How to distinguish the quality of shaft coupling?

The quality of the coupling is fundamental, and the image of the coupling is also important.

The image mainly refers to the shape of the coupling, which is the bare state, such as surface roughness, surface treatment (painted state, blackened state or electroplated state), of course, the chamfer of the coupling, the shoulder The radius of the arc with the flange, the thickness of the flange, and the number of connecting bolts can all be classified as the image of the coupling. The image of the coupling is more important. He not only looks good, but also plays a great role in protecting the surface of the coupling. For example, the blackening treatment can prevent rust, and the electroplating treatment can make up for the blackening defects.

The quality of the coupling is a key factor related to the service life of the transmission system and the cost of use. The quality includes structural size design, raw materials and heat treatment processes, the strength and contact strength of accessories and parts, elastic compensation gap control, inner hole dimensional accuracy, inner hole surface roughness Degree, keyway width and other comprehensive evaluation.

Only if the coupling image and quality are both excellent, is a high-quality coupling; if welding replaces cast steel and cast steel replaces forged steel, the strength of the parts is low, and the lack of heat treatment process will only produce low-quality coupling products.

So how to distinguish the quality of the coupling?

First, we must carefully check the material of the coupling: most of the couplings are made of steel, and the color difference can be seen from the appearance of the coupling. The appearance of low-cost steel is mostly white;

Second, the strength performance index is an important parameter to measure the quality of the coupling, but this index is often realized by the user by comparing the failure form of the coupling when the transmission equipment reciprocates and starts or stops or there is a little overload;

Third, pay attention to the surface anti-rust treatment status;

Fourth, the strength grade and diameter number of connecting bolts.