Miniature Ball Bearings With The Choice
Miniature Ball Bearings With the choice
The use of bearings
Precautions for use
Rolling bearings are precision parts, and therefore require a corresponding attitude in use, both the use of high-performance bearings, if used improperly, can not achieve the desired performance results, so the use of bearings should pay attention to the following:
▲, to keep the bearing and its surrounding environment clean. Even if the invisible tiny dust into the bearing, will increase the bearing wear, vibration and noise.
▲, the use of the installation to be careful, do not allow strong stamping, do not allow the hammer directly hit the bearing, does not allow the transfer of pressure through the rolling body.
▲, the use of appropriate and accurate installation tools, try to use special tools, try to avoid the use of cloth and short fiber and the like.
▲, to prevent the corrosion of the bearing, take the bearings directly by hand, to fully wash away the sweat on hand, and coated with high-quality mineral oil and then operate in the rainy season and summer, in particular, should pay attention to rust.
▲, with the choice
The inner diameter and outer diameter dimensions of the rolling bearing are made according to the standard tolerances. The tightening degree of the bearing inner ring and the shaft, outer ring and the seat hole can only be achieved by controlling the tolerance of the journal and the tolerance of the hole. Bearing the inner ring and the shaft with the base hole system, bearing outer ring and seat with the use of machine shaft system.
Correct choice of cooperation, we must know the actual load conditions, operating temperature and other requirements, but in fact it is very difficult. Therefore, most cases are based on the use of lapping selection.
▲, load size
The amount of interference between the ring and the shaft or the shell depends on the size of the load, the heavier load uses a larger win, and the lighter load uses a smaller win.
◆ rings and rolling material:
Ferrule and rolling elements are usually made of high carbon chromium bearing steel. Most of the bearings, the use of JIS steel SUJ2, is the domestic chrome steel (GCr15).
SUJ2 chemical composition in the world, as the bearing material has been standardized. For example: with the AISL52100 (US), DIN100Cr6 (West Germany), BS535A99 (UK), etc. are the same kind of steel.
In addition to the above-mentioned steel grades, high-speed steel excellent in heat resistance and stainless steel with good corrosion resistance are used according to special applications. Detail visible stainless steel bearings.