Product overview
The Zhuhai SV Tech Co., Ltd. AXR 7308 MG-D is a micro servo for lightweight fixed-wing control surfaces and compact linkage mechanisms. A coreless motor, metal gears and two bearings form its mechanical configuration. Its 23.5 × 8 × 16.6 mm body weighs 8.8 g and has a 185 mm cable. Installation requires matching the power supply, signal pulse widths, mounting holes and servo-arm connection. Required torque depends on control-surface loading, lever-arm length and movement speed, making both installation space and linkage geometry relevant to selection.
The servo operates over 3.8–8.4 V with PWM control at 333 Hz. At 8.4 V, stall torque is 3.5 kg·cm, no-load speed is 0.065 s/60°, and rated torque is 0.9 kg·cm. Continuous-load selection must account for rated torque and duty cycle rather than treating stall torque as sustainable output. The 1520 µs reference pulse and 1500 µs position midpoint require confirmation of center and usable travel with the controller and delivered version. Initial setup should use no load or limited load, and the supply needs capacity for transient current.
Specifications
| Specification | Value & conditions |
|---|---|
| Product model | AXR 7308 MG-D |
| Product type and application | Micro servo for lightweight fixed-wing control surfaces and compact mechanisms |
| Operating voltage | 3.8–8.4 V |
| Rated torque | 0.9 kg·cmAt 8.4 V. |
| Overall dimensions | 23.5 × 8 × 16.6 mm |
| Weight | 8.8 g |
| Motor type | Coreless motor |
| Gear material | Metal gears |
| Bearing count | 2 |
| Cable length | 185 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° |
| Stall torque at 3.8 V | 2.6 kg·cmAt a test voltage of 3.8 V; stall torque. |
| No-load speed at 3.8 V | 0.175 s/60°At a test voltage of 3.8 V; no load. |
| Running current at 3.8 V | 0.04 AAt a test voltage of 3.8 V. |
| Stall current at 3.8 V | 0.4 AAt a test voltage of 3.8 V; stalled. |
| Stall torque at 6 V | 3 kg·cmAt a test voltage of 6 V; stall torque. |
| No-load speed at 6 V | 0.083 s/60°At a test voltage of 6 V; no load. |
| Running current at 6 V | 0.09 AAt a test voltage of 6 V. |
| Stall current at 6 V | 1 AAt a test voltage of 6 V; stalled. |
| Stall torque at 8.4 V | 3.5 kg·cmAt a test voltage of 8.4 V; stall torque. |
| No-load speed at 8.4 V | 0.065 s/60°At a test voltage of 8.4 V; no load. |
| Running current at 8.4 V | 0.11 AAt a test voltage of 8.4 V. |
| Stall current at 8.4 V | 1.2 AAt a test voltage of 8.4 V; stalled. |
| Continuous-load limitation | Stall torque cannot serve as a continuous-load rating; continuous-load selection must account for rated torque and duty cycle. |
| Center position and usable travel | Confirm center position and usable travel with the controller and delivered version; the reference pulse is 1520 µs and the position midpoint is 1500 µs.With the controller and delivered servo version in use. |
| Supply range qualification | The operating voltage range defines the permitted supply range. |
| Mounting dimensions and interface | Drawings and specifications may use different dimensional references; confirm the final mounting drawing and interface version before fabricating mounting parts. |
