Zhejiang Laifual Drive Co., Ltd
Zhejiang Laifual Drive Co., Ltd
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LHD Shorten Thin Harmonic Gearbox

LHD Shorten Thin Harmonic Gearbox

LHD series's flex spline is a flanging ultra-short tube structure. The connection can be fixing the circular spline, flex spline as output; or fixing flex spline, circular spline as output. Without changing products' performance, LHD-I's axial length shortens 50%, LHD-III shortens 15%.

Application of this kind of strain wave reducer:

  • Industrial robots;

  • Humanoid robots;

  • Semiconductor manufacturing equipment;

  • FPD manufacturing equipment;

  • Space equipment.

Specification of LHD Shorten Thin Harmonic Gearbox

Rated parametertable of LHD Harmonic Gearbox

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
NmNmNmNmr/minr/minArc SecHour

Features of LHD Shorten Thin Harmonic Gearbox

  • Super flat shape

  • Hollow structure

  • High positioning accuracy

  • Light weight

  • Two versions-hollow type(LHD-III) and simple unit type(LHD-I)

Drawing Download of LHD Shorten Thin Harmonic Gearbox

LHD Series


Description of LHD-I Series Harmonic Drive Reducer

The design of harmonic gearbox has reached the limit of flatness, with small size, and light weight. It is suitable for the occasions with strict thickness requirements for the harmonic reducer.

  • It is an ultra-thin hollow flange structure, and the output side is assembled with high-rigidity cross roller bearings.

  • Compact and simple design

  • High torque capacity

  • High Rigidity

  • Input and output coaxial

  • Excellent positioning accuracy and rotation accuracy

LHD-III Series Harmonic Drive Gearbox

  • It is an Ultra-thin shape with hollow flange structure

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

  • It is suitable for situation where the wire needs to be threaded from the center of harmonic gearbox, and with the strict thickness requirements for strain wave gear.

  • 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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