RobStride RS04 QDD Joint Actuator
RobStride · MPN RS04 · Maglev ID ac-robstride-rs04
CN Maker in China, factory not confirmed unknown VERIFIED
Highest-torque RobStride QDD joint (120 N·m peak) for humanoid hips and knees; rated 40 N·m only with a 345x345 mm aluminium plate (35 N·m with 220x200 mm).
Specifications
| Peak torque | 120 N·m |
|---|---|
| Rated torque | 40 N·m (with specified heat-sink plate) |
| Gear ratio | 9:1 planetary |
| Voltage | 48 V rated (15-60 V) |
| Mass | 1420 g |
| Interface | CAN (RobStride CAN/CANopen protocol docs) |
Who makes it
MakerBeijing Lingzu Shidai Technology (RobStride, 北京灵足时代科技)
Based inChina
RoleBrand owner
RobStride publishes customization scope on its About page (per Maglev research CN001); no Maglev contact or quote yet.
Landed cost in the US
CN
41.5%
TW
10%
VN
16.5%
IN
14%
JP
12.5%
KR
12.5%
DE
10%
MX
14%
US
0%
Total US duty on this part by where it is made (2026-10-29). Mexico shown before USMCA preference; qualifying goods enter duty free. Your factory choice, not the shipping port, sets the origin.
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Compliance
| HTS classification | 8501.31.40.00 typical, not a ruling |
|---|---|
| NDAA | unknown |
| Blue UAS | unknown |
| FCC | n/a |
| Notes | Rated torque per RobStride spec dated 2026-07-13 assumes a specified aluminium heat-sink plate; free-standing continuous torque unknown. Interface: CAN per RobStride repo docs (CANopen doc linked); per-model interface not stated in the README. |
Equivalents from other makers
Sources
- https://github.com/RobStride/Product_Information/blob/main/README.mdspecs + CNY catalog price (spec dated 2026-07-13)
Record confidence: VERIFIED. VERIFIED means the maker's own documents; REPORTED means a credible third party; UNVERIFIED means a single weak source. Anything we could not confirm says unknown.