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NOUSBOT’s 1.5-mm Planetary Roller Screw and Its Micro-Actuator Strategy
NOUSBOT claims to mass produce a 1.5 mm diameter planetary roller screw rated at C5 precision, ±0.01 mm repeat positioning and 50 N maximum load. Its integrated micro linear actuator measures about 8 mm × 10.2 mm and is reported to deliver up to 15 kgf of thrust, while a planned feedback enabled version adds force,...
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Key takeaways
- NOUSBOT claims to mass produce a 1.5 mm diameter planetary roller screw rated at C5 precision, ±0.01 mm repeat positioning and 50 N maximum load.
- Its integrated micro linear actuator measures about 8 mm × 10.2 mm and is reported to deliver up to 15 kgf of thrust, while a planned feedback enabled version adds force, position and temperature monitoring.
- Founded in Shenzhen in July 2023, NOUSBOT has raised four reported financing rounds and is pursuing applications across humanoid hands, larger robot joints, automotive systems, medical devices, battery equipment, semi...
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openai.comCreate a landscape editorial hero image for this Studio Global article: What is NOUSBOT’s business, funding, founding and manufacturing background, technical achievement in mass-producing the world’s smallest 1.5. Article summary: NOUSBOT is a Chinese precision-transmission supplier positioning itself as a scalable manufacturer of miniature planetary roller screws and integrated micro linear actuators—not principally as a humanoid-robot maker. Its. Topic tags: general, general web, user generated. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, watermarks, charts with fa
NOUSBOT is not primarily a humanoid-robot maker. It is a precision-transmission company developing planetary roller screws, integrated linear actuators and related motion components for robots and industrial equipment. Its headline product is a claimed 1.5-mm-diameter planetary roller screw, but the company’s larger proposition is the ability to manufacture miniature, high-force actuators at an industrial scale. 1
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That distinction matters. A tiny component can attract attention; repeatable production, acceptable cost, long service life and customer qualification determine whether it becomes part of a robot’s bill of materials.
What NOUSBOT makes
NOUSBOT’s portfolio covers conventional screws, planetary roller screws, micro linear electric cylinders and higher-force joint actuators. The company describes this as a “force matrix”: products ranging from roughly 3 kg to 1,000 kg of output, aimed at applications including humanoid robots, surgical robots, lithium-battery coating equipment, semiconductor optical modules and low-altitude aviation. 1
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For humanoid robots, the immediate target is the dexterous hand. A miniature linear actuator can give each finger an independent drive mechanism in a space where conventional actuators, linkages or cable systems may be difficult to package. Reported example tasks include pinching a pill, turning a key and tying a shoelace. 4
The company is also developing larger linear actuators for robot limbs. Its own materials describe a reverse planetary-roller-screw electric-cylinder series for thigh and forearm applications with maximum thrust of up to 8,000 N, although these are company-reported specifications rather than independently benchmarked results. 5
The 1.5-mm planetary roller screw
NOUSBOT says it has achieved mass production of a planetary roller screw with a screw diameter of 1.5 mm and a nut diameter of 5.5 mm. The reported specifications are:
- Screw diameter: 1.5 mm
- Nut diameter: 5.5 mm
- Precision grade: C5
- Repeat positioning accuracy: ±0.01 mm
- Maximum reported load: 50 N
- Reported service life: more than 3 million cycles
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Some company and media materials describe the load as approximately 10 kg, while other reports give the more specific 50 N figure. Those figures should not be treated as interchangeable without knowing the test conditions and whether they refer to the screw, actuator or a different product configuration. 6
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The technical achievement is less about inventing planetary roller screws than shrinking and manufacturing them consistently. At this scale, the internal thread, roller geometry, grinding process and heat-treatment deformation all become difficult to control. Industry coverage describes the challenge as producing fine internal threads in a narrow bore while maintaining micron-level precision and avoiding batch-level failures caused by small process deviations. 8
The company’s public claim is therefore best understood as a manufacturing claim: NOUSBOT says it has moved a miniature planetary roller screw from a difficult prototype or sample product toward repeatable production. The available sources do not provide an independent audit of its global “smallest” ranking or production yield.
