Can human oriented bearings withstand minus 40 degrees?

Hello! Whether the bearing can withstand low temperature mainly depends on its performance of lubrication.

Most of the grease used in human-oriented bearings can withstand low temperatures to -40 degrees, and there are special greases that can be as low as -50 degrees.

When in doubt, please ask.

The usual bearing industry and mining are basically between -40 degrees and 120 degrees.

Bearings beyond this range should either take measures from the main engine itself: for example, use special grease or lubricating oil; If the bearing itself takes measures, it is not only the limitation of lubrication, but also the working performance of the material itself, whether to use a cage of special materials (for plastic cages), and low-temperature resistant bearing steel; Or improve the structure, whether the clearance is adjusted according to the influence of temperature on the material, whether the matching size of the inner and outer rings should be taken into account when the temperature drops below -40 degrees, etc.

If this type of bearing is used, it is best to develop it from a professional bearing manufacturer.

The human-oriented bearing can withstand low temperatures, but it is not durable at low temperatures, because the cold air will freeze at low temperatures, and it is easy to rust when attached to the bearings.

Most of the grease used in human-oriented bearings can withstand low temperatures to minus -25 degrees to minus 120 degrees, and if used in a low-temperature environment, it is necessary to replace the low-temperature grease.

It is recommended to use bearings made of ceramic.

This allows the bearing to continue to operate without lack of grease.

1. Yes, ordinary grease is no problem.

2. The grease is mainly afraid of long-term high temperature above 75 degrees (or 80 degrees) (then the grease will slowly turn into liquid and flow away, at this time, the bearing end cover should be selected without gaps, and it will not flow away), 3. The low temperature of minus ten degrees is fine, of course, when it is just started, it is necessary to turn as slow as possible, so that because of friction and heating, the bearing temperature will slowly rise, and it can generally rise to room temperature, so that after a while, it will be no problem to rotate at high speed. It's like starting a car in winter to warm up and walk slowly for a short time, and then go to the high speed, so that the bearings will not break.

4. When the bearing rotates at high speed, if grease is used, the temperature will not be lower than the normal temperature, and it is better to be slightly colder in the weather, which is conducive to heat dissipation.

Hope it can be of little help to you.

No problem, but pay attention to whether the grease and seal are suitable for minus 10 degrees, especially the grease.

There is a special bearing lubricating oil for bearings, and the selection of bearing lubricating oil, generally speaking, must consider the following elements:

1. Appropriate viscosity.

As a lubricant for bearings, the most important thing is the viscosity of the oil at the service temperature. In operation, there must be sufficient viscosity to support the pressure, if the viscosity is not appropriate, there will be a loss of power, excessive temperature rise, burning and other phenomena.

2. Operating temperature.

The lubricating oil must be selected according to the temperature of the bearing in operation. The ideal bearing lubricant is one with low viscosity and low flow point. In addition, if the bearing needs to be exposed to high temperatures for a long time, it must have good oxidation stability, and there must be no oil that is easily volatile or carbonized on the bearing.

This is especially important when circulating the oil feed.

3. Bearing load.

When the bearing is under heavy load, the oil film on the bearing contact surface is easy to break, so it is necessary to have sufficient oil film strength. For example, when the load is heavy, it is sometimes necessary to use a high-viscosity oil that can create a strong oil film that is not easy to be squeezed out.

4. Running speed.

The operating speed must also be taken into account when selecting the appropriate lubricant. For fast rotational speeds, it is necessary to select a low-viscosity lubricating oil to prevent frictional resistance and temperature rise due to viscous friction. For example, in the case of large, low-speed journal bearings that operate under heavy loads, a high-viscosity lubricating oil is generally used to allow the oil film to support the heavy load.