China imported bearings and bearing gap

Bearing in our country plays an important role in industrial production and application.In terms of bearing production, although in the bearing industry of our country of economy of scale in the third world's bearing, but the precision technology and products and imported bearing gap is very large.

Domestic bearing quality difference at home and abroad
A large number of tests show that cage, sealing ring and processing quality of steel ball have different degrees of influence on bearing vibration.
The steel ball processing quality had the greatest influence on bearing vibration, the second is the processing quality of ring.
Is the most important factors affecting the steel ball and ring roundness, waviness and surface roughness and surface knocked wounded.
China steel ball products the most prominent problem is that the vibration value of discrete and serious surface defects (single point, the group of points, pits, etc.).
Although the surface roughness, size, shape, and error is not lower than the level of foreign, but after close set of bearing vibration value is high, and even makes an abnormal sound.
The main problem is uncontrolled waviness (no standards, no proper test and analysis instrument), it also suggests that machine tool vibration resistance is poorer, and the grinding wheel, grinding disc, cooling fluid and process parameter problems;
On the other hand, it is necessary to improve the management level, in order to avoid such as knock against injury, cuts and burns random quality problems.
For the ring, the most serious impact on the bearing vibration is the channel on the surface roughness and waviness.
For example, small deep groove ball bearings inside and outside channel of roundness is greater than 2 microns, will significantly influence on bearing vibration.
When the inner and outer raceway waviness is greater than 0.7 microns, the bearing vibration value will increase with the increase of waviness.Channel depletion injury serious vibration may increase more than 4 db, even may appear abnormal sound.
Bearing industry many gap
1. Industrial technology gap.
Skilled workers and even engineer position did not get the respect they deserve, most small and miniature bearing factory and bearing no highly qualified technical personnel, only low-end bearing products, are not competitive.
2. The material on the gap.
Alloy steel has always been the disadvantages of the domestic steel industry, high-end metallurgy technology has been developed strictly confidential.
In addition, insufficient research and development of domestic iron and steel company also caused the bearing industry in our country of birth defects.
3. The production technology gap.
The production process is the most important link in bearing manufacturing.
It is cyclical, quantitative qualitative change process.
In machine tool, for example, the bearing has a huge shadow on the machine tool accuracy, high precision bearing spindle bearing is the main customer base.
Domestic precision bearings and bearing abroad there is a huge gap between the life and precision.
4. The gap between the production equipments.
Bearing manufacturers and application between manufacturers is the relationship between fish and water.Without a good bearing, cannot produce good equipment, there are no reliable machine can't processing high quality bearings.
As far as I know, large processing manufacturers buy imported machine tools.
However, some relatively small domestic bearing manufacturers prefer to buy in the last century of the old machine, to turn them into special bearing of machine tools, also don't want to buy the domestic well-known brands of machine tools.
Supplier
BMB Bearings ia a precision bearing enterprise specializing in the production of double row angular contact ball bearings, double row deep groove ball bearings, and single row angular contact ball bearings. The company is a end bearings manufacturer enterprise producing double row angular contact ball bearings in China. Its models cover 3200 series, 3300 series, 3000 series, 3800 series, 3900 series, etc. The product accuracy grades are: P0, P6, P5, P4, and the products are widely applicable.
The company also maintains an extensive inventory of superior roller bearings, ball bearings, Deep Groove Ball Bearings, Selfaligning ball bearing, Angular Contact Ball Bearings, Thrust Ball Bearings and much more.