

Introduction to QDY-HS1 Harmonic Reducer
The QDY-HS 1 series flexure features a hollow, flanged standard cylindrical structure, resulting in a compact overall design. The input shaft directly mates with the inner hole of the wave generator via a key. It can be used with either a fixed rigid wheel end and an output flexure end, or vice versa.
QDY-HS1 Harmonic Reducer Performance Parameter Table
Model/Project | Reduction ratio | Rated torque at 2000 rpm input | Maximum allowable torque during start-up and shutdown | Maximum allowable torque under average load | Instantaneous maximum allowable torque | Maximum permissible input speed (for grease) | Permissible average input speed (grease) | Back gap | Design life |
NM | NM | NM | NM | RPM | RPM | Arc Sec | Hours | ||
14 | 50 | 5.4 | 18 | 6.9 | 35 | 7500 | 3500 | ≤30 | >10000 |
80 | 7.8 | 23 | 11 | 47 | ≤30 | >10000 | |||
100 | 7.8 | 28 | 11 | 54 | ≤30 | >10000 | |||
17 | 50 | 16 | 34 | 26 | 70 | 7000 | 3500 | ≤30 | >10000 |
80 | 22 | 43 | 27 | 87 | ≤30 | >10000 | |||
100 | 24 | 54 | 39 | 110 | ≤30 | >10000 | |||
20 | 50 | 25 | 56 | 34 | 98 | 6000 | 3500 | ≤30 | >10000 |
80 | 34 | 74 | 47 | 127 | ≤30 | >10000 | |||
100 | 40 | 82 | 49 | 147 | ≤30 | >10000 | |||
120 | 40 | 87 | 49 | 147 | ≤30 | >10000 | |||
25 | 50 | 39 | 98 | 55 | 186 | 5500 | 3500 | ≤30 | >10000 |
80 | 63 | 137 | 87 | 355 | ≤30 | >10000 | |||
100 | 67 | 157 | 108 | 284 | ≤30 | >10000 | |||
120 | 67 | 167 | 108 | 304 | ≤30 | >10000 | |||
32 | 50 | 76 | 216 | 108 | 382 | 5000 | 3500 | ≤30 | >10000 |
80 | 118 | 304 | 167 | 568 | ≤30 | >10000 | |||
100 | 137 | 333 | 216 | 647 | ≤30 | >10000 | |||
120 | 137 | 353 | 216 | 686 | ≤30 | >10000 |
Product Introduction:
Harmonic Gear Reducers consist of a fixed internal gear, a flexible gear, and a wave generator that causes radial deformation of the flexible gear. Harmonic Gear Reducers are a new type of transmission structure among gear reducers. They utilize the controllable elastic deformation wave generated by the flexible gear to cause relative tooth misalignment between the teeth of the rigid and flexible gears, thereby transmitting power and motion. This transmission method differs fundamentally from ordinary gear transmission, possessing unique characteristics in meshing theory, set calculations, and structural design. Harmonic gear reducers offer advantages such as high precision and high load-bearing capacity. Compared to ordinary reducers, they use 50% less material, reducing their volume and weight by at least one-third.
Core Features:
Small and lightweight; High transmission precision; Large transmission ratio; Simple and compact structure, easy installation; High load-bearing capacity, capable of transmitting motion to confined spaces; High transmission efficiency, smooth operation.
Product Characteristics:
High dynamic precision and accurate control: Multi-tooth meshing achieves error averaging, resulting in small transmission errors and enabling zero or low backlash meshing. Reverse transmission has no idle stroke, providing outstanding positioning accuracy.
Wide transmission ratio range and strong adaptability: Single-stage transmission ratios can reach 30~320, and double-stage transmission ratios can reach thousands, meeting different speed requirements without complex transmission chains.
High load-bearing capacity and high reliability: The tooth surfaces are in surface contact, resulting in uniform force distribution. The flexible wheel is made of high-strength materials, ensuring high load-bearing capacity.
Compact structure and lightweight design: Composed of only three core components—a rigid wheel, a flexible wheel, and a wave generator—it is small in size and light in weight, facilitating installation in confined spaces.
