BrainCo Revo 3-21 Touch Robot Hand
In stock
- BRAND:
- BRAINCO
- MODEL:
- REVO 3-21 TOUCH
- ORIGIN:
- China
- Warranty:
- 12 MONTHS
- AVAILABILITY:
- SUBJECT TO AVAILABILITY
- SKU:
- BrainCo-Revo-3-Touch
BrainCo Revo 3-21 Touch Robot Hand
Muscle without skin can only push; it cannot judge. The BrainCo Revo 3-21 Touch Robot Hand gives a robot both. Its independently driven, backdrivable fingers do the moving, and a pressure-sensitive array across the palm reports where an object makes contact. For teams whose robots must handle objects rather than merely carry them, that second channel of information changes what can be attempted.
The product is available through this page, by quotation.
Background
BrainCo and the Revo lineage
BrainCo is a Hangzhou-based brain-computer interface company, and the Revo range is its line of dexterous robot hands. The Revo 3 is the third generation, and it sits alongside earlier hands that remain in the catalogue, such as the BrainCo Revo 1 Intelligent Dexterous Bionic Hand and the Brainco Revo 2 Touch Biomimetic Dexterous Right Hand (XTR). The Revo 3 generation is a biomimetic dexterous hand designed for industrial automation, scientific research and advanced robotics manipulation.
The generation comes in four versions: Revo 3 U21, Revo 3 U21F, Revo 3 U21T and Revo 3 U21VT. They share one mechanical and electrical platform and differ in how much of the hand can feel. The whole group can be browsed in the BrainCo Revo 3 category.
Positioning and key technology of the Touch hand
The Touch hand is the version with full-palm tactile sensing. Its mechanism has 21 independent motors driving 21 fully active degrees of freedom, and the joints are direct-driven and backdrivable. Direct drive removes intermediate transmission stages between motor and joint. Backdrivability means that an external force can move the joint, which is useful when a hand meets an unexpected obstacle or is guided by hand during teaching.
The sensing layer is a full-palm piezoresistive array with 451 points. Where a purely mechanical hand knows only its own joint positions, this hand also receives a map of pressure across the palm. It is packaged as a compact, lightweight form factor, with outer dimensions given in the table below.
On the software side, the hand is supported by cross-platform C/C++ and Python SDKs that work with Linux and Windows, and by ROS support. Communication runs over EtherCAT, CAN FD or RS-485, so it can be integrated into real-time control architectures as well as into research set-ups.
Technical Specifications
| Specification | Value |
|---|---|
| Total degrees of freedom | 21 (direct-driven and backdrivable) |
| Motors | 21 independent motors |
| Hand dimensions | 216 × 108 × 50 mm |
| Supply voltage | 16–85 V |
| Max current | 10 A (24 V) |
| Max active grip force | ≥100 N |
| Max fingertip pinch force | ≥25 N |
| Total hand payload | 20 kg |
| Four-finger payload | 5 kg |
| Repeatability | 0.1° |
| Joint open/close time | 0.33 s |
| Grasp types | 33 (Feix GRASP taxonomy); full score on the Kapandji opposition test |
| Communication interfaces | EtherCAT / CAN FD / RS-485 |
| Communication frequency | 500 Hz |
| Onboard sensors | IMU (mainboard), temperature (mainboard) |
| Tactile distribution | Full-palm tactile |
| Tactile type | Full-palm piezoresistive array |
| Tactile array | 451 points (piezoresistive) |
| Durability | Over 1,000,000 joint flex cycles |
| Software | C/C++ and Python SDKs for Linux and Windows; ROS support |
| Power supply | Stable 24V DC, at least 100W |
Specifications as published by the manufacturer; confirmed against the datasheet at quotation.
The manufacturer has not published the weight, the IP rating, the box contents, the operating temperature range or the hand material; they are confirmed at quotation.
What makes the Touch hand different from the Basic version?
The difference lies in sensing, not in the mechanism. The BrainCo Revo 3-21 Basic Robot Hand belongs to the same platform, with the same joint count, dimensions, electrical limits and communication interfaces across the Revo 3 versions. For tactile distribution, however, the Basic version has no entry, while the Touch version carries a full-palm array.
In practice this decides what a controller can learn from a contact. A hand without tactile feedback can be commanded to close, but it can only infer the result from joint positions and motor current. A hand with a 451-point palm array can report where on the palm an object is pressing. That information is useful for checking a grasp, for adjusting an object in the hand, and for collecting data to train manipulation policies.
