Inspire Robots

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Beijing Inspire-Robots Technology Co., Ltd. (Chinese: 北京因时机器人科技有限公司; trading as Inspire Robots or 因时机器人) is a Chinese robotics-component maker, founded in Beijing in 2016, that produces micro linear servo actuators and five-finger dexterous hands. Its RH56 series is one of the most widely deployed off-the-shelf robot hands in China, fitted to humanoid robot platforms including the Unitree G1 and used across university and industry research labs. The company says it delivered more than 10,000 dexterous hands in 2025, a figure that, if accurate, places it among the largest suppliers of complete robot hands by unit volume. ^[1][2]

Company and history

Inspire Robots was founded in May 2016 in Beijing by Cai Yingpeng (蔡颖鹏), a robotics graduate of Beihang University (the Beijing University of Aeronautics and Astronautics), who remains chairman and chief executive. Cai had run an earlier project-based robotics venture that he wound down at the end of 2015 after concluding it had hit a growth ceiling; Inspire was started to sell standardized motion-control components rather than one-off custom builds. Chen Xi (陈曦) is named as a co-founder in corporate filings. ^[3]

The company's first product was not the hand but the actuator inside it. Inspire set out to build a very small, integrated linear servo unit, essentially a miniature electric cylinder, that packs a coreless (hollow-cup) motor, a precision planetary reducer, a position sensor, a lead screw and a closed-loop driver into a single slim module. Having built a first generation of these micro linear servo actuators, the company used six of them to drive the fingers of a five-finger hand, launching its dexterous hand in 2020. Inspire describes this hand as China's first commercially mass-produced dexterous hand, and the earlier "anthropomorphic five-finger dexterous hand" was named one of China's top ten robotics technology advances for 2018 and later drew support under the National Key R&D Program. ^[1][4][15]

Inspire is organized across three sites: Beijing serves as the research and development headquarters, a Suzhou subsidiary (established 2019) is the manufacturing base, and a Shenzhen subsidiary (established 2022) handles sales. The company reports holding dozens of domestic and international invention patents on its actuators and hands; secondary industry profiles cite figures of more than 70, and in some accounts more than 80. Products carry CE, RoHS, FCC and ISO 9001 certifications for export. ^[1][19]

By its own account the business grew quickly as the humanoid wave arrived. Inspire says cumulative actuator sales passed 10,000 units in 2021, dexterous-hand deliveries reached roughly 2,000 units in 2024, and deliveries then exceeded 10,000 units in 2025, with international sales growing sharply. It raised an over-100-million-yuan Series B2 round in September 2024 and a further round of about 100 million yuan (a "B3" tranche) in April 2025, backed by investors including Huagai Capital, Shenqi Capital and Yuanhe Capital. No independently audited valuation has been published, so those funding figures should be read as reported rather than confirmed. ^[2][3]

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Products

Dexterous hands (RH56 series)

Inspire's flagship line is the RH56 family of five-finger anthropomorphic hands. The mechanical architecture is consistent across the series: each hand has 6 active degrees of freedom driven by 6 micro linear servo actuators, arranged so that four fingers flex individually and the thumb both flexes and rotates laterally into opposition. Those 6 driven axes move roughly 12 articulated joints through internal linkages, so the hand looks and moves like a human hand while using far fewer motors than there are visible knuckles. It is important not to conflate the three counts: 6 motors, 6 active DOF, and about 12 joints describe the same hand. The base models integrate six force sensors and can grasp and hold objects of up to about 3 kg. ^[5][12][13]

The variants differ mainly in force, speed, tactile sensing and interface rather than in that core layout:

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A few distinctions are worth spelling out. The RH56DFX is the workhorse "high force" hand, closing in about 0.8 seconds with 15 N of thumb fingertip force. The RH56BFX trades force for speed: it closes in roughly 0.4 seconds and reaches four-finger flexion speeds around 570 degrees per second, but its fingertip force is much lower (Inspire also quotes a higher "grip" or holding force, which is a separate measurement from fingertip pushing force, so store listings can look contradictory). The RH56DFQ is a DFX-class hand widely sold on marketplaces and bundled with some Unitree configurations. ^[5][9][12]

The RH56E2 is the heavy-load, sensor-rich member of the family: about 30 N of thumb and 28 N of finger fingertip force, a force resolution of 0.05 N (roughly ten times finer than the DFX/BFX), and an integrated tactile array offered in a 17-sensor resistive version (0 to 30 N range) or a 5-sensor capacitive version (0 to 20 N). The closely related RH56DFTP carries a 17-point fingertip tactile array on DFX-class mechanics and is the version Inspire supplies for tactile sensing applications on humanoids. The RH56F1 and RH56H1, introduced for 2025 and 2026, move to all-metal bodies, 1 kHz EtherCAT or CAN FD communication, and far denser sensing: the F1 fuses 24 tactile, force, position and temperature sensors, while the compact H1 packs 260 tactile points (170 on the fingertips plus 90 in the palm). ^{[6][7][8][22]}