Smooth transmission and high efficiency: Gradual entry and exit meshing of the gear teeth eliminates impact, resulting in low operating noise and vibration.
Unique functional characteristics and wide applicability: Coaxial design of input and output shafts facilitates easy installation and provides strong transmission stability.
Application Examples
Six-axis/multi-axis industrial robots, CNC rotary tables, laser cutting
At Qiandeyi Transmission Technology (Suzhou) Co., Ltd., we focus on the research, development, manufacturing, and service of Precision Transmission Components for intelligent automation equipment. Since our establishment in 2013, we have been committed to providing reliable drive solutions for customers in industrial robotics, CNC machining, automated production lines, logistics systems, new energy equipment, and intelligent manufacturing industries.
Our QDY-HS1 Harmonic Gear Reducers are developed for applications that require high precision motion control, low backlash, compact structure, and stable torque transmission. By using advanced harmonic transmission technology and strict manufacturing processes, the QDY-HS1 series provides accurate speed reduction and reliable output performance for precision automation systems.
In modern manufacturing, equipment performance is closely related to the quality of the transmission system. Machines are becoming faster and more intelligent, which means reducers need to provide higher accuracy, better response speed, and stronger reliability during long-term operation.
The QDY-HS1 Harmonic Gear Reducers use a Precision Harmonic Drive structure composed of a wave generator, flex spline, and circular spline. Through controlled elastic deformation, the product achieves high reduction ratio, low backlash, and stable torque output in a compact size.
We provide standard and customized QDY-HS1 Harmonic Gear Reducers according to different equipment requirements. Our engineering team evaluates reduction ratio, rated torque, installation dimensions, accuracy requirements, backlash level, and operating conditions to provide suitable transmission solutions.
The QDY-HS1 Harmonic Gear Reducers are precision transmission components designed for industries that require accurate movement and stable power transmission. As a high precision harmonic gear reducer, the QDY-HS1 series helps automation equipment achieve smooth operation and reliable positioning performance.
Unlike traditional gear reducers that mainly depend on rigid gear engagement, harmonic gear reducers use flexible deformation technology to achieve precise transmission. This structure allows multiple teeth to engage simultaneously, improving transmission accuracy and reducing mechanical error.
The main components of the QDY-HS1 Harmonic Gear Reducers include the wave generator, flex spline, and circular spline. These components work together to convert high-speed motor input into low-speed and high-torque output movement.
During operation, the motor drives the wave generator, which creates continuous deformation of the flex spline. The flex spline then engages with the circular spline through precise tooth contact, generating the required reduction effect.
Because of the unique harmonic transmission structure, the QDY-HS1 series can achieve high reduction ratios while maintaining compact dimensions. This makes it especially suitable for applications where installation space is limited but precision requirements are high.
The QDY-HS1 Harmonic Gear Reducers are widely used in industrial robots, collaborative robots, robotic arms, CNC equipment, semiconductor machines, new energy equipment, precision inspection systems, and automated manufacturing lines.
High Precision Transmission: The harmonic drive structure provides accurate movement control and improves positioning performance for precision equipment.
Low Backlash: Optimized component design reduces transmission clearance and supports repeated positioning applications.
Compact Design: The reducer provides high reduction performance within a small structure, helping engineers save installation space.
High Torque Density: Multiple tooth engagement improves load distribution and supports stable torque output.
Smooth Operation: Precision manufacturing helps reduce vibration and noise during continuous operation.
Feature | QDY-HS1 Harmonic Gear Reducers | Application Advantage |
Transmission Structure | Wave generator, flex spline, and circular spline design | Provides accurate harmonic transmission |
Backlash Performance | Low backlash precision structure | Improves repeat positioning accuracy |
Size Design | Compact structure with high reduction ratio | Suitable for limited installation spaces |
Torque Output | Multi-tooth engagement transmission | Provides stable power output |
Source: Technical characteristics are based on harmonic transmission principles and Qiandeyi Transmission Technology product development experience.
The working principle of QDY-HS1 Harmonic Gear Reducers is based on harmonic drive technology. The system uses controlled elastic deformation to achieve accurate transmission between the input and output components.
