LHD Shorten Thin Harmonic Gearbox
LHD Shorten Thin Harmonic Gearbox
LHD Shorten Thin Harmonic Gearbox
LHD Shorten Thin Harmonic Gearbox

LHD Shorten Thin Harmonic Gearbox

LHD series features a flex spline with a flanged ultra-short tube structure. The axial length is reduced by 50% in the LHD-I model and by 15% in the LHD-III model.

Key Features

  • Flanging ultra-short tube structure
  • Versatile output configuration
  • Axial length reduction
  • Product Description
  • Specifications
  • Application
  • FAQ
  • Download

Product Description

The LHD series features a flanged ultra-short barrel structure, offering flexibility in installation: it can be fixed at either end, rigid or flexible, for output connection.

The design of LHD-I has achieved the ultimate in flatness, boasting a compact and lightweight build, making it highly suitable for applications demanding strict thickness requirements for reducers. On the other hand, the LHD-III is tailored for applications requiring threading through the center of the reducer and stringent thickness specifications.


LHD-I (Unit Type):

Compact and Simple Design: Designed with a compact and simple layout for easy integration.

Small Size and Lightweight: Offers a small footprint and reduced weight for space-constrained applications.

High Torque Capacity: Capable of handling high torque loads efficiently.

High Rigidity: Ensures stability and precision in operation.

Coaxial Input and Output: Provides excellent positioning and rotation accuracy.

LHD-III (Hollow Type):

Ultra-Thin Shape with Hollow Flange Structure: Features an ultra-thin design with a hollow flange structure, ideal for applications requiring wire threading through the center of the gearbox.

Suitable for Strict Thickness Requirements: Designed to meet strict thickness requirements for harmonic drive applications.


Specification of LHD Rated parameters

Model Reduction ratio Rated torque at 2000r/min input Permissible peak torque at start and stop Permissible maximum value for average load torque Permissible maximum momentary torque Permissible maximum input rotational speed Permissible average input rotational speed Backlash Weight Design life
Grease Grease
Nm Nm Nm Nm r/min r/min Arc Sec Kg Hour
14 50 3.7 12 4.8 23 8500 3500 ≤20 LHD-I:0.34 9000
80 5.4 16 7.7 35 LHD-III:0.64 10000
100 5.4 19 7.7 35   10000
17 50 11 23 18 48 7300 3500 ≤20 LHD-I:0.42 9000
80 15 29 19 61 LHD-III:0.87 10000
100 16 37 27 71   10000
20 50 17 39 24 69 6500 3500 ≤20 LHD-I:0.54 9000
80 24 51 33 89 LHD-III:1.14 10000
100 28 57 34 95   10000
25 50 27 69 38 127 5600 3500 ≤20 LHD-I:0.95 9000
80 44 96 60 179 LHD-III:1.75 10000
100 47 110 75 184   10000
32 50 53 151 75 268 4000 3000 ≤20 LHD-I:1.90 9000
80 83 213 117 398 LHD-III:3.56 10000
100 96 233 151 420   10000
  • What is a harmonic drive box?


    A harmonic drive box is a type of gear system that produces high reduction ratios in a compact size. It uses the mechanics of a flexible element deforming to transmit motion and achieve high precision and torque.

  • How does a harmonic gear box work?


    A harmonic gear box works by using a circular spline, flexspline, and a wave generator. The wave generator deforms the flexspline into an elliptical shape, which then engages with the teeth of the circular spline at two points, providing a high reduction ratio through the difference in tooth count between the engaged elements.

  • What are the main components of a strain wave drive?


    The main components are the circular spline (fixed outer ring), the flexspline (flexible inner ring with fewer teeth), and the wave generator (an elliptical disc that fits inside the flexspline).

  • What are the advantages of using harmonic/harmonic drive boxes?


    Strain wave/harmonic gearboxes offer high precision, zero backlashes, high torque capacity, compact size, and lightweight. They are also known for their excellent positional accuracy and repeatability.

  • What applications are harmonic-type drives used in?


    They are used in applications requiring high precision and reliability, such as robotics, aerospace, defense, medical equipment, and semiconductor manufacturing equipment.

  • How do you select a strain wave drive for a specific application?


    Selection depends on factors like torque requirements, desired reduction ratio, space constraints, load capacity, and environmental conditions. It's essential to consult with manufacturers or experts to choose the appropriate model.

  • What are the different types of Harmonic Driveboxes?


    Circular Spline Gearboxes

    Cup-Type Gearboxes

    Flat Gearboxes

  • What is a Circular Spline?


    The Circular Spline in Strain Wave Gearboxes are characterized by their robust design.


  • LHD Series
  • LHD-I Series
  • LHD-III Series
  • LHD-3D Series


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