BrainCo Revo 3-21 Basic Robot Hand
In stock
- BRAND:
- BRAINCO
- MODEL:
- REVO 3-21 BASIC
- ORIGIN:
- China
- Warranty:
- 12 MONTHS
- AVAILABILITY:
- SUBJECT TO AVAILABILITY
- SKU:
- BrainCo-Revo-3
Most robot hands are judged by how firmly they hold; the BrainCo Revo 3-21 Basic Robot Hand is better judged by how readily it gives way. Its joints are described as direct-driven and backdrivable, meaning a push on a finger can be felt and followed by the mechanism rather than resisted by a gearbox. For laboratories and integrators who want a hand that cooperates with its surroundings, that distinction matters more than any headline grip strength.
Robots Middle East is the seller of this hand. We quote it for customers in the Middle East, arrange its supply to the project site, and remain the point of contact for delivery and support questions once it is in your hands.
Background
BrainCo and the Revo lineage
BrainCo is a Hangzhou-based company which, according to its published history, was founded in 2015. The Revo name has already appeared on earlier hands, and our catalogue lists the BrainCo Revo 1 Intelligent Dexterous Bionic Hand and several Revo 2 models, including the BrainCo Revo 2 Basic Right Dexterous Bionic Hand (XRR). Revo 3 is described as the third generation of the series and, per the published announcement, was launched on 10 April 2026.
The sources name several Revo 3 versions: U21, U21F, U21T and U21VT. Resellers use the names Basic, Touch and Vision. The Basic name has no manufacturer page of its own, so the correspondence between the reseller names and the model codes should be confirmed with us at quotation.
Positioning and key technology
The manufacturer positions Revo 3 as a biomimetic dexterous hand for industrial automation, scientific research and advanced robotics manipulation. Its central idea, as reported, is that each degree of freedom has a motor of its own: 21 independently driven motors for 21 fully active degrees of freedom, in a form factor the source calls compact and lightweight. The distribution follows the human hand, with five degrees of freedom in the thumb and four in each of the index, middle, ring and pinky fingers.
The joints are reported as direct-driven and backdrivable, which the source credits with rapid response and high control density across all finger segments. That is a statement of intent about how the hand is meant to be controlled, and it is the reason it suits work in which individual fingers are commanded rather than the hand as a whole.
Technical Specifications
| Specification | Value |
|---|---|
| Model | BrainCo Revo 3-21 Basic Robot Hand |
| Degrees of freedom | 21, all active (all Revo 3 models) |
| Motors | 21, independently driven |
| Thumb | Five degrees of freedom |
| Index, middle, ring and pinky fingers | Four degrees of freedom each |
| Joint drive | Direct-driven, backdrivable |
| Durability rating | Over 1,000,000 joint flex cycles |
| Reported qualification testing | Vibration, impact, payload, temperature extremes, salt spray |
| Software development kits | C/C++ and Python, for Linux and Windows |
| Recommended power supply | Stable 24V DC, at least 100W |
| Default RS485 IDs | Left hand 126, right hand 127, broadcast 0 |
| Weight | Not published |
| Operating temperature | Not published |
| IP rating | Not published |
| Operating noise | Not published |
| Contents of the box | Not published |
Specifications as published by a single source; they are confirmed against the datasheet at quotation, and the unpublished items above are confirmed at the same time.
What makes the Revo 3 different from a two-jaw gripper?
A two-jaw gripper is a single decision: closed or open. A hand with 21 independently driven joints is a different kind of tool, because each finger segment can be positioned separately. This allows a grasp to be shaped to the object, and in principle lets an object be repositioned within the fingers rather than set down and picked up again. The manufacturer presents the hand for exactly this sort of manipulation work, although the fact sheet gives no task-level performance figures, and we do not state any.
The backdrivable joints add a second difference. Because the joints are direct-driven, external forces can travel back through the mechanism. For research into compliant contact, teleoperation or learning from demonstration, that behaviour is often the point of choosing such a hand. The manufacturer's published description attributes rapid response to the design; how that translates into force or speed values is not stated in the sources we hold, and the manufacturer has not published payload per finger, so it is confirmed at quotation.
Durability is the third difference. The hand is reported as rated for over 1,000,000 joint flex cycles and as qualified through vibration, impact, payload, temperature extremes and salt spray testing. These are reported claims from a single source, and the test conditions behind them are not given, so buyers with a demanding environment should request the datasheet.
