Joint Actuator Assembly
A quasi-direct-drive module pairing a high-torque BLDC motor with a single-stage planetary reduction for backdrivable torque control. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
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Bill of materials
8 top-level lines · 24 rows shown · 74 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Stator Assembly 3 parts | stator-assembly | 1× | 1 | 3 | assembly |
| 1.1 | Stator Core (laminations) | stator-core | 1× | 1 | — | part |
| 1.2 | Copper Winding | copper-winding | 1× | 1 | — | part |
| 1.3 | Slot Insulation | stator-insulation | 1× | 1 | — | part |
| 2 | Rotor Assembly 4 parts | rotor-assembly | 1× | 1 | 19 | assembly |
| 2.1 | Rotor Shaft | rotor-shaft | 1× | 1 | — | part |
| 2.2 | Rotor Core | rotor-core | 1× | 1 | — | part |
| 2.3 | Neodymium Magnet | neodymium-magnet | 16× | 16 | — | part |
| 2.4 | Ball Bearing | ball-bearing | 1× | 1 | — | part |
| 3 | Neodymium Magnet | neodymium-magnet | 28× | 28 | — | part |
| 4 | Planetary Gearset 4 parts | quadruped-robot-planetary-gearset | 1× | 1 | 8 | assembly |
| 4.1 | Sun Gear | quadruped-robot-sun-gear | 1× | 1 | — | part |
| 4.2 | Planet Gear | quadruped-robot-planet-gear | 3× | 3 | — | part |
| 4.3 | Ring Gear | quadruped-robot-ring-gear | 1× | 1 | — | part |
| 4.4 | Ball Bearing | ball-bearing | 3× | 3 | — | part |
| 5 | Motor Housing | motor-housing | 1× | 1 | — | part |
| 6 | Ball Bearing | ball-bearing | 2× | 2 | — | part |
| 7 | Encoder | encoder | 2× | 2 | — | part |
| 8 | Actuator Driver Board 5 parts | quadruped-robot-actuator-driver | 1× | 1 | 11 | assembly |
| 8.1 | Bare PCB | pcb-bare | 1× | 1 | — | part |
| 8.2 | Microcontroller | mcu | 1× | 1 | — | part |
| 8.3 | Power MOSFET | mosfet | 6× | 6 | — | part |
| 8.4 | SMD Passive (R/C/L) | smd-passives | 1× | 1 | — | part |
| 8.5 | Connector | connector | 2× | 2 | — | part |
Used in 1 assembly
Sourcing — likely vendors
Companies that make this · indicative price $2–$500 · MOQ & lead are typical| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
| 🇨🇳Inovance inovance.com ↗ | Shenzhen, CN | Drives & motion control | 500 units | 10–14 wks |
| sonacomstar.com ↗ | Gurugram, IN | EV driveline & motors | 500 units | 10–14 wks |
| broad-ocean.com ↗ | Zhongshan, CN | Electric motors | 500 units | 10–14 wks |
| nidec.com ↗ | Singapore | Motors — regional ops | 500 units | 10–14 wks |
| bosch.in ↗ | Bengaluru, IN | Automotive components | 500 units | 10–14 wks |