How to choose the viscosity of lubricating oil for small reducer?

Lubricating oil viscosity is an industry term.As the viscosity increases, the thicker the oil film between the friction surfaces of the moving parts, the stronger the protection of the friction surfaces.So what are the selection methods for the viscosity of lubricating oil for small reducers, and look at the following points.

1. The viscosity of lubricating oil for small reducers is mainly achieved by base oil and viscosity index improver. Among them, the viscosity of base oil is mainly related to molecular structure and molecular weight. The greater the average molecular weight, the greater the viscosity of the oil.

2. A good viscosity index agent should have strong viscosity increasing ability, good shear stability, good low temperature performance and thermal oxidation stability.

3. For lubricating oils of brands with viscosity at the same time, if unrefined base oil and viscosity index agent are used, although a certain viscosity standard can be achieved after deployment, the performance of viscosity-temperature and shear stability is poor, and the same can be achieved. Less than the specified life cycle.

In actual production, the lubricating oil viscosity of the small reducer can be selected according to the above method. For low-speed and heavy-duty reducers, better lubricating oil should be selected, and unrefined base oil or poor viscosity index agent should be selected as far as possible, because the base Both the oil and the viscosity index are better, and the more viscous the gear oil, the better the protection against all kinds of damage and the less wear and tear on the machine.

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