You can use ceramic can be achieved without self-lubricating

Bearing seals designed to prevent leakage of the lubricant inside the bearing parts, and to prevent harmful objects outside dust, moisture and foreign matter that penetrates into the bearing, so bearings can be lubricated to the oil in place Analysis of sealed bearings Sealed bearings can be separated from the inner ring and roller assembly and the outer ring with the composition of the cage can be installed separately. Roller and raceway contact at the contact line can be modified to reduce the stress concentration. Tapered roller bearings can withstand high radial and axial load. Because of the tapered roller bearing axial load can only pass one way, therefore, to pass in the opposite direction of the axial load will need to install another with symmetrical Tapered Roller Bearings.
Most of the amount of sealed bearings are single row tapered roller bearings. In the car's front wheels in recent years to spend the small size of the sealed angular contact ball bearing. Four-row tapered roller bearings used in large-scale cold rolling mill and other heavy machines.

Deep groove ball bearing are bearing the most common type

Deep groove ball bearing are bearing the most common type. The basic model consists of a deep groove ball bearing outer ring, an inner ring, a steel ball and a group of holding structure into. Deep groove ball bearing type has two kinds of single and double row deep groove ball structure also split seal and open two structures, open means bearing structure without seals, insert ball bearingseal deep groove ball into dust seal and oil seal.
Deep groove ball bearings mainly take radial load, but also to support radial and axial load. When the only radial load, the contact angle is zero. When the deep groove ball bearings with a larger radial clearance, the performance with angular contact bearings, can withstand greater axial load, deep groove ball bearing friction coefficient is small, speed is also very high.

Precision bearings in accordance with the ISO classification standard

precision bearing in accordance with the classification standards ISO divided into:. P0, P6, P5, P4, P2 grade increased sequentially, which is normal precision P0, other grades are precision level. Of course, different grading standards, different types of bearings, their grading methods are different, but the meaning is the one to. super-precision bearing performance requirements on a rotating body having high runout accuracy, high-speed rotation and low friction and friction change.
Since precision bearings themselves accuracy 1μm or less, thus requiring its matching parts (shaft, bearing, cap, ring, etc.) have a high dimensional accuracy and shape accuracy, especially to control the accuracy of the mating surfaces and bearing the same horizontal, which is crucial, but also the most easily overlooked.

Bearing the measurement definition

bearing measurement outer diameter, diameter size, height, which is the basic of the three dimensions was detected. Usually with a caliper and micrometer, or folders on the dial indicator gauge blocks, accurate point. With an inner diameter of the instrument can be beat and the outer diameter of the bearing runout. The main instruments for detecting bearing accuracy class enough.
Entity One way bearing GCr15 bearing steel, heat-treated hardness HRC61-65, bearing small size and high load carrying capacity, there is sufficient space to store the grease, may have come a long lubrication intervals.

Rolling mill bearingtechnology, is a systems engineering technology

Rolling mill bearingtechnology, is a systems engineering technology, and also the multidisciplinary field of comprehensive engineering technology, its development speed and ability to support the formation of a reflection of the pace of development of Chinese industry and the level achieved. Hereby briefly discusses several key aspects from running technology, manufacturing technology, testing technology, theoretical research, product development, complete sets of capacity.
Development of oil film bearing main parts, began in the late 1950s,aviation bearing in the case of a no pattern, nor information, three non-proprietary equipment carried. Development of oil film bearing the main parts, and easy, from material selection, process route, processing methods to special tooling design and manufacturing has a set of working procedures. From the choice of materials, taking into account the drogue and friction material pairing, drogue forging process of combining steel bushing sleeve and friction materials, steel sleeve process

Mill Bearing Testing Technology

It consists of two parts: one to measure the technical parts processing, and another part of the experimental research of measurement techniques.
Due to the high precision four row cylindrical roller bearing the main parts, require accurate measurement and fast. To meet this requirement, the first to have high-precision measuring instruments (a) and with the support of auxiliary equipment (a), while the measure of quality control and post-processing of the measurement process is completed, it is necessary to perform scientific measurements methods and have the technical skill. To this end, in addition to the purchase, custom precision measuring instruments (a), but also the design, manufacture of special equipment (a) and accompanied by the implementation of a scientific measurement methods and procedures. This ensures that the measurement repeatability, high precision.
To better understand the situation when the oil film bearing operating parameters, and to explore the regularity, Taiyuan Heavy Machinery Factory since 1972 has done a lot of lab bench to measure and our row cylindrical roller bearings in actual work of running the load, rotation, power, oil and other measurements external internal parameters. Test range, including the film pressure field, film thickness field and temperature field inside the bearing oil film work area, etc., the field of the measurement of these unconventional nature, from the measurement sensor to the secondary instrument, no ready to buy.
So, to its own research. Taiyuan Heavy Machinery Factory as the main strength of the laboratory, built a professional test team, with Tsinghua University and other units of the joint research, carried out research, development work testing techniques and instrumentation, we have conducted a resistive, inductive, capacitive and Eddy Current Testing Technology and a secondary instrument of research and development, and succeeded in obtaining a large amount of data, good repeatability, regularity, high measurement accuracy. Meanwhile, also on related technologies, including calibration, interference, signal delivery rotation, and simultaneous measurement of multiple signals, recording and printing were studied and applied.

Mill Bearing Operation Technology

Including oil film Cross roller bearing parts store, cleaning, installation, commissioning, operation, maintenance, diagnosis, management, a set of knowledge and skills. Correct use of running technology, is a reliable guarantee for the safe operation of the bearing.
The early 1950s, China's only Angang cold rolling mill oil film bearing reversing mill equipment. Its operation and management, in full accordance with the relevant regulations of the Soviet Union was. The traditional process, the pressure is not rolling, rolling speed is low, the lubrication system is also very simple to run skill levels are relatively low. But in actual operation, the relevant management and technical personnel and operations workers work very seriously, in strict accordance with procedures to do, accumulated use, maintenance experience.
However, due to lack of understanding of the Four-Row Cylindrical Roller Bearing works, some less sensible procedure has been followed for almost two years, for example, after bearing parts installed, do pressure test 35N / cm2, if the oil spill, which tighten rotary sealing, until no leakage so far. However, such a pressure test after adjustment, the effect is not good to use, but, seal life is short. This seal is with the skeleton of "J" type seal, is to rely on lip seal, pressure test immediately after the transfer, it is no longer lips sealed, but a stubbornly clinging to the surface of the sealing strip rotation. But after all fundamental, successfully run oil film bearing, or start from here.