According to factors such as function, shape, and purpose, pressure rollers can be classified into different standards. Common standards include the following:

1. Flywheel type standard: commonly used in mechanical equipment such as electric motors, generators, hydraulic pumps, etc. Its function is to provide inertial traction.

2. Gear type standard: usually used in transmission systems, its function is to transmit power and speed.

3. Pulley type standard: can be used for guiding and turning ropes, ropes, plastic and metal hoses, etc.

4. Support wheel type standard: commonly found in various sensors, encoders, counters and other equipment.

5. Standard for roller type used in printing machines: Used on printing machines to maintain a certain pressure on the printing plate and paper, ensuring printing quality.

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