| 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 TTL build: the same mechanics, commanded over a serial bus so several servos can share one signal line and be addressed individually. Useful when the actuator count outgrows the PWM channels available.
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 | TTL serial |
| Amplifier | Digital controller |
| 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-S9450TTL 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.
Is the pulse width table valid for this unit?
No. The microsecond window printed on the inspection sheet belongs to the PWM build of the same servo. This unit is commanded over the serial bus — ask for the command set and register map before writing firmware.
How many can share one bus?
The limit is the address space and the current budget of the shared supply, not the signal pair. Keep the bus ground common with the power ground at a single point.
Other interfaces
Downloads
- XQ-S9450TTL inspection specification (PDF, 428 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.
