Introduction to QDY-CD UH Harmonic Reducer
The QDY-CD UH series flexure features a cup-shaped short cylindrical structure. The input shaft directly mates with the inner bore of the wave generator via screws. It is generally used with the rigid wheel end fixed and the flexure end outputting.
QDY-CD UH 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 | 3.6 | 11.5 | 4.7 | 23 | 8000 | 3500 | ≤30 | >10000 |
80 | 5.2 | 15 | 6.2 | 30 | ≤30 | >10000 | |||
100 | 5.4 | 18 | 7.7 | 35 | ≤30 | >10000 | |||
17 | 50 | 11 | 23 | 18 | 48 | 7000 | 3500 | ≤30 | >10000 |
80 | 14 | 29 | 21 | 54 | ≤30 | >10000 | |||
100 | 16 | 37 | 27 | 70 | ≤30 | >10000 | |||
20 | 50 | 17 | 38 | 24 | 68 | 6000 | 3500 | ≤30 | >10000 |
80 | 23 | 50 | 29 | 79 | ≤30 | >10000 | |||
100 | 28 | 57 | 34 | 95 | ≤30 | >10000 | |||
25 | 50 | 26 | 66 | 36 | 121 | 5500 | 3500 | ≤30 | >10000 |
80 | 42 | 91 | 62 | 157 | ≤30 | >10000 | |||
100 | 47 | 108 | 72 | 175 | ≤30 | >10000 | |||
120 | 47 | 111 | 72 | 187 | ≤30 | >10000 | |||
32 | 50 | 50 | 145 | 70 | 256 | 4500 | 3500 | ≤30 | >10000 |
80 | 80 | 203 | 126 | 350 | ≤30 | >10000 | |||
100 | 91 | 220 | 145 | 400 | ≤30 | >10000 | |||
120 | 92 | 235 | 145 | 425 | ≤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 and automated equipment. Since our establishment in 2013, we have been committed to providing reliable drive solutions for global customers in industrial robotics, CNC equipment, automated production lines, logistics systems, new energy equipment, and other advanced manufacturing industries.
Our QDY-CDUH Harmonic Gear Reducers are developed for applications that require high precision transmission, high reduction ratio, low backlash, compact structure, and stable operation. By combining harmonic drive technology with professional manufacturing processes, we provide precision motion control components that help automation equipment achieve accurate movement and reliable performance.
As intelligent manufacturing continues to grow, industrial equipment requires faster response, higher positioning accuracy, and longer operating life. The transmission system plays an important role in overall machine performance. A high-quality harmonic gear reducer helps reduce motion errors, improve production consistency, and maintain stable operation during continuous working conditions.
The QDY-CDUH Harmonic Gear Reducers use an advanced harmonic transmission structure consisting of a wave generator, flex spline, and circular spline. Through controlled elastic deformation and precise tooth engagement, the reducer achieves high reduction performance within a compact design while maintaining excellent positioning accuracy and smooth torque transmission.
We provide standard and customized QDY-CDUH Harmonic Gear Reducers according to different customer requirements. Our engineering team evaluates reduction ratio, rated torque, installation dimensions, backlash requirements, working environment, and accuracy standards to provide suitable transmission solutions for different industrial applications.
The QDY-CDUH Harmonic Gear Reducers are precision transmission products designed for modern automation systems. They are widely used in equipment that requires accurate positioning, smooth movement, compact installation, and long-term reliable operation.
Unlike traditional gear reducers that mainly depend on rigid gear transmission, harmonic gear reducers use flexible deformation technology. This unique structure allows multiple teeth to engage simultaneously, improving transmission accuracy and reducing mechanical clearance.
The QDY-CDUH series is designed to meet the needs of industries where precision and reliability are important. Typical applications include robot joints, collaborative robots, CNC machines, semiconductor equipment, automated assembly systems, and intelligent manufacturing platforms.
The main components of QDY-CDUH Harmonic Gear Reducers include:
Wave Generator: The input component that creates controlled deformation movement and transfers power into the transmission system.
Flex Spline: A flexible gear component that changes shape during operation and provides accurate transmission.
Circular Spline: A rigid gear component that works together with the flex spline to achieve speed reduction.
Through the cooperation of these three components, QDY-CDUH Harmonic Gear Reducers provide high precision transmission, low backlash performance, stable torque output, and excellent repeatability.
For robotic systems and precision automation equipment, movement accuracy directly affects production quality. A reliable harmonic gear reducer allows machines to perform repeated operations with better stability and consistency.
