How to judge its quality when buying coupling model and how to choose

Coupling of the category is numerous, such as arrange ushering bearings, linear bearings, stainless steel bearings, and so on are often we can see. There are a lot of people didn't pay attention to the quality, when buying coupling results back to install the discovered problems, in order to lead to cannot work normally. A lot of businesses now two cycle, so the quality is also available in the market is uneven, so how do we distinguish coupling quality? Come to learn how to judge the quality of the coupling with the author! How to distinguish the coupling with the material of the coupling is commonly used by the quality of phenolic plastic, nylon, ptfe and so on. But most of the coupling is used to make steel, and now have to steel prices have been high, so some bad vendors to reduce costs, in the aspects of the raw material of coupling drive under the foot! Reduce the types of steel, with good filling time! Use ordinary materials, including steel, carbon steel, malleable iron, moreover also use iron pipe instead of steel products. Bearing steel is green, and low price of steel in appearance color white mostly, so we can see from the coupling appearance can color has a lot of difference. How to choose and coupling in type selection, let the prime mover and work machine end half coupling length is less than its axial elongation 10 - 30 mm as well. To facilitate the installation, it is best to put 120 - two and a half coupling - 150 incubator or preheated in the tank, to make the inner hole size up is easy to install. After installation to ensure not bulge half coupling end face of spindle nose, flush as well. Detect the distance between the two half couplings: along the two inner measure 3 - half coupling flange - Reading averaged 4 points, and lengthened the period and the sum of two group of the measured size of diaphragm, the error control in 0 - 0. 4 mm range.