Iron Shielded Deep Groove Ball Bearing is one type of ball bearings. shields are non-contact metallic (carbon or stainless steel) devices which allow high-speed operation but offer limited protection against the ingress of moisture and dirt. but do not protect against liquids. They add no friction during operation and therefore do not generate heat build-up. Iron shielded deep groove ball bearings often have steel shields installed on one or both sides and are pre-lubricated with grease. While many different retainers are available, pressed steel cages are most commonly used.
Bearing dust shields have been available almost as long as Ball Bearing itself. Shields are needed to stop the grease lubrication used in these bearings from leaking out. This is particularly important in applications where grease leakage may contaminate the product. The main impetus towards shielded bearings comes from the growing use of [sealed-for-life" bearings in items such as white goods, cars and power tools. Shields are fitted in the outer ring and do not make contact with the inner ring, but form a narrow gap with it.
Depending on the bearing design, series and size, MANU supplies shields in different designs.
With one shield (-Z) on one side or two shields (-2Z/ZZ) on both sides; Due to the manufacturing processes used, open bearings can have turned recesses in the outer ring for shields.
Celarance:
Internal clearance provides the bearing room for expansion between the bearing races and will add a small amount of play between the two rings. Large clearance C3/C4 usually used in harsh environment. with good anti-seize performance used in particularly harsh environment.
Tolerances
The standard version of our single-row deep groove ball bearings has the tolerance class P0
(designs with tighter tolerances available upon request)
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Iron Shielded Deep Groove Ball Bearing Iron Seals Ball Bearing,Iron Sealed Ball Bearing,Iron Shielded Bearing,Steel Shielded Bearing Shandong Xinkaite Bearing Co., Ltd. , https://www.idlerbearing.nl
The Western Shanxi crude oil and refined oil pipeline project from Shanshan in Xinjiang and Urumqi to Lanzhou is a national key construction project. The total length of crude oil pipelines and feeders in Xinjiang from Shanshan to Lanzhou, Gansu Province is 1878.4 kilometers. It mainly transports crude oil extracted from the Tarim Basin, Junggar Basin, and Turpan-Hami Basin. The designed annual oil transmission capacity is 20 million tons; Urumqi is located in Lanzhou, Gansu Province. The total length of the main pipelines and branch lines of the refined oil pipelines is 1,903 kilometers. It mainly transports refined oil produced by Urumqi Petrochemical Company, Karamay Petrochemical Company and Dushanzi Petrochemical Company, and is designed to deliver 10 million tons of oil annually. The Western China crude oil product pipeline was started construction in September 2004. The two pipelines were laid in the same trenches and the stations were merged. The total project investment was RMB 14.6 billion. At present, the main pipeline project has entered the final stage, and various preliminary preparations for transporting refined oil products are intensifying.
According to the relevant personage of China National Petroleum Corporation's Western Pipeline Co., Ltd., for a long time, there has been a serious imbalance in production and consumption in the oil industry in China. Most of the oil in the central and eastern regions needs to be transferred from other places. The oil production in the northwest region is very rich, and the need for “transmitting oil from west to east†is very urgent. At present, China's railway oil transportation has become saturated, and pipeline transportation has become an inevitable choice for the implementation of the “West-East Oil Transportâ€. The construction of these two major pipelines with large volumes, long distances, and high pressures will form a complete economic chain along the western region of production, refining, chemical production, transportation and sales, and open access to oil channels linked to Central Asia. The northeast and north China pipeline networks are connected into a backbone pipeline network, connecting the oil pipelines and petrochemical enterprises in Xinjiang, Gansu, eastern and southwest regions, so that the abundant resources in the west and the eastern market can be effectively connected, forming the “West Oil East†, North Oil South tune "a huge oil supply network structure.
China's Strategic Oil Production Pipeline Passing the West China Oil Pipeline into Operation in July
The reporter learned from the China National Petroleum Corporation's West Pipeline Co., Ltd. on June 12 that the western crude oil and refined product pipelines in Shanxi Shanshan and Wulumuqi and Lanzhou have been basically connected. The refined oil pipelines will fully start the pre-acceptance work on June 14. , took the lead in the completion phase. It is expected that the refined oil pipeline will be put into operation in July this year, and the crude oil pipeline will be put into full production next summer. After these two pipelines are completed, they will be linked with the oil pipelines in the eastern region to form the strategic route of “West China Oil Transportationâ€.