How to classify the gear accuracy grades of gear reducers

For gear reducers, accuracy has always been an important indicator for measuring the quality of the reducer. Many customers will ask how high the accuracy of your gear reducer can reach, but there are also many customers who are not very familiar with this. Today, we will briefly introduce the accuracy to everyone.
The gear accuracy of gear reducers is specified in 12 levels, represented by the numbers 1, 2, 3,... 12 in order of accuracy from high to low. The commonly used accuracy levels are mostly 5-9.
In addition, according to the different requirements for the accuracy of motion, smoothness of transmission, and uniformity of load distribution, the tolerances of each accuracy level are divided into three groups in sequence: the first tolerance group, the second tolerance group, and the third tolerance group.
The accuracy level of gear reducer gears should be determined based on the purpose of transmission, operating conditions, transmission efficiency and circumferential speed, as well as other economic and technical indicators.
Grade 5 gears are precision grade.
Processing method: Fan machining is performed on precision gear machines with very small periodic errors. The tooth surface is ultimately precision ground, and large gears are precisely hobbed and then ground or shaved. The tooth surface roughness reaches 0.4-0.8.
Scope of use: Gears for precision indexing mechanisms; Used for gears with high speed and high requirements for smooth operation and noise; Gears for high-speed steam turbines, etc.
The 7th level gear is a relatively high precision level.
Processing method: Fan machining is performed on high-precision gear machines. Cutting non quenched tooth surfaces with high-precision cutting tools; Quenched gears require precision machining (grinding, shaving, grinding, etc.). The tooth surface roughness reaches 1.6.
Scope of use: Used for gears with high speed, low load, or reverse rotation; The feed gear of the machine tool requires a gear with matching motion; Medium speed reduction gear; Aircraft gears; Medium speed gears with herringbone teeth, etc.