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  • Writer's pictureLo Jm

Accuracy division of gears

1.What is gear?

A gear is a mechanical part, usually round or nearly round, with toothed edges.

The main function of gears is to transmit motion and power. Through the mutual meshing of gear teeth, power is transmitted from one shaft to another, and the rotation speed and torque can be changed.

Gears come in many types and specifications and are widely used in various mechanical transmission systems.

The classification of gear accuracy is usually carried out in accordance with national standards (such as JB179-83). It is divided into 12 accuracy levels, represented by numbers 0 to 12, among which level 0 has the highest accuracy and level 12 has the lowest accuracy. The higher the accuracy level, the better the manufacturing accuracy and transmission performance of the gear, but the corresponding manufacturing cost will be higher.

2.Classification of gear accuracy

The selection of gear accuracy level requires comprehensive consideration of transmission requirements, load conditions, usage environment and other factors. Generally speaking, for occasions with high transmission accuracy requirements, large loads, and harsh operating environments, a higher accuracy level should be selected; for some general transmissions or situations with low accuracy requirements, a lower accuracy level can be selected. Accuracy level.

In actual applications, engineers will conduct a comprehensive analysis based on specific conditions to determine the appropriate gear accuracy level. At the same time, it should also be noted that the improvement of gear accuracy not only depends on the choice of accuracy grade, but is also closely related to factors such as gear design and manufacturing process.

3.Several factors need to be considered when selecting the right gear accuracy grade for a specific application:

1. Transmission accuracy requirements: If you have high transmission accuracy requirements, such as precision instruments, CNC machine tools, etc., you need to choose a higher accuracy level.

2. Load size: Under heavy load conditions, a higher precision level may be required to ensure the strength and stability of the gear.

3. Working environment: In harsh environments, higher precision may be required to reduce wear and error accumulation.

4. Cost budget: The higher the accuracy level, the higher the cost. There needs to be a trade-off between accuracy and cost.

5. Transmission speed: During high-speed transmission, higher precision may be required to avoid vibration and noise.

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