It is also not conducive to mass production of parts

X is the first letter of the pinyin of planets. Developed by General Bureau of the First Ministry of Machinery. Southern mainly produces B series. Focus on imitating research and development.Planetary cycloid reducer began to originate in Germany. 

The first J in JXJ is the first letter of Jiangmen Pinyin. The third series is the JXJ series. It is also not conducive to mass production of parts. When the customer needs the X series, only the installation size of the machine is changed, and the B series is still used for the transmission part. Developed by the Electrical Engineering Bureau of the First Ministry of Machinery. 

The second series is the B series. B is the first letter of the pinyin of cycloid. Due to the lack of communication between the various bureaus of a machine department, the parts parameters of each reducer are different. The current common practice of manufacturers gear reducer Manufacturers is.

The first series is the X series. It causes inconvenience to customers' parts interchange. At present, the main manufacturers of X series  Later, it developed in Japan, and China began to develop in China in the 1960s and 1970s. North mainly produces X series. 

At that time, five manufacturers and three series were representative in China.. When the customer needs the B series, only the installation size of the machine is replaced, and the X series is still used for the transmission part.