Zhejiang Laifual Drive Co., Ltd
Zhejiang Laifual Drive Co., Ltd
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LHG High Torque Harmonic Gearbox

LHG Series: compared with the standard products, the LHG series of harmonic drive actuators have a 30% higher torque capacity. And the service life is increased by 43% and more reliable.

Applications of LHG Harmonic Drive Actuators:

  • Industrial robots;

  • Service robots;

  • Medical Devices;

  • Automation and special equipment;

  • Printed circuit manufacturing equipment.

Specification of LHG Series High Torque Harmonic Drives


Rated parameter table of LHG series harmonic gear 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 LHG Series High Torque Harmonic Drives

LHG Series


Description of LHG Harmonic Gear Reducer

High torque harmonic drive gearbox. Compared with standard products, LHG series' torque capacity is 30% higher. 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 capacity of the harmonic gearbox.

LHG-I/II High Precision Harmonic Gearbox

  • The wave generator adopts an integrated structure, which makes the whole product structure more compact.

  • Two connection ways:Circular spline is fixed while flexspline as an outputs. Or flexspline is fixed while circular spline as an outputs

  • Motor can be connected with the gearbox directly. It is easy for installation

LHG-III High Reliability Harmonic Drive Gearbox

  • There is a large-diameter hollow shaft hole in the middle of the wave generator cam

  • There are support bearings inside the harmonic gearbox. The harmonic reducer is designed with fully sealed structure. It is easy for installation.

LHG-IV High Torque Strain Wave Gear

  • The wave generator cam comes with input shaft, and it’s suitable for different input forms.

  • There are support bearings inside the strain wave gear. The harmonic gearbox is designed with fully sealed structure. It is easy for installation.

LHG-V Large Speed Ratio Harmonic Gearbox

  • Based on LHG-III series harmonic drive gearbox, users can redesign freely for lower weight and thinner thickness while properties have no change.

  • 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.

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