(Note: an "RH8D" adult hand sometimes associated with Inspire is in fact a separate product from Seed Robotics in the United Kingdom, not an Inspire model.) ^[5]

Micro linear servo actuators

Inspire continues to sell the actuators themselves as standalone components, and they remain a large part of the business. Each micro linear servo actuator integrates a coreless motor, a metal-gear planetary reducer, a high-precision sensor, a lead-screw mechanism and an integrated servo driver in one package. Because an absolute position sensor is built in, the module does not lose its position or need to re-home after a power cut, and it self-locks when unpowered. A representative unit, the LA30, offers a 30 mm stroke, up to 50 N of force, plus or minus 0.06 mm positioning precision, and a mass of about 30 g. The catalogue spans several sizes and variants (the LA, LAF, LAS, LASF and BLA series), sold through LVTTL serial or PWM interfaces, and marketed beyond robotics into new energy, 3C electronics, semiconductor and biomedical equipment. Inspire also sells electric grippers built on the same actuator technology. ^[1][10][11]

How the hands work

Inspire's core design choice is a linkage plus lead-screw transmission rather than a cable (tendon) or direct-drive layout. Inside each finger, one micro linear servo actuator pushes and pulls a linkage that flexes the finger; the lead screw gives the joint mechanical advantage and self-locking, so a grasped object stays held even if power is cut. Control combines position and force in a hybrid loop: the hand can be commanded to a target finger angle or to a target contact force, with position repeatability quoted at about plus or minus 0.2 mm and force resolution from 0.5 N on the base models down to 0.05 N on the RH56E2. The tactile-equipped models add contact sensing across the fingertips and palm, which matters for stable grasping and for robot manipulation where slip and contact force must be sensed rather than guessed. ^[4][5][6]

For integrators, the practical appeal is interfaces and software. The hands speak RS485 and CAN (with Modbus TCP, EtherCAT or CAN FD on higher models), run on 24 V (up to 48 V on the newer hands), and ship with SDKs plus ROS and ROS 2 support, including published plugins and example controllers. That has made the RH56 a common default hand for teams who want to work on grasping and learning without designing their own end-effector. ^[5][6][13]

Adoption and integrations

The RH56 series is best known as the hand that many other robots borrow. The most visible example is Unitree: the RH56DFX and RH56DFQ are officially supported hands for the Unitree G1 humanoid (the G1 EDU Ultimate configurations), and the tactile RH56DFTP is offered on higher G1 EDU tiers and the Unitree H2, where a pair of Inspire hands can push whole-robot degrees of freedom into the low 40s. Unitree maintains open-source controller code (its dfx_inspire_service package) and developer documentation specifically for the Inspire hand, which lowers the barrier for buyers to swap it onto a G1. ^[12][13][14]

Beyond Unitree, Inspire sells the hands internationally through a network of distributors and online stores (including US Robot Store, Knox Labs, Generation Robots in Europe and RBTX), and lists models such as the RH56DFQ directly on Amazon, where the base hand is described as a "3 kg strong grip" five-finger hand with six integrated force sensors. Chinese trade coverage has also named Agility and skild AI among Inspire's customers. This off-the-shelf availability, priced from roughly $4,500 to about $10,000 depending on force and sensing, has made the RH56 a fixture in embodied AI and manipulation research, where labs want a capable, repairable hand they can buy today rather than build. ^{[6][7][9][12][16]}

Market position and competitors

Inspire is generally described as one of the two or three most important Chinese dexterous-hand suppliers, and specifically as the first to reach commercial mass production of a five-finger hand. Its reported 2025 delivery of more than 10,000 hands (up from roughly 2,000 in 2024) is a company figure; it is widely repeated in industry press and, if accurate, would make Inspire one of the highest-volume suppliers of complete hands, with the company targeting 50,000 to 100,000 units in 2026. These numbers should be attributed to Inspire rather than treated as audited. ^[2][16]

The competitive field is often sorted by transmission philosophy, and Inspire sits firmly in the linkage-drive camp. Rivals pursue different routes: tendon (cable) drive, used in hands such as those from Xynova and Linkerbot (Linkerbot in fact offers tendon, direct-drive and linkage variants), aims for more independent finger joints and higher total DOF; the Wuji Hand is associated with a direct-drive approach; and ZWHAND is another domestic peer, alongside tactile-focused makers such as PaXini Technology and the AgiBot-incubated AGILINK (see AgiBot). Inspire's linkage-plus-lead-screw design typically yields fewer active DOF (6) than the high-DOF tendon hands (which can reach the high teens or twenties), but in exchange it delivers self-locking grip, mechanical robustness, and a mature, mass-produced supply chain, which is much of why it dominates the mainstream 6-DOF segment even as tendon specialists lead the high-DOF niche. ^[4][17][18]

Market-size estimates for Chinese dexterous hands vary widely. The research firm GGII, for example, projected China's shipments rising from roughly 19,000 units in 2025 to about 70,000 in 2026 and past 430,000 by 2030; other trackers put 2025 whole-market shipments above 30,000 units. Different firms use very different assumptions, so no single figure is authoritative. ^[17][18]