The Basic version remains a sensible choice where the task is repeatable and the objects are well known. The Touch version is the better match where the contact itself is the subject of the work.
How does the Touch hand compare with the V-Touch version?
The BrainCo Revo 3-21 V-Touch Robot Hand is the U21VT version. Its tactile distribution is full-palm, as on the Touch hand, so the two share the same headline sensing coverage. The figures in this article are those for the Touch hand and should not be read across to the V-Touch version. If you are weighing the two, request the datasheet of each with your quotation and compare them side by side.
Against the earlier generation, the Touch hand is a larger step in articulation. The Revo 3 offers 21 actively driven degrees of freedom and a repeatability of 0.1°, together with a durability of over 1,000,000 joint flex cycles. Buyers already using a Revo 2 hand will find the same family approach but a considerably richer platform.
Who is the BrainCo Revo 3-21 Touch Robot Hand for?
Research laboratories are the most obvious audience. A hand with 33 grasp types in the Feix taxonomy, a full score on the Kapandji opposition test and palm-wide pressure data suits work on in-hand manipulation, imitation learning and teleoperation.
Humanoid and mobile-manipulator developers form a second group. The hand is compact, its interfaces are standard, and ROS support and Python and C/C++ SDKs shorten the path from delivery to first motion.
Industrial integrators will look at the combination of a 20 kg total hand payload, a ≥100 N active grip force and EtherCAT connectivity with a 500 Hz communication frequency. These suit automation cells in which the hand must handle varied objects and report back on contact.
If your application does not need palm sensing, the Basic version may serve better. If you need to evaluate the V-Touch configuration, compare it with this hand before deciding.
What is the BrainCo Revo 3-21 Touch Robot Hand used for?
- Dexterous manipulation research. Independent control of 21 degrees of freedom lets researchers study multi-finger coordination and in-hand repositioning.
- Tactile learning. The 451-point palm array provides contact data for training and evaluating grasp and manipulation models.
- Humanoid robot end-effectors. The compact hand gives a humanoid platform a human-like way of handling objects.
- Industrial automation cells. Its payload, grip force and repeatability support handling tasks that need more adaptability than a simple gripper.
- Teleoperation and demonstration. Backdrivable joints and fast open and close times support guided teaching and remote operation.
- Teaching and prototyping. Standard SDKs, ROS support and common fieldbus interfaces make the hand practical for lab courses and proof-of-concept builds.
Pricing and Availability
No price is printed on this page. Please request a quotation, stating your application, the quantity and the interface you plan to use, and we will respond with the configuration that fits. Delivery, customs and support are arranged together with the quotation. The BrainCo Revo 3-21 Touch Robot Hand is available on this page.
Frequently Asked Questions
How many degrees of freedom does the hand have?
It has 21 degrees of freedom, each driven by its own motor, which gives 21 independent motors. The joints are direct-driven and backdrivable.
How is the hand controlled?
It supports EtherCAT, CAN FD and RS-485, with a communication frequency of 500 Hz. Software support comprises C/C++ and Python SDKs for Linux and Windows, together with ROS support.
What kind of tactile sensing does it have?
It has a full-palm piezoresistive array of 451 points. Its onboard mainboard sensors are an IMU and a temperature sensor.
What power supply should I use?
A stable 24V DC power supply of at least 100W is advised, to reduce the risk of voltage drop. The supply voltage range is 16–85 V, and the maximum current is 10 A at 24 V.
What loads can the hand carry and grip?
The total hand payload is 20 kg and the four-finger payload is 5 kg. The maximum active grip force is ≥100 N and the maximum fingertip pinch force is ≥25 N.
How long is the hand designed to last?
Its joints are good for over 1,000,000 flex cycles. Please ask us at quotation about any other durability matters.
Where can I buy the BrainCo Revo 3-21 Touch Robot Hand and what does it cost?
It is available through this page, by quotation. The cost is given in the quotation itself, so please send your requirements and we will reply.
Summary
The BrainCo Revo 3-21 Touch Robot Hand pairs movement with feeling: 21 independently driven degrees of freedom for the motion, and a 451-point palm array for the sensation. Its figures, including a 20 kg total hand payload, 0.1° repeatability and a 500 Hz communication frequency over EtherCAT, CAN FD or RS-485, suit research, humanoid and industrial work alike. Compare it with the Basic and V-Touch versions, send us your requirements, and this page is the starting point.