How is the Revo 3 powered, connected and programmed?
The published guidance is to use a stable 24V DC supply rated for at least 100W, in order to reduce the risk of voltage drop. That advice is worth following during integration, since a hand with many motors can draw sharply when several fingers move together.
Communication runs on an RS485 bus. In the published network topology, the default left hand ID is 126, the default right hand ID is 127, and the broadcast ID is 0. Those defaults are stated for Revo 2 and Revo 3 alike, which simplifies a laboratory that already runs earlier Revo hands.
On the software side, the manufacturer provides cross-platform C/C++ and Python SDKs compatible with Linux and Windows. Teams working in robotics middleware or in scripting environments will find a familiar entry point. On power-on, the hand carries out a physical position calibration: it searches for the starting position of each finger, and all fingers open during that period. Operators should therefore keep the hand clear of obstructions and of people's hands each time it is switched on.
Who is the BrainCo Revo 3-21 Basic Robot Hand for?
University and corporate research groups form the most natural audience, particularly those working on embodied AI, teleoperation and dexterous manipulation, where a hand with individually commanded joints and an open SDK is a practical requirement. Automation engineers who have reached the limit of parallel grippers, for example in fine assembly or handling of small, varied parts, are a second group. Developers of humanoid and service platforms are a third.
The Basic name is the entry version in the reseller naming. If your work depends on touch sensing, look at the BrainCo Revo 3-21 Touch Robot Hand, or at the BrainCo Revo 3-21 V-Touch Robot Hand if vision is also relevant; the fact sheet does not detail what each version adds, so we confirm the differences at quotation. The whole family is gathered in the BrainCo Revo 3 category. Buyers who only need a simpler, earlier-generation hand may compare the Revo 2 models listed there.
What is the BrainCo Revo 3-21 Basic Robot Hand used for?
- Dexterous manipulation research: studying grasping, in-hand motion and finger coordination with each joint commanded separately.
- Embodied AI development: giving learning systems a hand with enough degrees of freedom to express human-like behaviour.
- Teleoperation: mapping an operator's hand movements onto a robot hand with a similar finger layout.
- Industrial automation: handling parts and tools that a two-jaw gripper cannot hold securely.
- Humanoid and service robots: serving as the end effector on platforms that must work with objects made for human hands.
- Teaching and prototyping: supporting laboratory courses and proof-of-concept builds through Python and C/C++ SDKs.
Pricing and Availability
We do not publish prices for this hand; a quotation is the way to obtain one, tailored to your quantity and project. Robots Middle East arranges delivery, customs and support together with the quotation, so that the whole cost and schedule are clear before you commit. Please submit your requirements through the quotation option available on this page.
Frequently Asked Questions
How many degrees of freedom does the Revo 3 have?
It is reported to have 21 fully active degrees of freedom, each with its own motor: five in the thumb and four in each of the other four fingers.
Are the joints backdrivable?
Yes, according to the published specification, the joints are direct-driven and backdrivable, which supports rapid response and fine control across all finger segments.
What power supply does it need?
The manufacturer recommends a stable 24V DC supply with a rating of at least 100W, to reduce the risk of voltage drop.
Which programming languages and operating systems are supported?
C/C++ and Python SDKs are reported, compatible with Linux and Windows.
What happens when the hand is switched on?
It performs a physical position calibration, searching for the starting position of each finger, and all fingers open during this period.
How heavy is it, and what is its IP rating?
The manufacturer has not published the weight, operating temperature, IP rating or operating noise; these are confirmed at quotation, as is the contents of the box.
Where can I buy the BrainCo Revo 3-21 Basic Robot Hand and what does it cost?
It is supplied by Robots Middle East. The cost depends on your quantity and delivery requirements, so please request a quotation and we will respond with the details.
Summary
The BrainCo Revo 3-21 Basic Robot Hand is a hand defined by what its joints permit: 21 independently driven motors, a thumb and four fingers laid out like their human counterparts, and backdrivable joints that yield rather than resist. Software support for C/C++ and Python, a clear power recommendation and a published durability rating complete a credible integration case, while the unpublished weight and environmental data are confirmed before purchase. For research and automation teams in the Middle East who are ready to move beyond the gripper, this page is the starting point.
