In the current machining industry, the role of the top can not be replaced. The top is a very important part of the machine tool. When it has problems, it will affect the operation of the machine tool, especially the heavy-duty top. Therefore, as a machine tool operator, it is very important to master the top maintenance.

The rotary center of the machine tool is composed of several parts to form a rotatable structure. The center is inserted into the center body, and the bearing needle, thrust bearing and bearing are installed at their joint parts to solve the problems of centripetal force and axial force generated by the rotary center of the machine tool in the work.

As the machining surface of each part will have a certain degree of error (coaxiality error and roundness error) during manufacturing, after the rotary center is assembled, the central axis of the shell taper handle does not coincide with the central axis of the center, that is, there is a combination error between the two, and after the rolling bearing is worn, the center will also produce radial swing, thus reducing the machining accuracy. Therefore, these factors must be considered in the grinding of the center. The general precision is 0.01mm, and the precision of high-precision center is 0.004~0.008mm.

In fact, it is very convenient to disassemble and assemble the top when there is a problem. Today, take the most common rotary top as an example to illustrate the problem. The first step is to find the bearing cap on the rotary center. Some people may not know where the bearing cap is. The part with two small holes in the head is the top cap. Then, insert a tool into the hole and rotate it gently so that the bearing and cap can be taken out. Then, remove the screws at the rear of the cone sleeve end, and then use a tool to push the bearing out of the top shell from the rear. After replacing the deep groove bearing and thrust bearing, it is finished. When assembling, just reverse the order.

There are many kinds of lathe centers. We choose different lathe centers according to the specific conditions of use. The lathe center has high wear resistance and will not be damaged when using the lathe center. The lathe center is often used in some large equipment. We pay attention to daily maintenance when using the lathe center, so as to ensure the normal operation of the machine.