Zhejiang Laifual Drive Co., Ltd
Zhejiang Laifual Drive Co., Ltd
Contact Us
lsg harmonic reducer

LSG High Torque Harmonic Drives

Compared with the LSS series, LSG harmonic reduction gear has the same dimension as LSS harmonic speed reducers, but we improved the hardness of flex spline, using different heat treatment methods. We also added the contacting area of gear parts to reach 30% higher torque capacity, so the service life of the LSG series of micro harmonic drive can also increase by 43%.

Specification of LSG Series High Torque Harmonic Drive Gearbox


Rated parameter table of LSG series harmonic drive reducer

ModelReduction ratioRated torque at 2000r/min inputPermissible peak torque at start and stopPermissible maximum value for average load torquePermissible maximum momentary torquePermissible maximum input rotational speed(Grease)Permissible average input rotational speed
BacklashDesign life
NmkgfmNmkgfmNmkgfmNmkgfmr/minr/minArc SecHour

Drawing Download of LSG Series High Torque Harmonic Drive Gearbox

LSG Series


Description of LSG Harmonic Drive Reducer

High torque harmonic gearbox. Compared with LSS series, LSG series' torque capacity is 30% higher, and the service life is increased by 43%. We use the self-developed CMP heat treatment process to change the organizational form, refine organizational grains, strengthen the material properties, improve the tensile strength, yield strength and other indicators to change the mechanical properties of the material, so as to enhance the overall service life and improve the torque performance of the harmonic gearbox.

  • The flexspline is a cup-shaped structure, and assembled with high-rigidity cross roller bearings

  • LS tooth profile design. Self-developed CMP heat treatment process. 1um locus fine grinding

  • Compact and simple design. Non-backlash. Motor can be connected directly. It is easy for installation

  • Input and output coaxial

  • Excellent positioning accuracy and rotation accuracy

  • 1
    Can you supply products with large quantity?

    Yes, we can. Our annual production ability is more than 200,000pcs.

  • 2
    Do You Have Professional Technology Team?

    Yes, we have more than 70 employees on the technical team. We can offer a professional technical solutions for customers' projects.

  • 3
    What's the General Delivery Time?

    For standard product, the delivery time normally around 2-3 weeks. For customized products, normally aound 1-2 months.

  • 4
    Do You Produce The Harmonic Gearbox By Yourself?

    Yes, we are top harmonic gearbox manuafacturer in China, the total factory is 30,000 square meters with over 400 employees, Laifual's R&D center is recognized as a "High-tech enterprise R&D center in China".

  • 5
    What's The Biggest Advantage Of Your Products?

    Our product series is very complete, and the quality of the products is stable. The most important is the highest cost-effective in China.

  • 6
    What is your terms of payment ?

    For order amount which is less than 1000USD, 100% in advance; more than 1000USD, 30% T/T in advance, balance before shippment.

  • 7
    What is your product warranty?

    1 year warranty after delivery or working time of 2000 hours on condition that it is used in normal assembly state and lubrication condition recorded in product content.

  • 8
    How about after sales service?

    Our sales team are online 24 hours a day to help you solve any problems.

  • 9
    Can You Offer OEM & ODM Services?

    Yes, we can offer OEM and ODM services according to customers requirements.


We can ship to virtually any address in the world.

We will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on your chosen shipping provider, shipping date estimates may appear on the shipping quotes page. Please also note that the shipping rates for many items we sell are weight-based. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Products in Stock:

Shipping within 24 hours.

Customize Products:

Shipping within 3-5 weeks after both parties confirm the drawings.


Warranty period:

The warranty period is the earlier time between 1 year after delivery or working time of 2000 hours on condition that it is used in normal assembly state and lubrication condition recorded in product content.

Warranty Scope:

As a harmonic drive company, Laifual Drive is responsible for the maintenance or replacement of the product when malfunction resulting from a manufacturing defect under the warranty period. However, the following situations are out of warranty scope.

  • Damage results from the unsuitable operation or illegal use by clients.

  • Damage results from modification or repair that is not carried out by our company.

  • Damage not caused by the product.

  • Damage results from natural disasters and the like but not the responsibility of our company.

Contact Us
Need A One-stop Solution?
We believe in delivering excellent customer service and we are dedicated to satisfying our customers. If you want to know more about our products, prices, and customized services, please contact us with more details, we will respond as soon as possible.
Zhejiang Laifual Drive Co., Ltd
About Us
Contact Us
Leave a Message
Your Name*
Company Name
How Can We Help?*