Recently, the signing of a memorandum of cooperation between Wenzhou Inspection and Quarantine Bureau and Bureau Veritas Inspection and Testing Co., Ltd. and the opening ceremony of the Wenzhou Branch of the Zhejiang Institute of Inspection and Quarantine was held at the Overseas Chinese Hotel in Wenzhou. This ceremonial event marked that Wenzhou shoe companies could then carry out an internationally efficient test at their doorsteps without going to Shanghai or Guangzhou.
According to Ms. Sun, head of the Ministry of Foreign Trade of Wenzhou Mercedes-Benz Footwear Co., Ltd., some of the company’s previous tests were sent to Shanghai-related agencies by mail. The cost for one year was more than 100,000 yuan, and the testing period required 3-5 days. Testing can be done in Wenzhou, which is really convenient for companies.
In the first half of this year, Wenzhou Inspection and Quarantine Bureau inspected a total of 102,200 shipments of quarantine entry and exit goods valued at US$3.137 billion, an increase of 31.81% and 30.82% respectively year-on-year. The Bureau of Yangtze River Wenhu said that in order to be able to adapt to the rapid growth of inspection and quarantine operations, the Bureau and Bureau Veritas have reached a cooperation to complete the inspection business that was originally impossible for Wenzhou. In addition to lowering costs and improving product competitiveness, export companies in Wenzhou and surrounding areas can also receive convenient regulations and standards consulting services through this international testing and localization service.
NSK manufacture a full range of deep groove ball bearings. These bearings are the most common type and are used in a wide variety of applications.
Single-Row Deep Groove Ball Bearings
Pressed Steel Cages
Single-row deep groove ball bearings are the most common type of rolling bearings. Their use is very widespread.
In addition to open type bearings, these bearings often have steel shields or rubber seals installed on one or both sides and are prelubricated with grease. Also, snap rings are sometimes used on the periphery. As to cages, pressed steel ones are the most common.
For big deep groove ball bearings, machined brass cages are used.
Machined cages are also used for high speed applications.
Extra Small Ball Bearings and Miniature Ball Bearings
Miniature and instrument ball bearings can be divided into two basic types, deep groove and angular contact. The first (deep groove) can be further divided into the following five classes depending on their design details:
Standard type
Flanged outer ring
Extended inner ring
Expanded type in which one ring has a radial thickness that is larger than normal compared with the bearing width.
Thin section type in which both rings are extra thin in the radial direction. They can also be classified as: open, shielded, or sealed.
Maximum-Type Ball Bearings
Maximum-Type ball Bearings contain a larger number of balls than normal deep groove ball bearings because of filling slots in the inner and outer rings. Because of their filling slots, they are not suitable for applications with high axial loads. types of bearings have boundary dimensions equal to those of single-row deep groove ball bearings of Series 6200 and 6300 respectively. Besides the open type, ZZ type shielded bearings are also available. When using these bearings, it is important for the filling slot in the outer ring to be outside of the loaded zone as much as possible. Their cages are pressed steel.
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Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com