In the first quarter of 2026, Zhejiang Shuanghuan Transmission Machinery Co., Ltd. showed strong development momentum.
The company achieved operating income of 3.86 billion yuan, a year-on-year increase of 125%, and a net profit attributable to the parent company of 610 million yuan during the same period, a year-on-year increase of 168%.
The RV reducers it produces account for more than 25% of the domestic market, making it the largest RV reducer manufacturer in the country.
RV reducer is a core component that must be used for the joint positions of industrial robots and humanoid robots.
The revenue of supporting products such as double-ring transmission in the first quarter of 2026 increased by 280% compared with the same period in previous years, and the business growth rate is at the forefront of the industry.
Double Ring Transmission has been rooted in the field of mechanical transmission parts manufacturing for many years. It was established in 2005 and is headquartered in Hangzhou, Zhejiang. Its production bases are distributed in three parks in Yuhuan, Zhejiang and Huaian, Jiangsu, totaling four major production bases.
The company has introduced thousands of precision processing equipment produced in Germany and Japan, and is also equipped with professional gear and reducer testing equipment. The entire testing system can complete multiple index tests such as component accuracy, lifespan, and stability.
From the overall business scope, Shuanghuan Transmission’s products are not limited to the field of robots. Traditional automobiles, new energy vehicles, engineering machinery, rail transit, wind power, power tools and other industries are all using the gears and transmission parts produced by the company.
As of September 2025, the company holds more than 530 technology patents of various types, and has also participated in the formulation of more than 20 national and industry-related standards, with more than 40 years of technology accumulation.
The RV reducer is a precision transmission device. It is divided into two major structural units: an involute cylindrical gear planetary reduction mechanism and a cycloid pinwheel planetary reduction mechanism. The two structures are combined to form a closed differential gear train, which relies on gear meshing to complete speed regulation and power transmission.
It has practical features such as wide adjustable range of transmission ratio, small vibration amplitude, small elastic hysteresis, stable operation accuracy, and high transmission efficiency.
An industrial robot’s waist, legs, elbows and other load-bearing joints usually need to be equipped with four to six RV reducers. The manufacturing cost of these parts can account for 40% to 60% of the total cost of a single industrial robot.
For a long time, the global RV reducer market has been controlled by overseas companies. Japan’s Nabtesco has more than 30 years of relevant technology accumulation and occupied more than 60% of the global market share at its peak.
Overseas leading companies not only control technology, but also set supply thresholds. Products for domestic manufacturing companies are priced higher, and the regular supply cycle is as long as six to twelve months.
Double Ring Transmission officially started the research and development of RV reducers in 2013, and is one of the earliest domestic manufacturing companies in this field.
After years of hard work, we have currently created two major RV reducer product series, E series and C series, which are subdivided into more than a dozen different models and can be adapted to a variety of equipment.
In 2018, Shuanghuan Transmission reached a cooperation with Eft, a domestic industrial robot manufacturing company, marking that its RV reducer products have officially entered the domestic mainstream industrial robot supply chain in batches.
Based on the latest data in 2026, the RV reducers produced by Shuang-ring Transmission accounted for more than 25% of the overall domestic market, ranking first among similar domestic manufacturers.
In the domestic market, the market shares of other RV reducer manufacturers are relatively scattered.
Throughout 2025, the overall market share of domestically produced RV reducers will reach 37%, and domestic products are continuing to replace imported products.
Double-ring transmission can gain a firm foothold in the field of RV reducers, relying on years of continuous technical investment and large-scale production capabilities.
The positioning accuracy of its mass-produced RV reducers can be controlled within twelve arc seconds, and the product’s standard service life reaches 20,000 hours. Compared with imported products of the same specification, the price of domestic products is only 50% to 70% of imported products, with obvious cost-effective advantages.
At the same time, the delivery cycle of finished products is controlled within 45 days, which greatly shortens the production waiting time of downstream robot companies.
Aiming at the current popular field of humanoid robots, Dual Ring Transmission has entered this track very early and specializes in creating miniaturized RV reducers suitable for humanoid robots.
The company has planned a special production line for humanoid robots. Two of them have been put into use so far, and fifteen similar production lines will be added in the future.
At this stage, the company has received a large number of pre-orders, and the number of orders is enough to support the operation of multiple new production lines.
Double Ring Transmission’s overall revenue does not only rely on the reducer business. The traditional gear business is still an important support for the company’s revenue.
For the whole year of 2025, the company’s overall operating income reached 9.112 billion yuan, a year-on-year increase of 3.77%, and the full-year net profit attributable to the parent company was 1.262 billion yuan, a year-on-year increase of 23.21%.
From the perspective of business structure division, the new energy vehicle gear business is the company’s largest business segment. In 2025, this segment’s revenue will be 4.102 billion yuan, accounting for 45.02% of the company’s total revenue. This business will increase by 21.72% year-on-year, and the growth trend will remain stable.
At present, Shuanghuan Transmission has started to expand overseas customers for RV reducers. After stabilizing its domestic market share, it has begun to promote its own brand of RV reducer products to the global market.
In order to allow the RV reducer business to gain independent development space, the company spun off its subsidiary Huandong Technology, which focuses on the research and development, production and sales of reducers, and promoted the company to be listed on the Science and Technology Innovation Board.
Looking at the entire domestic reducer industry, from 2021 to 2026, the overall demand for reducers required for domestic industrial robots is expected to reach 7.76 million units, and the market demand is huge.
The market size of the domestic general reducer industry is also growing, and the entire transmission parts industry has room for long-term development.
In terms of production technology, Double Ring Transmission integrates many years of gear manufacturing process experience and applies it to the production of RV reducers.
The company is equipped with professional equipment and controls product quality throughout the entire process.
In terms of production capacity construction, the original RV reducer production line continues to be optimized and upgraded, and the overall production capacity is steadily increased.
From the perspective of cost control, large-scale production can reduce the unit price of products and enhance the market competitiveness of domestic products.
The expansion of downstream application scenarios is also continuing to open up the market space for RV reducers.
While Double Ring Transmission is deeply involved in RV reducers, it is simultaneously promoting the market promotion of harmonic reducers to meet the parts procurement needs of robot manufacturers in one stop.
If the domestic precision reducer industry wants to completely get rid of overseas technical constraints, it still needs three to five years of continuous development.
In the future, Shuanghuan Transmission will continue to tap into the domestic market on the one hand, and steadily advance its overseas market layout on the other.
At the same time, we will continue to promote production line upgrades and capacity expansion to match market orders.
At the technology research and development level, the company will continue to optimize RV reducer products in four directions: miniaturization, lightweight, long life, and high precision.
The entire domestic precision machinery parts manufacturing industry is transforming from low-end processing to high-end precision manufacturing.
Local companies represented by Double Ring Transmission rely on long-term technology accumulation, continuous capital investment, and large-scale production capabilities to gradually break the long-term market structure formed by overseas companies and provide supporting support for the domestic robot industry and high-end equipment manufacturing industry.
Up to now, all businesses of Shuanghuan Transmission are operating normally, existing production capacity can meet current order demand, and new production lines are being constructed in an orderly manner as planned.
As a new growth segment, the robot reducer business is growing faster than the company’s other businesses. With the gradual implementation of the humanoid robot industry, there is room for further improvement in this segment.
The company relies on the foundation of gear manufacturing and superimposes the new growth point of precision reducers, and the overall development status remains stable and upward.
