Coreless servos from 1.2 to 38 kg-cm of stall torque, from 9 g micro models for indoor aircraft and robot joints to sealed 40 x 20 mm servos for control surfaces. The rotor has no iron core, so it starts and reverses with very low inertia, and the whole line runs on the standard PWM signal at 6.0 to 8.4 V.
On a small mechanism, moving mass and response usually decide the design long before peak torque does. A coreless rotor carries no iron core, so it accelerates with far less inertia.
Without an iron core the rotor is light, so it reaches speed quickly and stops with less overshoot than a heavier armature on the same gear ratio.
The micro models start at 9.1, 10, 12 and 14 g, which keeps small airframes, gimbals and multi-joint robot arms inside their weight budget.
A coreless winding does not cog the way an iron core does, which is why these servos are chosen for camera mechanisms, model surfaces and animatronic joints.
Every model in the line takes the standard PWM control signal, so a coreless servo replaces another micro servo without changing the receiver, controller or wiring.
The line is built around mass and repeat accuracy, which is where small servos usually fail: gear lash, batch-to-batch centering and voltage sag under load.
Twenty-two of the twenty-four models list a steel or metal gear set; the two 9 g models leave gear material blank in the factory record, so confirm those two on the model row rather than assuming it across the series.
The 54 g, 60 g and 68 g cases all keep the 40 x 20 mm mounting footprint, so a torque change is a part swap rather than a new bracket.
Four models are 25.2 or 26.6 mm tall and sealed, for chassis decks, retract bays and wet enclosures where a standard-height servo will not close the cover.
A 24 x 8.5 mm case rated 5 kg-cm at 6.0 V shows how far the gear staging was compressed to fit micro airframes.
Torque, speed and current are published at both operating voltages on every model, so performance is matched to the battery actually used rather than one test point.
Centering and run current are checked at final inspection, because a build with several joints needs matched neutrals rather than one calibrated servo.
24 models, all PWM with brushless coreless motors. Click any model to expand its full specifications and recommended application. Torque values are stall torque at the rated voltage.
| Image | Model | Voltage | Stall Torque | No-Load Speed | Stall Current | Weight | Dimensions | Motor | Gear | Key Feature |
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Rated torque is the continuous-duty working value; stall torque is the peak mechanical limit and stays the sizing reference. Model codes shown with a brand prefix placeholder. Photos, simplified dimension drawings and datasheet links are placeholders; real assets will be added before launch. Detailed CAD files are factory-confidential and are not distributed. Custom codes, packaging and labeling are available under our OEM / white-label program. A dash means the value is not listed in the factory record for that model.
Four ways to narrow the line: moving mass, case height, torque at your supply voltage, and whether the build needs sealing.
Indoor aircraft, small robot joints, camera and display mechanisms where every gram is counted. 1.2 to 7 kg-cm at rated voltage.
Waterproof low-case servos for chassis decks, tight fuselages and retract bays where a standard 40 mm height will not close the cover.
The 40 x 20 mm workhorses in 54 g, 60 g sealed and 68 g cases, for small fixed-wing and rotorcraft surfaces, boats and OEM mechanisms.
Sealed 79 g servos for larger surfaces and outdoor duty where the fast, smooth action of a coreless drive is still wanted.
Send the moving mass, the arm length, the travel angle, the supply voltage and the space you have. We can shortlist coreless models that clear the load without paying for a case you cannot fit.