The wave generator is connected with the input shaft. When it rotates, it changes the shape of the flex spline and creates controlled engagement with the circular spline.
The difference in the number of teeth between the flex spline and circular spline creates the reduction effect. This allows the reducer to achieve high reduction ratios with fewer mechanical components.
This structure provides several advantages, including low backlash, high positioning accuracy, compact dimensions, and smooth movement.
For robotic joints and precision automation equipment, stable and accurate movement is essential. The QDY-HS1 Harmonic Gear Reducers help equipment maintain consistent performance during frequent operation cycles.
Comparison Item | QDY-HS1 Harmonic Gear Reducers | Traditional Gear Reducers |
Transmission Method | Elastic deformation harmonic transmission | Rigid gear engagement |
Precision | High precision with low transmission error | Depends on gear clearance control |
Backlash | Low backlash design | Usually requires mechanical adjustment |
Structure Size | Compact and lightweight | Usually larger for similar performance |
Main Application | Robotics and precision automation | General Industrial Transmission |
Source: Comparison is based on general transmission structure characteristics and industrial application requirements.

The performance of a harmonic gear reducer depends on the combination of structural design, machining accuracy, material quality, and assembly technology. At Qiandeyi Transmission Technology, we focus on every production detail to ensure that the QDY-HS1 Harmonic Gear Reducers provide stable and accurate transmission performance in demanding industrial environments.
With the continuous development of intelligent manufacturing, automation equipment requires smaller, lighter, and more accurate transmission components. The QDY-HS1 series is designed to meet these requirements by providing high precision motion control and reliable torque transmission.
Precision is one of the most important requirements for modern automation equipment. In applications such as industrial robots, semiconductor equipment, and precision inspection systems, even a small movement error can affect production results.
The QDY-HS1 Harmonic Gear Reducers use advanced harmonic transmission technology to reduce transmission errors and improve positioning accuracy. This allows equipment to achieve smoother movement and better repeatability during continuous operation.
Backlash directly affects the accuracy of motion control systems. Excessive clearance may cause delayed response, unstable positioning, and reduced equipment performance.
The QDY-HS1 series adopts precision machining and optimized component matching to achieve low backlash performance. This feature makes it suitable for applications that require frequent movement, high repeatability, and precise positioning.
One major advantage of harmonic gear reducers is their ability to achieve high reduction ratios within a compact structure. This is especially important for modern equipment where available installation space is limited.
The QDY-HS1 Harmonic Gear Reducers provide efficient speed reduction and torque increase without requiring a large mechanical structure. This helps engineers design smaller and more flexible automation systems.
Industrial machines often operate under changing loads and repeated working cycles. A stable torque output is necessary to maintain equipment performance and reduce unexpected downtime.
Through multi-tooth engagement and optimized internal design, the QDY-HS1 Harmonic Gear Reducers provide reliable load transmission and improved operating stability.
For precision equipment, vibration and noise control are important factors. Excessive vibration may influence machine accuracy and shorten component service life.
The QDY-HS1 series uses precision manufacturing processes and careful assembly methods to achieve smoother operation, lower vibration, and reliable long-term performance.
Technical Feature | Design Method | Customer Benefit |
Low Backlash Structure | Precision component matching and optimized assembly | Improves positioning accuracy |
Harmonic Transmission Technology | Elastic deformation and multi-tooth engagement | Provides accurate motion control |
Compact Housing Design | High reduction ratio in small dimensions | Saves installation space |
Stable Torque Output | Balanced internal force distribution | Supports continuous operation |
Precision Manufacturing | Strict machining and inspection process | Improves service life and reliability |
Source: Technical advantages are based on harmonic transmission principles and Qiandeyi Transmission Technology product development experience.
The growth of intelligent manufacturing has increased the demand for high precision motion control components. Automation equipment manufacturers need transmission products that can provide accurate movement, stable operation, and long service life.
The QDY-HS1 Harmonic Gear Reducers are widely used in industries requiring precise movement control, including industrial robots, collaborative robots, CNC equipment, semiconductor systems, new energy equipment, and automated production lines.
Industrial robots perform repeated movements at high speed, which creates strict requirements for transmission components. Robot joints need reducers that can provide accurate positioning, stable torque output, and reliable operation.
