MyActuator RMD-X8
Workhorse of the wide RMD-X planetary QDD catalog — strong availability and a size ladder that lets one vendor cover a whole quadruped or arm build.
Full specifications
Last verified: 2026-07| Architecture | Torque motor + low-ratio planetary† |
| Reduction | 6:1 (Pro variants 9:1)† |
| Catalog | RMD-X series spans multiple frame sizes† |
| Bus | CAN† |
| Encoder | Multi-turn magnetic† |
| Price band | ≈$200–500/joint |
| MOQ | 1 unit |
† Manufacturer-reported, not yet independently verified.
Fits with
Confirmed and manufacturer-claimed platform compatibility. We check your exact wrist and communication setup before quoting.
Supplier
MyActuator makes documented, English-supported RMD-series planetary and harmonic joint modules for the DIY robotics and systems-integration markets across a wide torque range.
Downloads
FAQ
Which RMD-X size do I need?
Send your torque-vs-speed operating points, not just peak torque — the series spans several frame sizes and the wrong pick wastes mass or overheats. Ask for the derating curve for your candidate size.
How does it compare with AK-series?
Comparable architecture and price band; RMD's edge is catalog breadth and availability. If your reference codebase used AK modules, matching them is usually worth more than a small spec difference.
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