High Precision Transmission: The harmonic drive structure provides accurate movement control and supports precision positioning applications.
High Reduction Ratio: The compact transmission structure allows significant speed reduction within limited installation space.
Low Backlash: Precision design reduces transmission clearance and improves repeated positioning accuracy.
High Torque Density: Multiple tooth engagement improves load distribution and provides stable output performance.
Compact Structure: Small size and lightweight design make the product suitable for robotic joints and precision equipment.
Long Service Life: Strict manufacturing control and professional testing ensure reliable operation under continuous industrial conditions.
Feature | QDY-CDUH Harmonic Gear Reducers | Application Benefit |
Transmission Structure | Wave generator, flex spline, and circular spline harmonic drive system | Provides accurate motion transmission |
Precision Performance | Low backlash and high repeat positioning accuracy | Improves automation equipment control |
Design Structure | Compact and lightweight transmission design | Saves installation space |
Torque Transmission | Multi-tooth engagement mechanism | Provides stable output under load conditions |
Main Applications | Robotics, CNC equipment, automation systems, semiconductor equipment | Supports intelligent manufacturing |
Source: Technical characteristics are based on harmonic transmission principles and Qiandeyi Transmission Technology product development experience.
The working principle of QDY-CDUH Harmonic Gear Reducers is based on harmonic transmission technology. Instead of using only rigid gear rotation, the system uses controlled elastic deformation to achieve accurate speed reduction and power transmission.
When the motor drives the wave generator, the wave generator changes the shape of the flex spline. This creates continuous engagement between the flex spline and circular spline, producing the required reduction effect.
Because the flex spline and circular spline have different numbers of teeth, the reducer can achieve a high reduction ratio while maintaining a compact size.
This transmission method provides advantages such as high accuracy, low backlash, smooth operation, and stable torque output, making QDY-CDUH Harmonic Gear Reducers suitable for precision motion control applications.
The special structure of QDY-CDUH Harmonic Gear Reducers allows multiple teeth to engage at the same time during operation. This design improves load distribution and helps the reducer maintain stable transmission performance under different working conditions.
Compared with conventional gear transmission systems, harmonic transmission provides higher precision within a smaller structure. This advantage is especially important for robotic joints, precision positioning systems, and compact automation equipment.
The accurate matching between the wave generator, flex spline, and circular spline reduces transmission errors and improves the overall response performance of the motion control system.
Core Component | Main Function | Performance Contribution |
Wave Generator | Creates flex spline deformation and transfers input motion | Provides accurate transmission control |
Flex Spline | Transfers movement through elastic deformation | Improves positioning accuracy |
Circular Spline | Provides rigid tooth engagement support | Enhances load stability |
Source: Structural information is based on harmonic gear transmission design principles.
At Qiandeyi Transmission Technology, we understand that a harmonic gear reducer is not simply a speed reduction component. It is a key part that directly influences the accuracy, efficiency, and reliability of an entire automation system.
For this reason, we focus on every manufacturing detail, from component processing and assembly accuracy to final performance inspection. The QDY-CDUH Harmonic Gear Reducers are designed to provide stable motion control solutions for demanding industrial applications.
In modern automation systems, machines often need to complete repeated movements with very small positioning errors. This is especially important in robotics, semiconductor equipment, and precision manufacturing systems.
The QDY-CDUH Harmonic Gear Reducers use precision harmonic transmission technology to achieve accurate motion conversion. This helps equipment maintain stable positioning performance during continuous operation.
Backlash is one of the most important factors affecting precision transmission systems. Excessive mechanical clearance may lead to positioning deviation and reduced response speed.
Through optimized structural design and precision manufacturing, QDY-CDUH Harmonic Gear Reducers achieve low backlash performance, making them suitable for applications requiring repeated high accuracy movement.
Many modern machines require smaller components while maintaining strong performance. A compact reducer allows engineers to design lighter and more efficient automation systems.
The QDY-CDUH Harmonic Gear Reducers provide high reduction capability within a compact housing, helping reduce installation space while maintaining reliable transmission performance.
High torque density means the reducer can provide strong output capability without increasing overall equipment size. This is especially valuable in robotic applications where weight and space are limited.
The multi-tooth engagement structure of QDY-CDUH Harmonic Gear Reducers improves force distribution and provides stable torque transmission under different load conditions.
