How to clean bearings：
Many friends know that most of the newly bought bearings are coated with grease, but the grease is mainly used to prevent the bearings from rusting, and does not play a lubricating role, while the bearings are especially easy to hide dirt, and it is difficult to clean them thoroughly. Even if you buy a bearing without lubrication, over time, but also because of the magnetic and airflow role resulting in the adsorption of dust. Then mixed with sweat, water vapor, etc. in the bearing, between the ball, the gap gathered to form “dirt communities”, which is “fatal” to the rotation of the bearing.
After a long time, the bearings will be in contact with the dust, oil or water in the air, resulting in dryness and rust, which affects the operation of the bearings. At this point, the bearing cleaning is very important.
When disassembling the bearing for maintenance, first record the appearance of the bearing, confirm the residual amount of lubricant, take a sample of the lubricant used for inspection, cleaning grease from bearings.
The selected cleaning agent, generally speaking, sealed in the bearing on the antirust oil, can be cleaned with solvent-based cleaning agent. If there is a thicker anti-rust oil on the bearing, you can first use the metal parts solvent-based oil cleaner, appropriate heating dissolved cleaning, to be dissolved on the surface anti-rust grease removed, and then wipe can be,also cleaning bearings with isopropyl alcohol
When cleaning, should first pinch the inner ring of the bearing, the other hand slowly turn the outer ring, until the rolling body of the bearing, raceway, cage on the oil completely washed off, and then clean the surface of the outer ring of the bearing.
At the beginning of the cleaning, it is advisable to rotate slowly and rock back and forth, but not to rotate with excessive force, otherwise the bearing raceway and rolling body will be easily attached by dirt. When the quantity of bearing cleaning is large, it can be divided into two steps of coarse and fine cleaning. When rough cleaning, if the bearing is rotated with dirt, the rolling surface of the bearing will be damaged, so care should be taken. In the rough cleaning oil, use a brush to remove the grease, adhesion, roughly clean, and then move to fine cleaning. Fine cleaning, is the bearing in the cleaning oil while rotating, while carefully clean.
For the inconvenience of disassembly of the bearing, you can first use parts cleaning agent rinse, so that the old oil melted, and then use iron hooks or small spoons to wash out the residual oil in the bearing, cleaning, take care not to have open fire.
After the bearing is cleaned, observe carefully, there will always be some remaining oil in the inner and outer ring raceway, on the rolling body and in the gap of the cage. If there is a rustling sound between the fingers, the bearing is not clean and should be washed again.
Finally the bearing in hand, pinch the inner ring, pivot the outer ring horizontal rotation (large bearings can be placed on the assembly table, inner ring pad pad, outer ring overhang, pressing the inner circle, turning the outer ring), to rotate flexible, no stalling, no jumping for qualified.
To clean the bearing, after adding lubricant, should be placed on the assembly table, the following pad with a net cloth or paper pad, covered with plastic sheeting, to be assembled, not allowed on the ground or on the box. When moving the bearing, it should not be taken by hand directly, it should be wrapped up with canvas gloves or net cloth before taking it, otherwise the bearing surface may produce fingerprint rust. Both sides with dust cover or seal bearing, and coated with anti-rust, lubrication dual-use grease bearings, because in the manufacture of grease has been injected, so do not clean before installation.
Bearings are precision parts, and their use must be carried out accordingly and carefully. No matter how high performance bearings are used, if they are not used properly, they will not get the expected high performance. Precautions on the use of bearings are as follows.
① Keep the bearing and its surrounding environment clean
Even if the tiny dust invisible to the naked eye enters the bearing, it will increase the wear, vibration and noise of the bearing. Bearings and their surrounding accessories should be kept clean, especially dust and dirt, and tools and environment must also be kept clean.
② Cautions when using and installing Do not allow strong stamping, direct hammering of the bearing, or pressure transmission through the rolling body.
③Use suitable and accurate installation tools，Try to use special tools, strongly avoid the use of cloth and short fiber and other things.
④Prevent the bearing from rusting，When holding the bearing directly by hand, fully wash away the sweat on your hands and apply high quality mineral oil before operation, especially pay attention to rust prevention in rainy season and summer. However, under certain special operating conditions, bearings can obtain a longer life than conventionally calculated, especially under light loads. These special operating conditions are when the rolling surfaces are effectively divided by a lubricant film and when the possible surface damage caused by contaminants is limited.
Therefore, it is crucial to know how to clean bearings