BrainCo Revo 2 Basic Left Dexterous Bionic Hand (XRL)

The BrainCo Revo 2 Basic Left Dexterous Bionic Hand (XRL) brings BrainCo's second-generation dexterous-hand technology to left-hand and bimanual robotic applications. Despite its compact, bionic form, the hand produces at least 50 N of active five-finger grip strength, at least 15 N of pinch strength, and a full load rating of at least 20 kg. As the Basic configuration of the Revo 2 family (version codes XRL/XRR), the left-hand XRL communicates over RS-485 and CANfd at rates up to 1 kHz, runs from a 12–28 V supply, and is fully programmable through an SDK for Python and C on Linux, Windows, and ROS.

Background

A second generation built on proven engineering

BrainCo approached the Revo 2 as a technology iteration rather than a clean-sheet gamble. The company's foundation in prosthetic hands — devices that must be light, quiet, durable, and lifelike — informed the mechanical and control architecture, and the operational experience gained from the Revo 1 dexterous hand shaped the upgrades. The manufacturer emphasizes stable mass production and reliable quality as core attributes of the platform, positioning the Revo 2 as a component that robotics companies can design into products with confidence rather than a one-off research artifact. Operating noise of 50 dB or less at 50 cm and a flexion-extension cycle of 0.65 seconds or faster reflect those prosthetic-grade design roots.

Left-hand configuration within the Revo 2 lineup

The Revo 2 is offered in Basic, Pro, and Touch configurations, each available in left- and right-hand versions; the XRL code designates the Basic left hand. Mechanically, every configuration shares the same 11-DoF layout, 383 g weight, and grip performance. The differences are electronic: the Basic communicates via RS-485 and CANfd on a 12–28 V supply, whereas Pro and Touch add EtherCAT and accept 12–64 V, and the Touch alone carries the multi-dimensional fingertip tactile module with tactile adaptive control. For bimanual robots, the left XRL pairs naturally with the right XRR; in the manufacturer's documentation the default device ID is 126 for a left hand and 127 for a right hand, which lets both hands share one bus without reconfiguration. Documentation for the platform also notes a width of 76 mm in distributor spec tables, a figure worth confirming on the current official datasheet.

Technical Specifications

These values reflect the manufacturer's published materials at the time of writing; always verify them against the latest official documentation during the quotation process before finalizing an integration design.

How does the XRL reproduce human hand motion?

The joint architecture deliberately mirrors human anatomy. Published joint ranges are 0–59° for thumb flexion, 0–90° for thumb abduction/adduction, and 0–81° of flexion for the index through little fingers. Combined with 0.1° repetitive control precision and a 100 mm maximum aperture, the hand can transition between precision pinches and full-envelope power grasps in under 0.65 seconds. Six named motor channels — thumb flex, thumb aux, index, middle, ring, and pinky — are individually addressable, and each reports idle, running, stall, or turbo status back to the host.

What can developers do with the control system?

Quite a lot, because the controller exposes five distinct control modes per joint: position-plus-time for arriving at an exact pose on a schedule, position-plus-speed for velocity-profiled motion, pure speed mode, current mode for direct effort control, and PWM mode for low-level experimentation. Real-time communication up to 1 kHz over RS-485 or CANfd keeps the hand synchronized with fast whole-arm controllers. The Python/C SDK spans Linux, Windows, and ROS, supports customizable gestures, and receives OTA online upgrades.

Who is the BrainCo Revo 2 Basic Left Hand for?

This left-hand unit serves two audiences. The first is teams building bimanual systems — full-size humanoids, dual-arm manipulation cells, and teleoperation rigs — that need a matched left hand alongside the right-hand XRR. The second is any lab or integrator whose application specifically demands left-hand kinematics, such as ergonomic studies, human-robot interaction research, or task setups mirrored from right-handed baselines. It fits research groups, universities, humanoid-platform manufacturers, and automation engineers who want production-grade dexterity, deterministic fieldbus communication, and a mature SDK, but who do not need the fingertip tactile sensing or EtherCAT connectivity reserved for the Touch and Pro configurations.

What is the BrainCo Revo 2 Basic Left Hand used for?

1. Bimanual humanoid builds — completing a left-right hand pair on humanoid robots for two-handed carrying, handover, and coordination tasks.
2. Dual-arm manipulation research — studying coordinated grasping, in-hand manipulation, and force sharing between two dexterous end effectors.
3. Teleoperation and data collection — mirroring a human operator's left hand for remote manipulation rigs and demonstration-based learning setups.
4. Grasping algorithm development — exercising the five control modes, compliance control, and Turbo grip on real hardware through the Python/C SDK.
5. Education and training — teaching kinematics, servo control, and ROS integration with an anthropomorphic 11-DoF platform.
6. Prototype automation cells — validating adaptive gripping of tools, containers, and irregular parts within the hand's 20 kg full-load rating.

Pricing and Availability

The BrainCo Revo 2 Basic Left Dexterous Bionic Hand (XRL) is sold on a request-for-quotation basis, and purchase is confirmed through quotation. Final commercial terms depend on quantity, left/right pairing, destination, and current production allocation. To proceed, submit a quotation request with your project details and required delivery timeline; you will receive a formal offer covering pricing, lead time, and terms for your review before any commitment.

Frequently Asked Questions

Is the XRL mechanically identical to the right-hand XRR?

Yes, apart from mirrored kinematics. Both share the same 11-DoF structure, 383 g weight, 160 mm height, grip figures, and electronics; the documented default device ID differs, 126 for left and 127 for right.

Can I run a left and right hand on the same robot?

Yes. The distinct default device IDs allow a left-right pair to coexist on shared communication infrastructure, which is the intended setup for bimanual humanoid platforms.

Which communication buses does the Basic version support?

RS-485 and CANfd, with communication rates up to 1 kHz. EtherCAT is available only on the Pro and Touch configurations.

Does this version have fingertip tactile sensors?

No. The multi-dimensional fingertip tactile module and tactile adaptive control are exclusive to the Revo 2 Touch; the Basic relies on current-based feedback and compliance control instead.

What are the load and grip ratings?

At least 50 N five-finger grip strength, at least 15 N pinch strength, and at least 20 kg full load, with a 100 mm maximum thumb-to-index opening and joint repeatability of 0.1°.

How do I develop software for it?

Through the manufacturer's SDK, which supports Python and C on Linux, Windows, and ROS, offers five joint control modes and customizable gestures, and receives OTA online firmware upgrades.

Where can I buy BrainCo Revo 2 Basic Left Dexterous Bionic Hand (XRL) and what does it cost?

You can order it through this product page. Pricing is provided by quotation and varies with quantity, configuration, and shipping destination; submit a request for quotation to receive current pricing and lead time, as purchase is confirmed through the quotation process.

Summary

The BrainCo Revo 2 Basic Left Dexterous Bionic Hand (XRL) is the left-hand half of one of the most production-ready dexterous-hand platforms available: 11 degrees of freedom, 6 active motor-driven joints, at least 50 N of grip in a 383 g package, RS-485 and CANfd communication at 1 kHz, and a cross-platform SDK with OTA updates and layered hardware protections. For bimanual humanoids, dual-arm research, teleoperation, and left-hand-specific applications, it offers proven prosthetic-derived engineering in an integrator-friendly form. If you are evaluating dexterous hands for your next platform, this page is the starting point.