currently the main use of rigid coupling sleeve plus tapered pin joint connection methods, but most of the feed motor shaft is equipped with flat key. This connection, used over time, began to taper off loose, keyway side of the gap increases, and sometimes even lead to loss cone sales, resulting in an unstable part machining dimensions. There are two ways to solve:

(1) using a special conical threaded pin small headband, plus washers with lock nuts to prevent tapered off due to loosening caused by rapid conversion. This method can solve the problem of loose tapered off, but also to reduce the level of torque key is exposed. Of course, this method due to small head pins with conical nuts must ensure that there is a certain rotation coupling space.
 

(2) the use of the flexibility of two and a small tapered pins to connect to replace sales, although this method does not taper off the connection method with high precision, but it can solve the problem tapered off loose, flexible pin has a certain flexibility to decomposition of the torque to bear some flat key, and compact structure, the assembly is also very convenient. The application is in the maintenance of good results. However, the assembly should pay attention to the size requirements of each spring pin assembly into the 180 °, otherwise it will affect the accuracy of machining parts.



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