The USB-drive-sized micro actuator
NOUSBOT integrates the miniature screw with a brushless motor and non-contact sensing to create a micro linear electric cylinder. Reported dimensions are approximately 8 mm × 10.2 mm, with a claimed thrust of up to 15 kgf in a volume described as roughly USB-drive-sized. 4
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The combination is important because the actuator, rather than the screw alone, is the useful system-level product. Integrating the motor and sensing reduces the packaging burden for a robot maker and can support independent actuation of compact mechanisms such as fingers.
The product’s practical value will depend on more than peak thrust. Buyers would also need to evaluate continuous-load behavior, speed, efficiency, backlash, noise, thermal performance, control bandwidth, durability and consistency across production lots. Those details are not fully disclosed in the provided public materials.
What the next-generation feedback actuator adds
NOUSBOT is also developing an integrated “smart” electric cylinder with force, position or precision, and temperature feedback. The reported objective is to monitor force variation at roughly the 1% level and alert the system when heat-related motor degradation occurs. The resulting sensor data would be returned to a robot’s higher-level and lower-level control systems for closed-loop operation. 10
This is a product-development target, not an independently verified benchmark. If achieved in a small actuator, the feedback could help robots detect contact, regulate gripping force and compensate for thermal or mechanical changes. It could also make actuator qualification more demanding, because the sensor, motor, screw and control electronics would all need to remain reliable as one system.
Why NOUSBOT favors screw-based linear joints
NOUSBOT founder Xu Yang argues that compact rotary joints face a difficult trade-off: they must deliver high torque in a small package, and motors can spend significant time near stall conditions, producing heat. The company’s preferred alternative is a screw-integrated linear joint.
A screw mechanism can provide self-locking under some designs and operating conditions. That may allow the motor to operate intermittently while the mechanism holds a load, which NOUSBOT says can reduce heat and energy use and extend motor life. 2
The argument should not be generalized into a rule that linear joints are always better than rotary joints. Self-locking, efficiency, back-drivability, controllability and safety depend on the screw geometry, lubrication, load, speed and complete actuator design. A self-locking mechanism can also make force control and back-drivability more difficult in applications that require compliant interaction. NOUSBOT’s position is best viewed as a design thesis for specific humanoid-joint constraints, not a universal engineering conclusion.
The market problem: dexterity is advancing faster than reliability
NOUSBOT sees demand expanding beyond fingers to wrists, forearms, necks and facial-expression mechanisms. Xu Yang said neck requirements were moving from roughly one or two degrees of freedom toward four to six, increasing the need for compact transmission components in the head and neck. 2
The company’s own market assessment is cautious. Xu reportedly said that most dexterous hands on the market in 2025 were not yet practically reliable and often failed after around 200 hours, while products appearing in 2026 could perform simple tasks but remained short of industrial-grade reliability. These statements describe the company’s assessment, not a comprehensive industry benchmark. 2
That reliability gap creates an opening for component suppliers. A miniature actuator must survive repeated loads while maintaining precision in a very constrained volume. However, it also raises the bar: a robot maker will judge the actuator by system-level uptime, not by its smallest diameter or highest advertised thrust.