Industrial equipment often works for many hours every day. Transmission components must maintain stable performance under repeated acceleration, deceleration, and changing loads.
The QDY-CDUH Harmonic Gear Reducers are manufactured with strict process control and tested for accuracy, backlash, vibration, noise, torque performance, and reliability before delivery.
Performance Item | QDY-CDUH Harmonic Gear Reducers Feature | Industrial Benefit |
Transmission Accuracy | Precision Harmonic Drive structure | Improves positioning performance |
Backlash Control | Low clearance transmission design | Supports repeated precise movement |
Torque Output | Multiple tooth engagement system | Maintains stable load performance |
Running Stability | Precision manufacturing and inspection process | Reduces vibration and improves reliability |
Installation Flexibility | Compact and lightweight structure | Supports flexible equipment design |
Source: Performance comparison is based on harmonic reducer design characteristics and industrial automation application requirements.
With the development of intelligent manufacturing, more industries require precise and reliable motion control solutions. The transmission system has become an important factor affecting equipment efficiency and product quality.
The QDY-CDUH Harmonic Gear Reducers are widely used in industries that require high precision, compact design, and stable operation, including industrial robots, collaborative robots, CNC equipment, semiconductor systems, new energy equipment, and automated production lines.
Industrial robots perform complex tasks such as welding, assembly, handling, and precision processing. Each robot joint requires accurate movement control and stable torque transmission.
The QDY-CDUH Harmonic Gear Reducers provide reliable joint transmission solutions with low backlash and high positioning accuracy, helping robots achieve smoother and more repeatable movement.
Collaborative robots require compact and lightweight transmission components because they need flexible movement and precise control while working together with operators.
The compact structure and stable motion performance of QDY-CDUH Harmonic Gear Reducers make them suitable for robotic joints and intelligent automation systems.
CNC machine tools require extremely accurate positioning and stable movement control to maintain machining quality. The transmission system directly affects processing accuracy, surface quality, and equipment reliability.
The QDY-CDUH Harmonic Gear Reducers can be applied in rotary tables, precision positioning platforms, and automated machining systems. Their low backlash performance helps improve rotation accuracy and maintain stable operation during continuous machining processes.
Semiconductor production requires extremely precise movement because even small positioning errors may influence manufacturing results. Equipment used for wafer handling, inspection, and assembly requires reliable transmission components with excellent repeatability.
The QDY-CDUH Harmonic Gear Reducers provide smooth motion control and accurate positioning for semiconductor automation systems, supporting precision manufacturing environments.
The rapid development of new energy industries has increased demand for automated production equipment. Battery manufacturing lines, testing systems, and assembly equipment require transmission components that can operate accurately for long periods.
With high precision transmission, compact structure, and reliable output performance, QDY-CDUH Harmonic Gear Reducers support stable operation in new energy production systems.
Modern factories use automated systems to improve production efficiency and maintain consistent product quality. These systems often require repeated movement, precise positioning, and continuous operation.
The QDY-CDUH Harmonic Gear Reducers are suitable for automated assembly machines, inspection equipment, material handling systems, and intelligent manufacturing platforms that require accurate motion control.
Application Industry | Typical Equipment | QDY-CDUH Application Advantage |
Industrial Robotics | Robot arms, welding robots, assembly robots | Provides accurate joint movement and stable torque transmission |
Collaborative Robots | Lightweight robotic joints | Supports flexible and precise motion control |
CNC Equipment | Rotary tables and machining systems | Improves positioning accuracy and processing stability |
Semiconductor Equipment | Wafer handling and inspection systems | Provides smooth and repeatable movement |
New Energy Equipment | Battery production and testing machines | Supports continuous automated operation |
Source: Application information is based on Qiandeyi Transmission Technology product experience and industrial automation requirements.
The performance of a precision harmonic gear reducer depends on manufacturing accuracy, component quality, assembly technology, and inspection procedures. At Qiandeyi Transmission Technology, we control every important production step to ensure stable product performance.
For precision transmission products, small differences in machining accuracy or assembly adjustment can influence backlash, transmission efficiency, noise level, and service life. Therefore, we pay close attention to every manufacturing detail.
Reliable raw materials provide the foundation for high-quality transmission components. Before production begins, materials are inspected to confirm their mechanical properties and suitability for precision machining.
Proper material selection improves component strength, wear resistance, and operating stability, helping QDY-CDUH Harmonic Gear Reducers maintain reliable performance during long-term operation.