The QDY-HS1 Harmonic Gear Reducers are suitable for robotic joints, welding robots, assembly robots, and handling robots. Their low backlash and high precision characteristics help robots maintain stable movement accuracy.
Collaborative robots require lightweight and compact components because they are designed for flexible interaction with people and other equipment.
The compact structure of QDY-HS1 Harmonic Gear Reducers allows easier integration into robotic joints while maintaining accurate motion control performance.
CNC machines require precise movement to maintain machining quality. The transmission system directly affects positioning accuracy, rotation stability, and processing results.
The QDY-HS1 series can be used in rotary tables, precision processing equipment, and automated machining systems that require stable and accurate transmission.
Semiconductor manufacturing requires extremely accurate positioning and stable movement because production processes are highly sensitive to mechanical errors.
The QDY-HS1 Harmonic Gear Reducers provide reliable motion control solutions for wafer handling equipment, precision inspection systems, and automated semiconductor production equipment.
The rapid growth of new energy industries has increased the demand for high precision automation systems. Battery manufacturing equipment, testing machines, and assembly systems require stable transmission components.
With accurate positioning and reliable torque transmission, the QDY-HS1 Harmonic Gear Reducers support new energy equipment in achieving stable production performance.
Modern production lines require equipment that can operate continuously with minimal interruption. Assembly machines, inspection systems, and material handling equipment depend on accurate motion control.
The QDY-HS1 Harmonic Gear Reducers help automated systems achieve smooth movement, accurate positioning, and stable operation during long working cycles.
Precision inspection equipment requires highly repeatable movement because measurement accuracy can be affected by even small mechanical errors.
The low backlash and stable transmission characteristics of QDY-HS1 Harmonic Gear Reducers make them suitable for inspection platforms, laboratory automation equipment, and precision testing systems.
Application Field | Typical Equipment | Main Requirements |
Industrial Robotics | Robot arms, welding robots, assembly robots | High positioning accuracy and stable torque output |
Collaborative Robots | Lightweight robotic joints and flexible robots | Compact structure and smooth movement |
CNC Equipment | Rotary tables and precision machining systems | Accurate rotation and reliable operation |
Semiconductor Equipment | Wafer handling and inspection machines | Low vibration and precise positioning |
New Energy Equipment | Battery manufacturing and testing systems | Stable continuous operation |
Source: Application information is based on Qiandeyi Transmission Technology product experience and industrial automation requirements.
The performance of a harmonic gear reducer depends on manufacturing accuracy, component quality, assembly technology, and inspection procedures. At Qiandeyi Transmission Technology, we control every production stage to ensure stable and reliable performance.
For precision transmission products, small differences in component processing may influence backlash, transmission efficiency, and service life. Therefore, we apply strict quality management from raw material inspection to final product delivery.
Reliable materials are the foundation of high-quality transmission products. Before production, raw materials are inspected to confirm mechanical properties and processing suitability.
Proper material selection helps improve component strength, wear resistance, and long-term operating stability of QDY-HS1 Harmonic Gear Reducers.
The wave generator, flex spline, and circular spline are the core components of the harmonic gear reducer. Their manufacturing accuracy directly influences transmission performance.
We focus on precision machining and process control to ensure accurate component matching and smooth operation during use.
During assembly, technicians carefully control internal clearance, component matching, lubrication condition, and installation accuracy.
Accurate assembly helps QDY-HS1 Harmonic Gear Reducers maintain low backlash, stable torque output, and reliable performance during long-term operation.
Before shipment, every QDY-HS1 Harmonic Gear Reducers completes professional inspection procedures to verify product performance and reliability.
Transmission accuracy testing
Backlash inspection
Torque performance testing
Operating noise testing
Vibration testing
Load capability testing
Reliability evaluation
Inspection Item | Purpose | Quality Benefit |
Transmission Accuracy Test | Verify motion control performance | Ensures precise operation |
Backlash Measurement | Check transmission clearance | Improves repeat positioning |
Torque Test | Verify output performance | Supports stable load operation |
Noise and Vibration Test | Evaluate running stability | Provides smoother operation |
Source: Quality inspection information is based on Qiandeyi Transmission Technology manufacturing procedures.
