Product overview
The Zhuhai SV Tech Co., Ltd. AXR 9850 MG-D serves model steering, control-surface movement and mechanical actuation. Its physical configuration combines a coreless motor, stainless steel gears and two bearings in a 40 × 20 × 36.8 mm body weighing 75 g, with a 300 mm cable. Integration requires matching the supply, signal pulse widths, mounting holes and servo-arm connection. Mount fabrication also depends on the final installation drawing and interface version because dimensional references can differ.
The servo accepts 4.8–8.4 V power and PWM control at 333 Hz. At 8.4 V, it delivers 50 kg·cm stall torque and a no-load speed of 0.09 s/60°, with rated torque specified separately as 20 kg·cm. Stall torque is unsuitable as a continuous-load rating, and duty cycle matters when selecting working loads. The 1520 µs reference pulse differs from the 1500 µs position midpoint, so usable center and travel depend on the controller and delivered version. Power integration must accommodate transient current and cable voltage drop.
Specifications
| Specification | Value & conditions |
|---|---|
| Product type and purpose | Standard servo for model steering, control surfaces and mechanical actuation |
| Operating voltage | 4.8–8.4 V |
| Stall torque | 35 kg·cm6 V test voltage. |
| Speed | 0.122 s/60°6 V test voltage; no load. |
| Running current | 0.4 A6 V test voltage. |
| Stall current | 5 A6 V test voltage; stalled. |
| Stall torque | 42 kg·cm7.4 V test voltage. |
| Speed | 0.108 s/60°7.4 V test voltage; no load. |
| Running current | 0.51 A7.4 V test voltage. |
| Stall current | 6.3 A7.4 V test voltage; stalled. |
| Stall torque | 50 kg·cm8.4 V test voltage. |
| Speed | 0.09 s/60°8.4 V test voltage; no load. |
| Running current | 0.6 A8.4 V test voltage. |
| Stall current | 7.5 A8.4 V test voltage; stalled. |
| Rated torque | 20 kg·cm8.4 V. |
| External dimensions | 40 × 20 × 36.8 mm |
| Weight | 75 g |
| Motor type | Coreless motor |
| Gear material | Stainless steel gears |
| Bearing count | 2 |
| Cable length | 300 mm |
| Control signal | PWM |
| Operating frequency | 333 Hz |
| Reference pulse width | 1520 µs |
| Pulse width and corresponding angle | 500 / 1500 / 2500 µs → -90 / 0 / 90° |
| Load limitation | Stall torque cannot be used as a continuous-load rating; continuous-duty selection must consider rated torque and duty cycle. |
| Center and travel qualification | The reference pulse is 1520 µs, while the position midpoint is 1500 µs; center and usable travel require confirmation for the controller and delivered version.Controller and delivered version. |
| Mounting qualification | Drawings and tabulated dimensions may use different dimensional references; confirm the final mounting drawing and interface version before fabricating mounting parts.Final mounting drawing and interface version. |
