熟妇人妻无码中文字幕-熟妇人妻无码中文字幕老熟妇-熟妇人妻系列aⅴ无码专区友真希-熟妇人妻系列av无码一区二区-熟妇人妻一区二区三区四区-熟妇人妻中文av无码

Bearing market fish eye mixing, precision angular contact bearing selection method
7/10/2017 4:28:59 PM
       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 precision, high speed, low temperature, low vibration and a certain service life. The support members of the high-speed electric spindle are often used in pairs, and are the key components of the high-speed electric spindle of the inner surface grinding machine.
 
       Therefore, the selection of precision angular contact ball bearings is very important. He directly affects the processing performance of machine tools. Nowadays, the bearing market is mixed, and the fish eye is mixed. It is necessary to pay more attention to the selection of precision angular contact ball bearings.


Common methods for identifying bearing quality:
 
(1) Whether the outer packaging is clear; under normal circumstances, the factory brand has its own special designer to design the outer packaging, and arrange the production facilities to pass the production and production, so the packaging is very clear from the line to the color block. Unequivocal, some imported brands have unique designs designed to protect their intellectual property.
 
(2) Whether the steel printing is clear: brand words and labels will be printed on the bearing body. The font is very small, but most of the products produced by the factory use the stamping technology, and the type is pressed before the heat treatment, so the font is small, but the recess is deep and very clear. The fonts of counterfeit products are not only blurred, but because of the rough printing technology, the fonts float on the surface, and some can even be easily erased by hand.
 
(3) Is there any noise: hold the inner sleeve of the bearing with your left hand, and turn the outer sleeve with your right hand to make it rotate to hear if it has noise. Since most of the counterfeit products are out of production conditions and completely hand-worked, it is inevitable that impurities such as sand will be incorporated into the bearing body during the production process, so that noise will be generated when rotating. This is the biggest difference between a factory brand that strictly enforces production standards and operates with machines.
 
      Wuxi No. 2 Bearing is the largest manufacturer of precision angular contact ball bearings in China. It focuses on R&D and manufacturing of precision bearings for 26 years. It mainly conducts in-depth R&D and design for machine tool bearings, electric spindle bearings, engraving machine bearings, etc. The product precision is positioned in high precision. P4, P2 grade, does not produce bearings lower than P5 grade, the service life is far better than domestic counterparts, the best choice to replace imported bearings, and strive to become the first brand of angular contact ball bearings in China, and strive to provide customers with professional technical services. Create value.

主站蜘蛛池模板: 特黄特黄一级高清免费大片 | 国产精品午夜免费福利视频 | 亚洲玖玖 | 日韩精品成人在线 | 国产日韩精品一区在线观看播放 | 曰本还a大片免费无播放器 曰本黄色录像 | 亚洲欧洲尹人香蕉综合 | 狼狼色丁香久久婷婷综合五月 | 国产成人咱精品视频免费网站 | 色综合小说天天综合网 | 国产91精品一区二区麻豆网站 | 天天干天天玩天天操 | 99久久精品国产自免费 | 一级一级 a爱片免费视频 | www.色片| 嗯啊在线观看免费影院 | 国产永久在线 | 日本成本人观看免费视频fc2 | 91精品国产综合久久久久 | 香蕉视频网站在线播放 | 成人在线视频免费 | 天天干夜夜怕 | www.日日操| 免费永久欧美性色xo影院 | 青青青青青国产费线在线观看 | 97视频在线观看免费播放 | 国产色婷婷精品综合在线手机播放 | 欧美日韩在线免费观看 | 黄色毛片免费 | 亚洲人成在线观看 | 亚洲精品国产字幕久久不卡 | 99热最新在线观看 | 黑丝毛片 | 在线黄色影院 | 国产特级毛片aaaaaa高清 | 99久久久国产精品免费播放器 | 色花堂国产精品第二页 | 性xxx69xxx视频在线观看 | 91精品国产综合久久福利 | 成人一区专区在线观看 | 日b视频免费看 |