Laifual Drive prides itself on delivering innovative solutions for our customers in varying industry sectors, applications, and locations all over the world. Our gearbox products are aimed at providing optimal performance solutions for industry partners.

Harmonic Gearbox

LSS/LSG/LSN Standard Type/High Torque/Light Weight Harmonic Gearbox

Laifual Drive adopts our newest developed 'LS' tooth profile, which improves harmonic reducer's comprehensive performance a lot.

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LSD Shorten Thin Harmonic Gearbox

LSD series is a newly developed strain wave gear/drive based on the LSS series to fulfil the needs of the current market.

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LFS Ultra Flat Harmonic Gearbox

LFS series-this harmonic actuator is a combination product that is lightweight and ultra-flat. It uses cross-roller bearing.

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LHT/LHN/LHG Large Diameter Hollow Hole, Flat Shape Harmonic Gearbox

LHT Series use hat type flexspline. We can divide LHT series into 5 versions, LHT-I, LHT-II,LHT-III,LHT-IV and LHT-V.

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LHD Shorten Thin Harmonic Gearbox

LHD series's flex spline is a flanging ultra-short tube structure.

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Planetary Gearbox

LFB Concentric Shaft Planetary Gearbox

Powerful tool in precision positioning with a backlash of less than 0°03'.

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LFF Flange Output Planetary Gearbox

Output flange and tapered roller bearings for high load capacity.

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LFD Planetary Gearbox

VRS Series; Tapered roller bearings for high load capacity.

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LFE Planetary Gearbox Reducer

VRL Series; Powerful tool in precision positioning with a backlash of less than 0°05'.

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LFBR Right-angle Series Planetary Gearbox

A high-performance right-angle solution for servo applications that keeps LFBR's design and characteristics.

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LFFR Right-angle Series Planetary Gearbox

A high-performance right-angle solution for servo applications that keeps LFFR's design and characteristics.

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LFER Right-angle Series Planetary Gearbox

A high-performance right-angle solution for servo applications that keeps LFER's design and characteristics.

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LFA Planetary Gearbox

Powerful tool in precision positioning with a backlash of less than 0°03' Reduction Ratio: 1/3-1/100 Backlash: 0.05° (within 3 min)

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LFAR Right-angle Series Planetary Gearbox

A high-performance right-angle solution for servo applications that keeps LFAR's design and characteristics.

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Robot Joint Actuator LFRob

I series Robot joint actuator LFRob

Absolute encoder on the motor side8 core componentsRobot joint model: LFRob70H80I-BS-18EModel NoLFRob70LFRob80LFRob90LFRob110LFRob142LFRob170Ratio14-5014-8014-10017-5017-8017-10020-5020-8020-10025-50...

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T series Robot joint actuator LFRob

8 core componentsRobot joint model: LFRob70H80I-BS-18EModel NoLFRob70LFRob80LFRob90LFRob110LFRob142Ratio14-5014-8014-10017-5017-8017-10020-5020-8020-10025-5025-8025-10025-12032-5032-8032-10032-120Star...

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How does a Harmonic Drive Work?

The rotation movement comes from the input shaft, which can be a servo motor shaft. This is connected to an element called "harmonic wave generator", which has an elliptical shape and is surrounded by an elliptical ball bearing. When the axis rotates, the edge changes position, so it looks like a motion wave is being generated. The part is inserted into a flexible spline made of torsionally rigid but flexible material. The material absorbs this fluctuation by bending and forming an ellipse according to the rotation of the input shaft. The outer edge of this flexible spline has gear teeth suitable for transmitting high loads without any problems. In order to transmit these loads, the flexspline is installed in a circular spline, which is a circular gear with internal teeth. The outer ring is rigid, and its inner diameter is slightly larger than the main axis of the ellipse formed by the flexspline. This means that the circular spline does not assume the elliptical shape of the other two components, but simply meshes its inner teeth with the teeth on the outer flexspline, causing the flexspline to rotate.

The speed depends on the speed of the input shaft and the difference in the number of teeth between the flexspline and the circular spline. The number of teeth of the flexspline is less than that of the circular spline, so it can rotate in the opposite direction at a smaller rate than the input shaft. The reduction ratio is: (the number of flexspline teeth-the number of circular spline teeth)/the number of flexspline teeth. The difference in the number of teeth can be changed to adapt to different reduction ratios, thereby adapting to different professional needs and requirements of the harmonic gearhead. Contact us for more harmonic drive details.

Harmonic Drive VS Planetary Gear

Planetary reducer is also known as planetary gear reducer. The gear structure is composed of sun gear, planetary gear, outer ring gear, planet carrier and drive shaft, and it adopts rigid gears; planetary gear structure reducer is usually composed of multi-stage planetary gears. The deceleration is achieved by a large gear on the output shaft of the gear with a small number of teeth meshes. The reducer is a rigid drive device used for low speed and high torque.

The drive structure of the harmonic reducer is composed of three basic components: a fixed inner toothed rigid wheel, a flexible wheel,  and a wave generator that radially deforms the flex wheel. The harmonic reducer is composed of a fixed inner tooth rigid wheel, a flexible wheel and a wave generator that makes the flexible wheel radially deform. It has the characteristics of high precision and good bearing capacity, compared with ordinary reducers.

The planetary reducer and harmonic reducer are mainly different in structure. The planetary reducer has rigidity, and the structure of the harmonic reducer adopts rigid and flexible gear meshing drive. Compared with planetary gearbox, harmonic drive has the advantages of higher precision, larger transmission ratio, small size, light weight, high transmission efficiency, no impact, and low noise.

Strain Wave Gear Applications

Laifual Drive designs and manufactures planetary gear vs harmonic drive for all the industrial areas with competence, innovation, and unique professionalism. As one of the mature gearbox companies in China, Laifual Drive exceeds customer expectations with the highest level of detailed engineering, lean manufacturing, and quality assurance available in the global marketplace. Modularity, accuracy, and performance will allow you to select from the Laifual Drive range. The product can best suit your application and optimize overall design costs. Laifual Drive's products are widely used on robots, automation equipment (CNC equipment, rotation equipment), medical equipment, aerospace and etc.