SD-U2 Series Harmonic Drive (Strain Wave Gear Reducer)

SD-U2 Series Harmonic Drive (Strain Wave Gear Reducer)

The SD-U2 series harmonic drive reducer is a type of precision gear mechanism widely used in various industries for high-precision motion control applications. The SD-U2 series is designed to provide high torque transmission with minimal backlash and high positional accuracy. It consists of three main components: a wave generator, a flex spline, and a circular spline. The wave generator is connected to the input side and generates a wave motion that drives the flex spline, which in turn drives the circular spline. This motion conversion mechanism allows for high gear reduction ratios in a compact design.

One of the key advantages of the SD-U2 series is its high torque transmission capability. It can handle significant torque loads while maintaining high precision and repeatability. This makes it suitable for applications that require accurate positioning and smooth operation, such as robotics, machine tools, aerospace systems, and medical devices.

The SD-U2 series also offers improved performance in terms of backlash and torsional stiffness. Backlash refers to the amount of play or clearance between the teeth of the gears. The SD-U2 series minimizes backlash, resulting in better control and accuracy in motion control systems. Torsional stiffness, on the other hand, refers to the ability of the system to resist twisting forces. The SD-U2 series provides enhanced torsional stiffness, allowing for better load transmission and stability. Additionally, the SD-U2 series is designed to be compact and lightweight, making it suitable for applications where space is limited or weight reduction is crucial. The compact design enables easy integration into existing systems without occupying excessive space.

SD-U2 Series Harmonic Drive Reducer Features:

1. Tight and simple design
2. Ultra-flat construction
3. High torque capacity
4. High rigidity
5. No backlash
6. Excellent positioning and rotational accuracy
7. Input and output coaxial

SD-U2 Series Harmonic Drive Reducer Structure:

SD-U2 Series Harmonic Drive Reducer Naming Rules:

SD-U2 Series Harmonic Drive Reducer Specifications:

SD-U2 Series Harmonic Drive Reducer Starting Torque Table:

reduction ratio/models	14	17	20	25	32
050	6.2	19	25	39	60
080	5.0	16	23	36	55
100	4.8	17	22	34	50
120	-	13	22	34	48
160	-	-	22	33	47

SD-U2 Series Harmonic Drive Reducer Crossed Bearing Performance:

Models	Roller pitch circle diameter	offset	Basic load rating		Allowable Moment Load Mc	Torque rigidity Km
	dp	R	Basic dynamic rated load cr	Basic static load rating	Nm	Nm/rad
	m	m	N	N
14	0.0503	0.0111	29	43	37	7.08
17	0.061	0.0115	52	81	62	12.7
20	0.070	0.011	73	110	93	21
25	0.086	0.0121	109	179	129	31
32	0.112	0.0173	191	327	290	82.1

SD-U2 Series Harmonic Drive Reducer Dimensions:

SD-U2 Series Harmonic Drive Reducer Size Chart:

SD-U2 Series Harmonic Drive Reducer Advantages:

The SD-U2 series harmonic drive reducer offers several advantages that make it a preferred choice in motion control applications. Here are some key advantages of the SD-U2 series:

1. High Precision: The SD-U2 series harmonic drive reducer provides exceptional positional accuracy and repeatability, allowing for precise motion control. It minimizes backlash, which is the clearance between gear teeth, resulting in highly accurate positioning and improved control.

2. High Torque Transmission: The SD-U2 series strain wave gearbox is designed to handle high torque loads. It can transmit a significant amount of torque while maintaining its compact size and high precision. This makes it suitable for applications that require powerful torque transmission, such as robotics and industrial machinery.

3. Compact and Lightweight: The SD-U2 series strain wave gear reducer has a compact and lightweight design, making it ideal for applications with limited space or weight restrictions. Its compact size allows for easy integration into existing systems without occupying excessive space. The lightweight nature reduces the overall weight of the system, making it suitable for mobile applications and systems where weight reduction is crucial.