For global industrial customers, delivery reliability is as important as product performance. We provide complete service from technical communication and product selection to manufacturing, inspection, and shipment.
The standard production cycle of QDY-HS1 Harmonic Gear Reducers is generally 15–30 days. Customized products usually require 30–45 days depending on reduction ratio, rated torque, installation dimensions, backlash requirements, accuracy level, operating environment, and order quantity.
Service Category | Standard Information |
Standard Production Time | 15–30 days |
Customized Production Time | 30–45 days |
Quality Testing | Accuracy, backlash, torque, noise, vibration, load and reliability testing |
Payment Method | T/T bank transfer, L/C available for large projects |
Transportation | Express, air freight, sea freight, railway transportation |
Source: Production and delivery information is based on Qiandeyi Transmission Technology service process.
We provide flexible payment solutions according to different customer requirements. The standard payment method for QDY-HS1 Harmonic Gear Reducers is T/T bank transfer.
For large-volume orders, long-term cooperation projects, or customized automation equipment applications, L/C payment terms can be discussed according to customer needs.
During cooperation, we maintain clear communication regarding technical specifications, production progress, inspection results, and shipment arrangements to ensure smooth project delivery.
Different customers have different delivery requirements. Some projects require fast transportation, while others focus on cost efficiency for large orders. We select suitable logistics methods according to destination, order quantity, and delivery schedule.
International Express: Suitable for urgent orders and small quantity shipments requiring fast arrival.
Air Freight: Suitable for customers who need shorter transportation time and faster project progress.
Sea Freight: Suitable for large-volume orders requiring economical international transportation.
Railway Transportation: Suitable for selected international routes requiring stable delivery performance.
The QDY-HS1 Harmonic Gear Reducers contain precision mechanical components, so professional packaging is important to protect product accuracy and appearance during transportation.
Each product is packed with shockproof foam, moisture-proof sealed bags, and independent cartons. For bulk orders, export wooden cases or pallet fixing packaging are used to provide additional protection.
These packaging methods help prevent damage caused by vibration, impact, moisture, and handling during international transportation, ensuring safe delivery to customers worldwide.
Choosing a harmonic gear reducer supplier requires more than comparing product specifications. For automation equipment manufacturers, stable quality, engineering capability, production experience, and delivery reliability are important factors for long-term cooperation.
Qiandeyi Transmission Technology (Suzhou) Co., Ltd. was established in 2013 and is located in Huaqiao Town, Kunshan City, Jiangsu Province. We integrate research and development, manufacturing, sales, and service to provide complete intelligent drive solutions.
We specialize in precision transmission components including harmonic gear reducers, Planetary Gear Reducers, Hollow Rotary Platforms, RV gearboxes, Commutators, splitters, Joint modules, and Worm Gear Reducers.
Our products are widely used in industrial robots, CNC machine tools, automated production lines, logistics equipment, semiconductor systems, new energy equipment, and intelligent manufacturing industries.
Precision harmonic gear reducers require strong technical experience because manufacturing accuracy directly affects backlash, transmission efficiency, and service life.
Our core production team has more than 20 years of industry experience. We understand the requirements of automation equipment manufacturers and continuously improve product design and manufacturing processes.
From component processing and assembly adjustment to final inspection, every step is carefully controlled to ensure that QDY-HS1 Harmonic Gear Reducers provide stable and reliable performance.
Qiandeyi Transmission Technology has obtained ISO9001, ISO14001, and ISO45001 triple-system certification. These management systems support continuous improvement in product quality, production efficiency, and manufacturing safety.
We implement full-process quality control from raw material inspection, precision machining, component assembly, to final performance testing.
Every QDY-HS1 Harmonic Gear Reducers must pass professional inspection before shipment, including transmission accuracy, backlash, torque performance, vibration, noise, load capability, and reliability testing.
Different industries and equipment require different transmission solutions. A suitable harmonic gear reducer needs to match machine structure, operating conditions, and performance requirements.
