SF/SG-A Series Harmonic Drive (Strain Wave Gear Reducer)

SF/SG-A Series Harmonic Drive Reducer

The SF/SG-A series harmonic drive reducer is a type of precision gear system widely used in various industries and applications. It is a compact and efficient mechanism that offers high torque, high precision, and backlash-free operation. Harmonic drive is based on the principle of strain wave gearing, which utilizes a flexible spline, wave generator, and circular spline to transmit motion and torque. This unique gearing system enables high gear reduction ratios and exceptional positional accuracy.

The SF/SG-A series harmonic drive reducers are designed for a wide range of applications, including robotics, aerospace, medical devices, machine tools, and semiconductor manufacturing. They are used in systems that require precise and reliable motion control, where high torque density and compact size are essential.

SF/SG-A Series Harmonic Drive Reducer Features:

1. Increased design freedom
2. Reduced installation space by direct mounting inside the unit
3. Lightness and simplicity
4. High rigidity
5. No backlash
6. Coaxial input and output

SF/SG-A Series Harmonic Drive Reducer Structure:

SF/SG-A Series Harmonic Drive Reducer Naming Rules:

SF/SG-A Series Harmonic Drive Reducer Specifications:

SF/SG-A Series Harmonic Drive Reducer Starting Torque Table:

reduction ratio/models	14	17	20	25	32	40	45	50
030	4.8	7.2	12	18	50	—	—	—
050	3.7	5.7	7.3	14	28	50	70	94
080	2.8	3.8	4.8	8.9	19	33	47	63
100	2.4	3.3	4.3	7.9	18	29	41	56
120	—	3 .1	3 .9	7.3	15	27	37	51
160	-	-	3.4	6.4	14	24	33	44

SF/SG-A 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	0.050	0.0217	58 X 10^2	8 6 X 10^2	74	8.S X 10^4
17	0.060	0.0239	104 X 10^2	163 X 10^2	124	15.4 X 10^4
20	0.070	0.0255	146 X 10^2	220 X 10^2	187	25.2 X 10^4
25	0.085	0.0296	218 X 10^2	358 X 10^2	258	39.2 X 10^4
32	0.111	0.0364	382 X 10^2	654 X 10^2	580	100 X 10^4
40	0.133	0.044	433 X 10^2	816 X 10^2	849	179 X 10^4
45	0.154	0.0475	776 X 10^2	1350 X 10^2	1127	257X 10^4
50	0.170	0.0525	816 X 10^2	1490 X 10^2	1487	351X 10^4

SF/SG-A Series Harmonic Drive Reducer Dimensions:

SF/SG-A Series Harmonic Drive Reducer Size Chart:

SF/SG-A Series Harmonic Drive Reducer Advantages:

The SF/SG-A series harmonic drive reducer offers several advantages over other types of gearing systems. Here are some key advantages of this series:

1. High Torque Density: The SF/SG-A series harmonic drive provides a high torque output relative to its compact size and weight. This enables designers to achieve high torque requirements in applications with limited space constraints.

2. Zero Backlash: Backlash refers to the undesired clearance or play between gear teeth, which can cause positioning errors and reduce precision. Harmonic drives have virtually zero backlash, resulting in highly accurate and repeatable motion control. This is particularly important in applications that require precise positioning and control.

3. High Precision: The strain wave gearing mechanism of the SF/SG-A series strain wave gear reducer allows for exceptional precision in motion control. It offers low positional errors and high repeatability, ensuring accurate and reliable operation. This makes it suitable for applications such as robotics, semiconductor manufacturing, and precision machinery.

4. Compact and Lightweight: Harmonic drives are known for their compact design and lightweight construction. This makes them ideal for applications where space and weight are critical factors, such as in aerospace, medical devices, and portable equipment.

5. High Efficiency: The SF/SG-A series harmonic drive reducers are designed for high transmission efficiency, resulting in minimal energy loss during operation. This promotes energy savings and reduces heat generation, making them more efficient than traditional gearing systems.

6. Wide Range of Gear Ratios: Harmonic drives offer a wide range of gear ratios, allowing designers to select the most suitable ratio for their specific application requirements. This flexibility enables precise control over speed and torque, enhancing the versatility of the SF/SG-A series.

SF/SG-A Series Harmonic Drive Reducer Working Principle:

The SF/SG-A series harmonic drive reducer operates based on the principle of strain wave gearing. The main components of the harmonic drive reducer include a flex spline, a wave generator, and a circular spline. Let's explore the working principle of each component:

Flex Spline: The flex spline is a thin, flexible, and internally-toothed ring that wraps around the wave generator. It has fewer teeth than the wave generator and circular spline. The flex spline is connected to the output shaft of the reducer and is responsible for transmitting torque to the output.

Wave Generator: The wave generator is a rigid, elliptical-shaped disk with external teeth. It is connected to the input shaft of the reducer and is responsible for generating the wave motion. The wave generator fits inside the flex spline and interacts with it.

Circular Spline: The circular spline is a rigid, externally-toothed ring that surrounds the flex spline and wave generator. It has more teeth than the flex spline and engages with the wave generator. The circular spline is fixed or held stationary.

The working principle of the SF/SG-A harmonic drive reducer:

1. Input Motion: The input motion is applied to the wave generator through the input shaft. This can be rotational, oscillatory, or translational motion, depending on the application.

2. Wave Motion Generation: As the wave generator rotates, its elliptical shape causes the teeth on the wave generator to deform the flex spline. This deformation generates a wave-like motion along the flex spline.

3. Tooth Engagement: The wave motion of the flex spline causes the teeth on the flex spline to gradually engage and disengage with the teeth on the circular spline. This engagement creates a meshing action between the flex spline and the circular spline.

4. Gear Reduction: The meshing action between the flex spline and circular spline results in a gear reduction effect. The flex spline's reduced number of teeth compared to the circular spline creates a gear reduction ratio.

5. Torque Transmission: As the wave generator continues to rotate, the flex spline's teeth move along the circular spline, transmitting torque from the input shaft to the output shaft. The flex spline's deformation and the wave motion ensure continuous engagement and smooth torque transmission.

SF/SG-A Series Harmonic Drive Reducer Applications:

The SF/SG-A series harmonic drive reducer finds applications across various industries and fields where precise and reliable motion control is required. Some common applications of the SF/SG-A series include:

(1) Robotics: Harmonic drive reducers are extensively used in robotic systems for their compact size, high torque density, and precise motion control. They are employed in robot joints, robotic arms, and end-effectors, enabling precise and smooth movements in industrial, medical, and collaborative robots.

(2) Aerospace: The SF/SG-A series strain wave gear reducer is utilized in aerospace applications, including satellite mechanisms, space exploration robots, and aircraft control systems. Its lightweight and compact design, combined with high torque capabilities, make it suitable for weight-sensitive aerospace applications.

(3) Semiconductor Manufacturing: In the semiconductor industry, harmonic drive reducers are used in precision equipment such as wafer handling robots, lithography machines, and inspection systems. Their high precision and backlash-free operation ensure accurate positioning and alignment during the semiconductor manufacturing process.

(4) Medical Devices: Medical equipment often requires precise and compact motion control components. The SF/SG-A series harmonic drive reducers are employed in medical devices such as surgical robots, prosthetic limbs, medical imaging systems, and laboratory automation equipment, enabling precise and controlled movements.

(5) Automation and Assembly Systems: Harmonic drive reducers play a vital role in automated assembly systems where precise positioning, high torque, and compact size are required. They are used in pick-and-place robots, assembly line equipment, and material handling systems for efficient and accurate automation.

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.