4. High Torsional Stiffness: Torsional stiffness refers to the ability of the system to resist twisting forces. The SD-U2 series harmonic drive offers enhanced torsional stiffness, ensuring better load transmission and stability. This allows for precise and efficient motion control, even under high loads or dynamic conditions.

5. Wide Range of Ratios: The SD-U2 series harmonic drive reducer provides a wide range of gear reduction ratios, allowing for flexibility in application design. Different ratio options are available to match specific torque and speed requirements. This versatility makes it suitable for various applications, from low-speed/high-torque to high-speed/low-torque systems.

6. Smooth and Quiet Operation: The harmonic drive mechanism used in the SD-U2 series ensures smooth and quiet operation. It reduces vibration and noise, contributing to a more comfortable and efficient working environment.

SD-U2 Series Harmonic Drive Reducer Common Applications:

The SD-U2 series harmonic drive reducer finds applications in a wide range of industries and fields where precise motion control and high torque transmission are required. Some common applications of the SD-U2 series include:

• Robotics: The SD-U2 series harmonic drive reducer is extensively used in robotic systems for precise and smooth motion control. It is employed in various robot types, including industrial robots, collaborative robots (cobots), humanoid robots, and surgical robots. The high precision, compact size, and high torque transmission of the SD-U2 series make it ideal for robotic joint actuators and end-effectors.
• Machine Tools: In the field of machine tools, the SD-U2 series harmonic drive is used for precision positioning and control of axes such as rotary tables, indexing tables, and tool changers. Its high torque transmission capability ensures accurate and efficient machining operations, while the compact size allows for integration into CNC (Computer Numerical Control) machines.
• Aerospace and Defense Systems: The SD-U2 series strain wave gear reducer is employed in aerospace and defense applications, including satellite systems, antenna positioning systems, UAVs (Unmanned Aerial Vehicles), and missile guidance systems. The high precision and reliability of the SD-U2 series are crucial for achieving accurate positioning and stability in aerospace and defense systems.
• Semiconductor Manufacturing: Semiconductor manufacturing equipment requires high-precision motion control for processes such as wafer handling, lithography, and inspection. The SD-U2 series strain wave gearbox is used in these applications to provide precise positioning and smooth motion, ensuring the accuracy and quality of semiconductor production.
• Medical Devices: The SD-U2 series strain wave gear reducer is utilized in various medical devices, including surgical robots, imaging systems, and rehabilitation equipment. Its high precision and compact design make it suitable for applications that require precise and controlled movements, such as surgical procedures and imaging device positioning.
• Laboratory Automation: In laboratory automation, the SD-U2 series harmonic drive is used in equipment such as liquid handling robots, sample analyzers, and robotic arms for sample manipulation. Its high precision and repeatability ensure accurate handling of samples and precise positioning of robotic arms.

Why Choose  HZPT's Harmonic Drive Reducer?

HZPT Technology Co., Ltd. is a gearbox manufacturer with a core supply system, and has more than 8,000 cooperating customers. Since its establishment, HZPT has joined hands with partners in the industry to build factories all over the country, introduced advanced production equipment and precision monitoring equipment, and continuously innovated, researched and developed, and perfected its products. HZPT provides domestic and foreign customers with a comprehensive range of gearmotors and a diversified range of gearboxes to meet the different needs of customers in various fields.

Our main products include: planetary gearboxes, RV gearboxes, hollow rotary platforms, miniature gearboxes and matching speed controllers, miniature gearmotors, worm gearboxes, DC brushless gearmotors, three-phase asynchronous motors, vertical and horizontal gearmotors, torque reducers, cross steering gearboxes, harmonic reducers, and other series of gearmotors and their matching products. Many of them are of modularized design. Adopting new equipment and new technology, the products have better internal quality, smaller volume, lighter weight and more beautiful appearance. The products are widely used in: lithium equipment, laser equipment, engineering equipment, CNC machine tools, machinery production, non-standard automation, automobile manufacturing, aviation field, printing machinery, paper making, robotics, packaging machinery, filling, solar energy equipment, medical and pharmaceutical, testing instruments and many other industries.