Integrated robot joint actuator
SteadyWin GIM Series integrated robot joint actuator
SteadyWin's main range of geared joint motors, from GIM3505 to GIM8108 frames with optional driver and brake versions; recent firmware supports MIT mode, Modbus, PWM and pulse/direction control.
Key specifications
| Data / bus | Modbus, PWM, pulse/direction |
|---|---|
| Sizes | GIM3505, GIM3510, GIM4305, GIM4310, GIM4315, GIM6010, GIM8108 (model names) |
| Control | MIT mode (firmware 0.6.0 aligns with the open-source version) |
| Options | versions without driver, with driver, core only, output shaft, with brake (GIM6010-8 drawings) |
Summarised in our own words from Jiangxi SteadyWin Automation Equipment Co., Ltd.'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1 · Source 2 · Source 3
Notes on this data
Torque, speed and voltage figures for GIM models are published only in images, drawings and manuals, which could not be read; no numeric specs recorded. Ratio may be encoded in the model suffix (e.g. -8, -36) but this is not stated.
Specify Motion is not affiliated with Jiangxi SteadyWin Automation Equipment Co., Ltd.. SteadyWin and GIM Series are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
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Our experienced engineers are on hand, ready to help with your project. Whether you need the SteadyWin GIM Series itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
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- Complete axis: motor, drive, gearing and feedback matched together
What an integrated robot joint actuator is
An integrated robot joint actuator packages a brushless motor, a reduction gear, encoders, a servo drive and often a brake or torque sensor into one module that bolts in as a robot joint. Gearing may be planetary, strain-wave or cycloidal. Many are designed for legged robots, humanoids and cobots, with low gear ratios or quasi-direct drive to keep the joint back-drivable and responsive. Communication is typically over CAN or EtherCAT, with position, velocity and torque control modes.
When engineers choose an integrated robot joint actuator
Choose an integrated joint actuator to build robots faster with fewer parts, especially legged, humanoid, exoskeleton and collaborative robots. Back-drivable versions suit force control and impacts. The trade-offs are torque density, precision and industrial qualification: low-ratio designs trade output torque for transparency, and some units are aimed at research rather than production duty. For industrial arms with heavy duty cycles, a dedicated harmonic actuator or motor and gear set may be better.
How to specify the SteadyWin GIM Series
Send these with your enquiry and an engineer can confirm the right GIM Series variant or an equivalent:
- Peak and continuous output torque (Nm)
- Output speed (rpm)
- Gear type and ratio
- Back-drivability and torque sensing
- Supply voltage (V DC)
- Communication interface and control modes
- Mass and size (kg, mm)
Common mistakes to avoid
- Using peak torque as continuous torque
- Ignoring thermal limits in legged robots
- Overlooking bus bandwidth with many joints
- Assuming research-grade units meet industrial life requirements
SteadyWin GIM Series: frequently asked questions
What is the SteadyWin GIM Series?
SteadyWin's main range of geared joint motors, from GIM3505 to GIM8108 frames with optional driver and brake versions; recent firmware supports MIT mode, Modbus, PWM and pulse/direction control. It is made by Jiangxi SteadyWin Automation Equipment Co., Ltd.; Specify Motion can help source it or propose an equivalent.
Who makes the SteadyWin GIM Series?
The SteadyWin GIM Series is made by SteadyWin (Jiangxi SteadyWin Automation Equipment Co., Ltd.) and is listed here for engineers comparing options. Specify Motion is not affiliated with Jiangxi SteadyWin Automation Equipment Co., Ltd.; brand names are used only to identify the product.
Is there an alternative to the SteadyWin GIM Series?
Yes. Our engineers can propose an equivalent built around your load, speed and environment. An engineer confirms the fit against your application before recommending anything.
What is a quasi-direct-drive actuator?
A quasi-direct-drive actuator uses a high-torque motor with a low gear ratio, typically below about 10:1, so the joint is back-drivable and responds quickly to external forces. This suits legged robots and force control. The trade-off is lower output torque than high-ratio joints of similar size.
Why integrate the drive in a robot joint actuator?
Integrating the drive reduces cabling and lets each joint communicate over a shared bus, which simplifies robot design. It also allows the drive to sit close to the motor, improving control. The trade-off is that heat from both motor and drive must be managed inside the joint.
Further reading: How to select a harmonic actuator · Frameless motor sizing robot joints · Gearboxes and harmonic drives
Other integrated robot joint actuator series
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Tell us about your project and how you use the SteadyWin GIM Series: the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
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