Our engineering team provides customized support based on:
Reduction ratio requirements
Rated torque requirements
Installation dimensions
Backlash requirements
Positioning accuracy requirements
Operating environment
Continuous working conditions
Company Capability | Customer Benefit |
Precision transmission manufacturing capability | Reliable harmonic gear reducer performance |
Experienced technical team | Professional product selection and application support |
Complete quality inspection system | Stable product quality and consistent delivery |
Customization capability | Solutions for different automation applications |
Source: Company capability information is based on Qiandeyi Transmission Technology manufacturing experience and service system.
QDY-HS1 Harmonic Gear Reducers are precision transmission components designed for applications requiring high accuracy, low backlash, compact structure, and stable motion control.
The product uses a harmonic transmission structure consisting of a wave generator, flex spline, and circular spline to achieve precise speed reduction and torque transmission.
The main advantages include high precision transmission, low backlash, compact design, high reduction ratio, stable torque output, smooth operation, and long service life.
These characteristics make the QDY-HS1 series suitable for robotic joints, precision automation equipment, CNC systems, and intelligent manufacturing applications.
Selecting a suitable harmonic gear reducer depends on several factors, including reduction ratio, rated torque, input speed, output load, installation space, backlash requirements, positioning accuracy, and working environment.
For robotic applications, customers usually focus on low backlash, compact structure, and high positioning accuracy. For automated production equipment, stable operation, load capability, and long service life may become more important.
At Qiandeyi Transmission Technology, we analyze the actual working conditions of each project and provide suitable QDY-HS1 Harmonic Gear Reducers according to equipment requirements.
Yes. We provide customized harmonic gear reducer solutions according to different automation equipment requirements.
Customization can include reduction ratio, rated torque, installation dimensions, output structure, backlash level, precision requirements, lubrication conditions, and special operating environments.
Our engineering team works closely with customers to understand equipment conditions and provide transmission solutions that match actual applications.
The QDY-HS1 Harmonic Gear Reducers are widely used in industries requiring precise motion control and reliable transmission performance.
Industrial robots and robotic arms
Collaborative robots
CNC machine tools
Automated assembly equipment
Semiconductor manufacturing systems
New energy production equipment
Precision inspection machines
Intelligent manufacturing systems
The standard production cycle of QDY-HS1 Harmonic Gear Reducers is generally 15–30 days.
Customized products usually require 30–45 days depending on reduction ratio, rated torque, installation size, precision requirements, backlash specifications, operating environment, and order quantity.
Before delivery, we provide product inspection and shipment confirmation to help customers arrange their production schedules efficiently.
We apply complete quality control throughout the manufacturing process. From raw material selection and precision machining to assembly and final testing, each production step is carefully managed.
Before shipment, every QDY-HS1 Harmonic Gear Reducers is tested for transmission accuracy, backlash performance, torque output, operating noise, vibration, load capability, and reliability.
Our professional production equipment, precision testing instruments, and experienced technical team help ensure consistent product quality.
The standard payment method for QDY-HS1 Harmonic Gear Reducers is T/T bank transfer.
For large quantity orders or long-term cooperation projects, L/C payment terms can be discussed according to customer requirements.
Transportation methods include international express, air freight, sea freight, and railway transportation. We select suitable shipping methods according to destination, delivery requirements, and order quantity.
The QDY-HS1 Harmonic Gear Reducers provide a precision transmission solution for industrial automation, robotics, and intelligent manufacturing applications.
With advantages including high precision transmission, low backlash, compact structure, high reduction ratio, stable torque output, and smooth operation, the QDY-HS1 series helps improve equipment accuracy and production reliability.
For industries such as industrial robotics, collaborative robots, CNC equipment, semiconductor manufacturing, new energy production, and precision automation systems, selecting the correct harmonic gear reducer is important for achieving stable machine performance.
At Qiandeyi Transmission Technology, we combine professional manufacturing experience, advanced production processes, precision inspection equipment, and strict quality management to provide reliable transmission solutions for global customers.
Whether customers require standard QDY-HS1 Harmonic Gear Reducers or customized harmonic gearbox solutions, our team provides technical support, product selection guidance, and stable delivery service to support different automation projects.
Word Count: Approximately 3,500 words for the complete QDY-HS1 Harmonic Gear Reducers product page.
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