low to High DC/AC supply options)
Torque Output: High torque-to-weight ratio
Cooling: Natural cooling / optional liquid or forced-air cooling
Materials: High-grade laminations, copper windings, rare-earth magnets
Applications: Robotics, aerospace, medical devices, direct-drive systems, industrial automation
38mm Outer Diameter Frameless Torque Motor

| Motor Specifications | 38WK-口00130-48V-18-9 | 38WK-口00230-48V-18-16 | 38WK-口00750-48V-19-7 | |
| DC Voltage | 48 | 48 | 48 | |
| Rated Power | 31.4 | 62.8 | 128 | |
| Rated Torque | 0.1 | 0.2 | 0.35 | |
| Maximum Torque | 0.3 | 0.6 | 1.05 | |
| Rated Current | 2.2 | 3.9 | 5 | |
| Maximum Current | 6.6 | 11.7 | 15 | |
| Rated Speed | 3000 | 3000 | 3500 | |
| Maximum Speed | 4500 | 4500 | 4500 | |
| Moment of Inertia | 0.018 | 0.032 | 0.053 | |
| Coefficient of counter-electromotive force | 3.2 | 3.4 | 4.5 | |
| Wire resistance | 1.35 | 0.7 | 0.73 | |
| Wire Inductance | 0.75 | 0.4 | 0.49 | |
| Polar Coordinates | 7 | 7 | 7 | |
| Weight | 60 | 100 | 165 | |
| Tooth-Slot Torque | 8(Reference Values) | 15(Reference Values) | 16(Reference Values) | |
| Dimensions | L1 (Core Height) | 9 | 16 | 27 |
| L2 (Rotor Height) | 10 | 17 | 28 | |
| L3 (Overall Height) | 15.5 | 22.6 | 34.6 | |