Housing: Serving as the outer shell of the reducer, the housing not only supports and protects the internal components but also plays a crucial role in ensuring the overall structural integrity and operational safety.

　　Housing: Serving as the outer shell of the gearbox, the housing not only supports and protects the internal components but also withstands various stresses generated during operation through a well‑designed structure. The quality of the housing is a critical factor in ensuring the gearbox’s performance.

　　Input shaft: Connected to an electric motor or other power source, it transmits power to the gearbox. In the R...S and RF...S series, the input shaft is also equipped with an input flange for easy coupling to the motor.

　　Intermediate shaft: Located between the input and output shafts, it meshes with gears on both the input and output shafts via helical gears, enabling power transmission and speed reduction. The gears on the intermediate shaft undergo high-precision gear grinding to ensure smooth operation and accurate transmission.

　　Output shaft: Transmits the reduced-speed power to the driven machine. In the RF series, the output shaft is also equipped with an output flange at its end, facilitating connection to the downstream equipment.

　　Helical gears: the core transmission components of a reducer, featuring a hardened tooth surface design to enhance load-carrying capacity and wear resistance. The helical gear engagement ensures smooth operation, low noise, and minimal vibration.

　　The R-series helical gear reducers with hardened tooth surfaces feature a modular design and are manufactured in accordance with international technical standards, boasting a high level of technological sophistication. Their structure comprises a helical gear transmission assembly, forged steel components, and a rigid cast‑iron housing; the surface undergoes high‑frequency heat treatment to ensure exceptional durability and long service life. This treatment not only enhances the hardness and wear resistance of the gears but, combined with precision machining, also guarantees shaft parallelism and accurate positioning of the bearings.

　　The R-series gear reducers are available in 20 sizes, encompassing both single-stage and multi-stage (e.g., two‑stage, three‑stage) models. Torque ranges from 50 to 18,000 Nm, with a broad ratio range spanning i = 1.30 to i = 289.74; even two‑stage units can achieve a ratio of i = 27.001. This finely graded torque and speed‑ratio spectrum is highly uncommon in the market, enabling it to meet the demands of diverse operating conditions.

　　The R-series gear reducers feature an integral cast housing, offering excellent structural rigidity and helping to enhance shaft strength and bearing life. They support multiple mounting configurations, including foot mounting, flange mounting, and flange mounting with an extended bearing housing, catering to diverse equipment requirements. Furthermore, foot and flange mountings are further subdivided into small‑flange and large‑flange options, providing greater flexibility in selection.

　　The R-series helical gear reducers with hardened tooth surfaces transmit power and reduce speed through the meshing of helical gears. The specific transmission process comprises three stages: the input stage, the intermediate stage, and the output stage.

　　Input stage: Composed of a high-speed pinion and a large gear, it transmits the motor’s high-speed rotation to the intermediate shaft.

　　Intermediate stage: Further reduces speed and increases torque, providing a stable power input to the output stage.

　　Output stage: Transmits the power, after multiple stages of speed reduction, to the working machine, thereby achieving the required operating speed and torque.

　　IV. Features and Advantages

　　Smooth transmission: The helical gear engagement ensures a smooth, shock-free operation with low noise and vibration.

　　High load-carrying capacity: The hardened tooth surface design enhances the gear’s wear resistance and load-bearing capability, making it suitable for heavy-duty operating conditions.

　　High transmission efficiency: The multi-stage transmission design minimizes energy losses, resulting in high transmission efficiency.

　　Compact Structure: The overall structural design is rational and compact, facilitating installation and maintenance.