Capacity is the near-term bottleneck
NOUSBOT says its Suzhou factory is operating around the clock at an annual capacity of approximately 3 million screws, with demand exceeding supply. Following its latest financing, the company stated a goal of raising capacity to 10 million screws by the end of 2026. 3
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The company has also used a scenario of 1 million humanoid robots requiring roughly 30 million planetary roller screws to illustrate the potential gap between future demand and available supply. That is a planning scenario rather than a market forecast: the number of screws per robot, the adoption rate of screw-based joints and actual robot deployments can vary substantially. 2
The manufacturing ramp is consequently a more meaningful near-term test than the headline size claim. NOUSBOT must increase output without sacrificing C5 precision, service life, yield or delivery consistency. Its Suzhou high-end manufacturing base officially entered production in March 2026. 12
Founding, team and financing
NOUSBOT was founded in Shenzhen in July 2023 and grew out of a family business with more than 30 years of screw-manufacturing experience. Founder and chairman Xu Yang has a master’s degree in mechanical manufacturing from Tongji University and previously led research and development at Valeo’s Asia-Pacific R&D center. CEO Wang Xiaobin previously served as a deputy general manager of a Valeo subsidiary. The company lists research and development in Shenzhen and manufacturing operations in Shanghai and Suzhou. 3
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The company has completed four reported financing rounds. Its latest A+ round, announced in August 2026, raised nearly RMB100 million, with Shunwei Capital leading and Wangqian Capital, an investment vehicle associated with CATL, participating. The stated uses were production-capacity expansion, product iteration and overseas-market development. Earlier reported investors include SAIC Venture Capital, Pudong Science and Technology Investment and Lenovo Capital. 1
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A separate Series A announced in March 2026 exceeded RMB100 million, according to reports. Shanghai Semiconductor Industry Investment led the round, with Lenovo Capital and Amber Capital participating; Keli Machinery and Pengling made strategic investments, and SAIC-related capital continued to invest. 14
The financing mix is strategically relevant. Industrial and automotive investors can potentially support customer qualification and manufacturing relationships, while financial investors provide capital for capacity and product development. Funding alone, however, does not establish production yield, recurring revenue or long-term customer commitments.
Automotive diversification and pricing goals
NOUSBOT is attempting to reduce its dependence on the still-developing humanoid-robot market by applying its transmission technology to automotive systems. The company reports eight design wins in a Yanfeng Seating project and says automotive and robotics each account for approximately half of its business. It has also described work involving intelligent seating, steer-by-wire and suspension-related applications. 3
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Reports also describe a goal of moving miniature planetary roller-screw pricing from imported thousand- or ten-thousand-yuan levels toward the hundreds-of-yuan range. That pricing claim is not accompanied in the provided sources by public contract values, audited cost data or confirmed production volumes, so it should be treated as a company or market report rather than an established market price. 3
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The automotive path could provide a more diversified commercial base, but it introduces demanding qualification requirements. Automotive customers typically require validated reliability, traceability, process control and long production support. Those requirements are different from the development cycles of humanoid-robot startups.
The strategic question: component moat or manufacturing platform?
NOUSBOT is explicitly trying not to rely on a single “world’s smallest” product. Its broader strategy is to reuse precision manufacturing, motor-and-sensor integration and force-control expertise across a range of actuator sizes and industries. 10
That strategy has two potential advantages. First, diversification could reduce exposure to uncertain humanoid-robot volumes. Second, improvements in manufacturing processes could be applied across multiple product families rather than being confined to one miniature screw.
The trade-off is execution complexity. Robotics, automotive, medical equipment, battery manufacturing, semiconductor equipment and aviation each impose different requirements for qualification, safety, reliability, cost and service. NOUSBOT’s central challenge is therefore not simply proving that a 1.5-mm screw can work. It is demonstrating that the underlying manufacturing platform can produce reliable actuators at the volume, price and performance levels that several demanding markets require.
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NOUSBOT claims to mass produce a 1.5 mm diameter planetary roller screw rated at C5 precision, ±0.01 mm repeat positioning and 50 N maximum load.
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NOUSBOT claims to mass produce a 1.5 mm diameter planetary roller screw rated at C5 precision, ±0.01 mm repeat positioning and 50 N maximum load. Its integrated micro linear actuator measures about 8 mm × 10.2 mm and is reported to deliver up to 15 kgf of thrust, while a planned feedback enabled version adds force, position and temperature monitoring.
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Founded in Shenzhen in July 2023, NOUSBOT has raised four reported financing rounds and is pursuing applications across humanoid hands, larger robot joints, automotive systems, medical devices, battery equipment, semi...