Reception

Inspire is widely credited, in both Chinese trade media and the international humanoid-hardware community, as the company that made a usable five-finger hand something you could simply order. Reviewers praise the RH56's integration (motors, sensors and controller all inside the hand), its ROS support, its self-locking grip, and its low price relative to Western research hands. The main criticism tracks the design trade-off: with 6 active DOF the hand is less capable at fine in-hand manipulation than high-DOF tendon hands, and the earlier non-tactile models gave only coarse force feedback. Inspire's 2025-2026 roadmap (dense tactile arrays on the F1 and H1, higher-force sensing on the E2, and stated work on tendon and direct-drive lines) reads as a direct answer to those critiques. ^[7][8][18]

ELI5

A robot needs a hand to pick things up. Building a hand with a separate motor for every knuckle would make it huge and heavy, so Inspire uses a clever trick: six tiny push-pull motors (each one a little screw-driven cylinder) pull on links inside the fingers, and those links bend all the finger joints. That gives a five-finger hand that can make a fist, pinch, and hold something as heavy as a small bag of sugar, while feeling how hard it is squeezing. Because the hand comes ready to plug in and program, lots of other robots, like Unitree's humanoids, just buy Inspire's hand instead of inventing their own.

See also

• Dexterous hand
• Tactile sensing
• Humanoid robot
• Robot manipulation
• Embodied AI
• Degrees of freedom
• Unitree and the Unitree G1
• Xynova, Linkerbot, Wuji Hand, ZWHAND, PaXini Technology
• China AI

References

1. Inspire Robots, "About INSPIRE ROBOTS." en.inspire-robots.com/about-us ↩
2. Inspire Robots, "Ten Years of Ups and Downs in The Dexterous Hand Sector, INSPIRE ROBOTS Delivers Answers with Ten-Thousand-Unit Delivery and Spring Festival Gala Debut." en.inspire-robots.com/news/7719.html (2026) ↩
3. Tencent News / 36Kr, "专注微型伺服电缸和灵巧手研发与量产，因时机器人完成近亿元B3轮融资" (Inspire Robots completes nearly-100-million-yuan Series B3 round). news.qq.com, 29 April 2025 ↩
4. Inspire Robots, "Give robots a pair of 'human hands'." en.inspire-robots.com/default/4715.html ↩
5. Knox Labs, "Inspire Robots RH56DFX Dexterous Hand." knoxlabs.com ↩
6. Knox Labs, "Inspire Robots RH56E2 Dexterous Hand." knoxlabs.com ↩
7. Knox Labs, "Inspire Robots RH56F1 Dexterous Hand." knoxlabs.com ↩
8. Knox Labs, "Inspire Robots RH56H1 Dexterous Hand." knoxlabs.com ↩
9. US Robot Store, "Inspire Robots 5-Finger Robotic Dexterous Hand RH56BFX." usrobotstore.com ↩
10. Inspire Robots, "LA30 Series Micro Linear Servo Actuator." en.inspire-robots.com/product/la30-series ↩
11. Inspire Robots, "Micro Linear Servo Actuator" product category. en.inspire-robots.com/product-category/micro-linear-servo-actuator ↩
12. Amazon, "INSPIRE Robots Humanoid Five-Fingers Robot Hand, 3KG Strong Grip, Integrated 6 Force Sensor, RH56DFQ-2L." amazon.com ↩
13. Unitree, "Inspire DFX Dexterous Hand" (G1 developer documentation). support.unitree.com/home/en/G1_developer/inspire_dfx_dexterous_hand ↩
14. Unitree Robotics, "dfx_inspire_service: Unitree Robot RH56DFX Inspire Hand Controller." github.com/unitreerobotics/dfx_inspire_service ↩
15. Xinhua, "人形机器人进化'带火'灵巧手产业" (Humanoid evolution ignites the dexterous-hand industry). news.cn, 19 May 2025 ↩
16. China.com Tech, "人形机器人万人盛会在即，国产灵巧手四顶流（四小龙）齐上阵" (China's dexterous-hand "four dragons"). m.tech.china.com, 12 April 2025 ↩
17. Aibang Robotics, "'灵巧手'进化之路" (The evolution of the dexterous hand; cites GGII shipment forecasts). aibangbots.com ↩
18. DayDayUp, "China's Dexterous Hand Boom: Billions Surge into the Robot Manipulation Layer." dduwork.com, 19 June 2026 ↩
19. Humanoid Robotics Technology, "Inspire Robots: Pioneer of Micro Linear Servo Actuator and Dexterous Hands." humanoidroboticstechnology.com/company/inspire-robots ↩
20. Inspire Robots, "The Dexterous Hand RH56 Series User Manual" (PDF). en.inspire-robots.com
21. Inspire Robots, "The Dexterous Hand RH56DFTP User Manual V1.0.0" (PDF, January 2025). en.inspire-robots.com
22. Humanoid.guide, "RH56E2 Series: Tactile Robotic Hand by Inspire Robots." humanoid.guide/product/rh56e2 ↩