| 700KG·CM STALL | 0.210S/60° NO-LOAD | 30V RATED |
| 895G WEIGHT | SteelGEARTRAIN | 360°TRAVELCustomizable |
Overview
The 9450D is the 700 kg·cm servo: a 100 × 50 × 97 mm block machined from aluminium, 895 g, running 24 to 30 V. At this torque class the servo stops being a component you bolt on and becomes a structural part of the machine — the case has mounting ears on both sides and the output is a 25T-φ11.98 mm spline.
Eight ball bearings carry the geartrain, which is what 700 kg·cm demands: at full load the radial force on the output shaft would destroy a two-bearing layout. The gear train is steel, the horn is metal, and the electrical interface is a socket so the harness is specified by whoever builds the machine.
This page covers the PWM build: a standard 50–333 Hz pulse input, 1500 µs neutral and a 3–4 µs dead band. It is the version to pick when the servo hangs off a receiver or a flight controller and you want nothing between the two.
Performance at each supply voltage
| Supply | No-load speed | Peak stall torque | Idle current | Stall current |
|---|---|---|---|---|
| 24 V | 0.300 s/60° (200 °/s) | 560 kg·cm (54.94 N·m / 7777 oz·in) | 400 mA | 18 A |
| 28 V | 0.250 s/60° (240 °/s) | 650 kg·cm (63.77 N·m / 9027 oz·in) | 430 mA | 21 A |
| 30 V | 0.210 s/60° (286 °/s) | 700 kg·cm (68.67 N·m / 9721 oz·in) | 450 mA | 22.5 A |
Control specification
| Item | Specification |
|---|---|
| Command signal | PWM, 50–333 Hz |
| Amplifier | Digital controller |
| Pulse width range | 500–2500 µs, customizable |
| Neutral position | 1500 µs, customizable |
| Dead band | 3 µs |
| Rotating direction | CCW (1000–2000 µs), customizable |
| Travel | 360°, customizable |
Mechanical specification
| Item | Specification | Item | Specification |
|---|---|---|---|
| Dimensions | 100 × 50 × 97 mm | Case material | Aluminium, CNC |
| Weight | 895 g | Geartrain | Steel |
| Bearings | 8 × ball bearing | Motor | Brushless |
| Output spline | 25T-φ11.98 mm | Horn | Metal |
| Lead / connector | Socket, cable sold separately | Mechanical limit | No limit |
| Operating temperature | −30 °C to 60 °C | Storage temperature | −30 °C to 70 °C |
| Ingress protection | Splash resistant (customizable) | Travel | 360°, customizable |
What’s in the box
- 1 × XQ-S9450D servo
- 1 × 7075 aluminium horn
- 1 × mounting screw pack
How to size it
Current is the design driver here. At 30 V the servo pulls 22.5 A at stall and 450 mA idle; a supply sized for the idle current will drop out on the first load step. Budget a 24–30 V supply that can deliver 25 A per servo for transients, and use cable rated for it.
The 700 kg·cm headline is the 30 V figure. On 24 V it is 560 kg·cm at 0.30 s/60° — 20% less torque for 43% more travel time. Size the linkage at the rail the machine will actually hold under load.
FAQ
What supply does the 9450D need?
24 to 30 V DC, and it needs to be a real supply: stall current is 18 A at 24 V and 22.5 A at 30 V. It is not a receiver-pack servo.
Is the cable included?
No. The servo ends in a socket and the mating cable is ordered separately in the length the machine needs.
What pulse range does it accept?
The inspection sheet specifies a 500–2500 µs window (800–2200 µs on the 9130/9150) with 1500 µs neutral, both customizable at order. Feeding it outside that window is out of spec.
Can I drive it from a normal receiver?
Signal-wise yes, but check the supply. This servo wants 8.4–16.8 V, not a 6 V receiver pack, so the power rail has to be separate from the receiver’s.
Other interfaces
Downloads
- XQ-S9450D inspection specification (PDF, 429 KB)
Torque, speed and current at each supply voltage, mechanical data, control specification, mounting dimensions. - 2D dimension drawing (image)
Mounting hole positions, case depth and overall height; the same drawing is inside the datasheet.
