The FHG-IV series harmonic drive features an input shaft configuration. It adopts an integrated sealed flange structure that combines harmonic drive components into a single unit, internally filled with specialized lubricating grease for simplified equipment integration. A high-rigidity cross roller bearing (main bearing) is integrated within the assembly. It is typically configured with either fixed circular spline and flexspline output or fixed flexspline and circular spline output.

The FHG-III series harmonic drive features a large hollow shaft structure. It adopts an integrated sealed flange design that combines harmonic drive components into a single unit, pre-filled with specialized lubricating grease for simplified equipment assembly. A high-rigidity cross roller bearing (main bearing) is integrated internally. This system is typically configured with either fixed circular spline and flexspline output or fixed flexspline and circular spline output.

The FHG-II series strain wave drive features a cross roller bearing coupling structure for its wave generator, allowing for automatic fine-tuning of coaxiality. The size of the cam shaft hole can be adjusted according to the customer's motor model, with the input shaft directly fitting into the inner bore of the wave generator and connected via a flat key. It incorporates a built-in high-rigidity cross roller bearing (main bearing). Generally, it is used with the rigid wheel end fixed and the flexspline end output, or with the flexspline fixed and the rigid wheel end output as the connection method.

The FHG-I series strain wave gear box features an integrated cam structure for its wave generator. The size of the cam shaft hole can be adjusted according to the customer's motor model, with the input shaft directly fitting into the inner bore of the wave generator and connected via a flat key. It incorporates a built-in high-rigidity cross roller bearing (main bearing). Generally, it is used with the rigid wheel end fixed and the flexspline end output, or with the flexspline fixed and the rigid wheel end output as the connection method.

The FSG-II series strain wave gear utilizes a cross slider coupling mechanism for its wave generator. The cam shaft bore dimensions can be customized to accommodate specific motor models. The input shaft directly engages with the wave generator’s inner bore through a keyed connection. This configuration is typically implemented with the circular spline fixed at the base and the flexspline serving as the output end.

The FSG-I series Strain wave gear employs an integrated cam-type wave generator. The cam shaft bore dimensions can be customized to match customer-specific motor models. The input shaft directly interfaces with the wave generator's inner bore via a keyed connection. This system is typically configured with the circular spline fixed at the base and the flexspline functioning as the output end.

The FHD Series harmonic reducer employs an ultra-short top-hat flexspline design, designed for applications demanding extreme compactness and lightweight performance.The FHD Combined Type pursues the ultimate flat-profile design. Compared to the FHG series, its axial length is reduced by approximately 50%. Equipped with high-rigidity cross roller bearings on the output side, it is ideally suited for applications requiring space-constrained designs.

The FSD series harmonic gear adopts an ultra-short cup-type flexspline structural design, achieving approximately 50% shorter axial length compared to the FSG series. It is specifically designed for applications requiring extreme compactness and weight reduction.
In recent years, emerging fields such as humanoid robots, aerospace systems, along with LCD panel and semiconductor manufacturing equipment, have been pursuing ultra-thin solutions under the strict spatial limitations of production line systems.
Building on the lightweight and compact features of harmonic gear transmissions, the FSD series meets market demands by retaining the proven performance of traditional products while implementing bold structural innovations.

The differential gear FDS series is divided into the combined type and the component type. The combined type aims to integrate the differential mechanism into a single unit for easy assembly into equipment, and its housing allows direct mounting of transmission gears, pulleys, etc. The component type pursues a flat and thin design, enabling customers to design their own encapsulation housing and optimize device space according to their structural requirements.
Utilizing Harmonic Drive's unique operating principle, it is an ultra-compact differential device capable of performing phase and timing fine-tuning during operation.
The combined type of the FDS series shares the same four core components as the pancake component type, except that the combined type includes additional front and rear sealing flanges and support bearings. The FDS series operates on the same working principle as the cup-type FSG series. The shape of the pancake flexspline is identical to the cross-section of the cup flexspline's base, and the wave generator bearings are arranged in two rows, with the tooth width of the circular spline and flexspline increased to handle higher torque capacity. Additionally, the pancake type incorporates an extra circular spline with the same number of teeth as the flexspline for connection to the output shaft.