The wave generator, flex spline, and circular spline are the core components of QDY-CDUH Harmonic Gear Reducers. Their machining accuracy directly affects transmission performance.
We use professional production equipment and controlled manufacturing processes to maintain accurate dimensions, consistent quality, and reliable component matching.
During assembly, our technicians carefully control component matching, internal clearance, lubrication conditions, and installation accuracy.
Accurate assembly adjustment helps QDY-CDUH Harmonic Gear Reducers achieve smooth transmission, low backlash performance, and stable torque output.
Before delivery, every QDY-CDUH Harmonic Gear Reducers completes professional inspection to verify performance and reliability under expected working conditions.
Transmission accuracy testing
Backlash measurement
Torque performance inspection
Operating noise testing
Vibration evaluation
Load capability verification
Reliability testing
Inspection Item | Testing Purpose | Quality Benefit |
Transmission Accuracy | Verify motion precision | Ensures accurate equipment movement |
Backlash Test | Measure mechanical clearance | Improves positioning repeatability |
Torque Test | Check output capability | 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 and testing procedures.
For industrial automation customers, product quality is only one part of a successful project. Reliable delivery, clear communication, and professional service are also important factors when selecting a precision transmission supplier.
At Qiandeyi Transmission Technology, we provide complete support throughout the whole process, including technical communication, product selection, manufacturing, quality inspection, and shipment preparation.
The standard production cycle of QDY-CDUH 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, precision level, operating conditions, and order quantity.
Before production, our engineering team confirms customer requirements to ensure the selected harmonic gear reducer matches the actual equipment. Important factors include motor specifications, load conditions, operating frequency, installation method, and accuracy requirements.
During manufacturing, every important process is controlled carefully, including precision machining, component inspection, assembly adjustment, and final performance testing. This helps ensure every QDY-CDUH Harmonic Gear Reducers can operate reliably after delivery.
Service Process | Standard Information | Customer Benefit |
Technical Communication | Application evaluation and specification confirmation | Helps select suitable transmission solutions |
Standard Production | 15–30 days | Meets normal project delivery schedules |
Customized Production | 30–45 days | Supports special equipment requirements |
Final Inspection | Accuracy, backlash, torque, vibration, noise, and reliability testing | Ensures stable product performance |
Source: Production and service information is based on Qiandeyi Transmission Technology manufacturing standards.
We provide flexible payment solutions according to different customer project requirements. The standard payment method for QDY-CDUH Harmonic Gear Reducers is T/T bank transfer.
For large-volume orders, long-term cooperation projects, and customized automation programs, L/C payment terms can be discussed according to customer requirements.
Clear communication about technical specifications, production progress, inspection results, and delivery arrangements helps both sides complete projects more efficiently.
Different customers have different delivery requirements. Some projects require fast transportation, while others focus on transportation cost control for larger quantities.
We provide different transportation options according to destination, order quantity, and project schedule.
International Express: Suitable for samples, small orders, and urgent delivery requirements.
Air Freight: Suitable for customers requiring shorter transportation time and faster project progress.
Sea Freight: Suitable for large quantity orders requiring economical transportation.
Railway Transportation: Suitable for specific international routes requiring stable transportation.
QDY-CDUH Harmonic Gear Reducers contain precision mechanical structures, so proper packaging is necessary to protect product quality during international transportation.
Each product is protected with shockproof foam, moisture-proof sealed bags, and independent cartons. These methods help reduce the risk of damage caused by vibration, impact, dust, and moisture.
For bulk orders, we use export wooden cases or pallet fixing packaging to provide stronger protection during long-distance transportation.
Selecting a harmonic gear reducer supplier is not only about comparing product specifications. For automation equipment manufacturers, stable quality, technical capability, manufacturing experience, and reliable delivery are important for long-term cooperation.
Qiandeyi Transmission Technology (Suzhou) Co., Ltd. was established on July 31, 2013, and is located in Huaqiao Town, Kunshan City, Jiangsu Province, China.
We are a national high-tech enterprise integrating research and development, manufacturing, sales, and service. We specialize in the design and manufacturing of core components for intelligent and automated equipment.
Our company provides one-stop intelligent drive solutions, including ATG Precision Planetary Gearboxes, harmonic gearboxes, Hollow Rotary Platforms, RV gearboxes, Commutators, splitters, Joint modules, and Worm Gear Reducers.
