Five precautions for the use of imported bearings, five ways to avoid failure

Precautions for use

Rolling bearings make precision parts, so they need to be cautious when using them. They use high-performance imported bearings. If they are not used properly, they can not achieve the expected performance. Therefore, the following items should be used when using bearings:

Keep the bearings and their surroundings clean. Even if the smiling dust that is invisible to the naked eye enters the bearing, it will increase the wear, vibration and noise of the bearing.

Care must be taken when using the installation. Strong stamping is not allowed. It is not allowed to directly hit the bearing with a hammer. It is not allowed to transmit pressure through the rolling elements.

Use suitable and accurate installation tools, try to use special tools, and try to avoid the use of cloth and short fibers.

To prevent the corrosion of imported bearings, when taking the bearing directly by hand, wash the sweat on the hand and apply it with high-quality mineral oil before handling. In the rainy season and summer, pay special attention to rust prevention.

Bearing cooperation

Matching choice

The inner and outer diameters of the rolling bearing are manufactured to standard tolerances. The tightness of the bearing inner ring to the shaft and the outer ring to the seat hole can only be achieved by controlling the tolerance of the journal and the tolerance of the seat hole. The inner ring of the bearing and the shaft are matched by a base hole, and the outer ring of the bearing and the seat hole are made by a shaft.

The correct choice of cooperation must be aware of the actual load conditions, operating temperatures and other requirements of the imported bearings, but it is actually very difficult. Therefore, most of the cases are based on the use of lint selection.

Load size

The amount of over-win between the ferrule and the shaft or casing depends on the size of the load. The heavier load uses a larger over-win, and the lighter load uses a smaller over-win.

   1. Bearing channel one-side extreme position peeling

The one-side extreme position spalling of the channel is mainly manifested by a severe spalling band at the interface between the channel and the rib. The cause is that the imported bearings are not installed properly or there is a sudden axial overload during operation. The countermeasure is to ensure that the bearing is installed in place or the free side bearing outer ring is matched to the clearance fit, so that the bearing is compensated when the bearing is overloaded.

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Detailed steps for maintenance of TIMKEN imported bearings

In order to fully utilize TIMKEN's imported bearings and maintain their proper performance for a long time, regular maintenance (regular inspection) must be done.
Through proper periodic inspections, early detection of failures and prevention of accidents are important to improve productivity and economy.
1, cleaning
When removing the TIMKEN imported bearings, first take a look at the appearance with photography. Also, verify the amount of lubricant remaining and sample the lubricant before cleaning the bearings.
a. The cleaning of the bearing is carried out by rough washing and fine washing, and a metal mesh frame can be placed on the bottom of the used container.
b. When rough washing, remove the grease or adhesive with a brush or the like in the oil. At this time, if the bearing is rotated in the oil, be careful that the rolling surface will be damaged by foreign matter or the like.
c. When washing finely, slowly rotate the bearing in the oil and carry out it carefully.
The cleaning agent generally used is a neutral non-aqueous diesel oil or kerosene, and a warm alkali liquid or the like is sometimes used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean.
Immediately after cleaning, apply anti-rust oil or anti-rust grease to the bearing.
2, inspection and judgment
In order to judge whether the removed TIMKEN bearings can be reused, it is necessary to check the dimensional accuracy, rotation accuracy, internal clearance and mating surfaces, raceways, cages and seals.
Regarding the inspection result, it can be judged by a person who is using a conventional bearing or a proficient bearing.

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