成年性生交大片免费看-成年性午夜免费视频网站-成年在线视频-成年在线网站免费观看无广告-成片免费观看-成片免费观看视频大全

Precision angular contact ball bearings are mainly used for high-speed rotating applications such as machine tool spindles, high-speed motors, machine tool ball screws, gas turbines, centrifugal separators, etc. Bearings are required to have high precisio

First, the spindle rotation during strong cutting may be caused by the looseness of the transmission belt connected to the spindle motor and the spindle. The torque of the spindle transmission is too small, so that the torque is insufficient during strong

Theoretically, the service life of rolling bearings in centrifugal pumps in electric spindle bearings is 20,000 to 80,000 hours. However, the actual life depends on many factors - premature bearing failures can lead to costly equipment downtime, and somet

Since the first production of bearings in Japan in 1916, NSK has developed and supplied various types of bearings as a bearing pioneer in Japan, and has made great contributions to the development of the industry and the advancement of technology. With th

Headquartered in Gothenburg, Sweden, SKF Group is a leader in bearing technology and manufacturing. Sven Wingquist invented the double-row automatic ball bearing in 1905, and in 1907 founded Svenska Kullargerfabriken Swedish ball bearing manufacturing com

The FAG bearing brand is also inspired by a genius. As early as 1883, in the small town of Schweinfurt in Germany, Friedrich Fischer designed a special steel ball grinding machine, which for the first time made the use of grinding to produce a complete sp