These products are widely used in industrial robots, CNC machine tools, automated production lines, logistics equipment, new energy manufacturing systems, and intelligent manufacturing fields. Our products have been supplied to customers in more than 30 countries.
Precision transmission components require professional manufacturing experience because small details can influence final performance.
Our core production team has more than 20 years of industry experience. We understand the importance of machining accuracy, component matching, assembly control, and performance testing.
Through continuous improvement of production technology, we provide reliable QDY-CDUH Harmonic Gear Reducers for different automation applications.
Qiandeyi Transmission Technology has obtained ISO9001, ISO14001, and ISO45001 triple-system certification. These management systems support continuous improvement in product quality, environmental management, and production safety.
From raw material inspection to finished product shipment, we implement full-process quality control. Every QDY-CDUH Harmonic Gear Reducers must pass professional testing before delivery.
Different industries have different requirements for precision transmission systems. A robot joint may require extremely low backlash and fast response, while an automated production machine may focus more on stable torque output and long service operation.
At Qiandeyi Transmission Technology, we provide customized QDY-CDUH Harmonic Gear Reducers based on actual customer applications. Our engineering team communicates with customers to understand equipment conditions and select suitable technical solutions.
Our customization services include:
Reduction ratio selection
Rated torque optimization
Installation dimension adjustment
Output structure customization
Backlash requirement control
Precision level adjustment
Special environment adaptation
By combining engineering experience with manufacturing capability, we help customers develop reliable transmission solutions for industrial robots, automation equipment, CNC systems, and precision machinery.
Capability | Customer Value |
Precision transmission component manufacturing | Provides reliable motion control performance |
Experienced engineering team | Offers professional application support |
Advanced production equipment | Ensures stable product consistency |
Complete testing process | Improves product reliability |
Customized development ability | Supports different industrial requirements |
Source: Company capability information is based on Qiandeyi Transmission Technology manufacturing experience and service system.
QDY-CDUH Harmonic Gear Reducers are precision transmission components designed for intelligent automation equipment requiring high accuracy, low backlash, compact structure, and stable motion control.
The product uses harmonic drive technology with a wave generator, flex spline, and circular spline. Through controlled elastic deformation, it achieves high reduction ratio and precise power transmission.
The compact structure and accurate transmission characteristics make QDY-CDUH Harmonic Gear Reducers suitable for robotic joints, precision equipment, and automated systems.
The main advantages of QDY-CDUH Harmonic Gear Reducers include:
High precision transmission
Low backlash performance
High reduction ratio
High torque density
Compact structure
Smooth operation
Long service life
These advantages allow the product to meet the requirements of modern automation equipment and precision motion control applications.
The selection of a harmonic gear reducer depends on several important factors, including reduction ratio, output torque, motor specification, installation space, accuracy requirement, operating speed, and working environment.
For robotic applications, customers usually focus on compact size, low backlash, and high positioning accuracy. For industrial automation systems, stable operation and load capability are also important.
Our technical team provides product recommendations according to the customer's actual equipment requirements.
Yes. We provide customized harmonic gear reducer solutions according to different application requirements.
Customization can include reduction ratio, torque capacity, mounting structure, output design, backlash level, accuracy requirements, and special working conditions.
Our goal is to provide transmission products that match the real needs of customer equipment.
QDY-CDUH Harmonic Gear Reducers are widely used in industries requiring precise movement and reliable transmission performance, including:
Industrial robots
Collaborative robots
Robot arms
CNC machine tools
Semiconductor manufacturing equipment
New energy production equipment
Automated assembly lines
Precision inspection systems
Intelligent manufacturing systems
The standard production cycle of QDY-CDUH Harmonic Gear Reducers is generally 15–30 days.
Customized products usually require 30–45 days depending on reduction ratio, rated torque, installation dimensions, precision requirements, backlash specifications, application environment, and order quantity.
We implement complete quality control throughout the manufacturing process. From raw material inspection and precision machining to assembly and final testing, every production stage is carefully controlled.
Before shipment, each QDY-CDUH Harmonic Gear Reducers is tested for transmission accuracy, backlash, torque performance, vibration, noise, load capability, and reliability.
The standard payment method is T/T bank transfer. For large-volume projects and long-term cooperation orders, L/C payment terms can be discussed according to customer requirements.
Transportation methods include international express, air freight, sea freight, and railway transportation.
Products are packed with shockproof foam, moisture-proof sealed bags, independent cartons, and export wooden cases or pallet packaging for bulk orders to ensure safe delivery.
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