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: 一级日韩 | 免费看片黄| 91精品乱码一区二区三区 | 欧美成人免费毛片 | 国产亚洲精品久久久久91网站 | xxxx免费国产在线视频 | 久久久久久久久一级毛片 | 免费播放国产性色生活片 | 奇米网久久 | 这里只有精品免费视频 | 国产一级毛片大陆 | 亚洲视频 欧美视频 | 欧美亚洲另类视频 | 一区二区日本 | 久热996re这里有精品 | 在线观看人成午夜影片 | 久久婷婷一区二区三区 | 四虎精品在线 | 99久久精品免费精品国产 | 国产视频自拍一区 | 欧美黑人喷潮水xxxx | 最近中文字幕无吗高清视频 | 亚洲国产精品久久久天堂麻豆 | 日日天天| 国产精品视频免费的 | 久久精品国产只有精品6 | 91亚洲精品一区二区自 | 奇米影视777欧美在线观看 | 美女被视频在线看九色 | 日韩精品一区二区三区在线观看 | 日本黄色一级毛片 | 欧美日韩免费在线 | 成人亚洲在线 | 手机看片一区二区 | 欧美日韩一二三 | 欧美成人爽毛片在线视频 | 亚洲乱码一区二区三区国产精品 | 天天看天天干 | 日本在线无 | 久久99精品国产麻豆 | 免费看91毛片 |