The inner diameter of the spindle of a precision machining equipment may have a huge impact on the performance of the machine compared to the diameter of the bar that passes through it. The inner diameter of the spindle needs to be large enough to properly install the bar, but not too large. If the inner diameter of the main shaft is too large compared to the diameter of the bar that passes through it, the spinning operation can cause excessive wear. The gap will leave more room for vibration and whipping of precision machining equipment, which may damage the machine. The result is not only increased early wear, it also means that the bar itself will be damaged. Increase the spindle liner of precision machining equipment. No matter how close the inner diameter of the spindle is to the outer diameter of the bar, there will still be a small gap between them. In order to avoid additional wear, maintain the high performance of the machine and keep the machine in good condition for a long time, the use of spindle lining can help.
When filling the gap between the outer diameter of the bar and the inner diameter of the spindle, polyurethane spindle liners are a very good choice. The spindle liner of precision machining equipment is made of a variety of materials, and steel other than urethane can also be used. These are the two most commonly used spindle pads. When you use a steel spindle liner, you can rely on the hardness of the steel to minimize the accumulation of metal chips, which will reduce the quality of the part.
Polyurethane spindle linings have advantages over steel linings. In fact, steel will always be so hard. This is one of its defining qualities. The problem is that the steel spindle liner cannot sufficiently reduce vibration. Polyurethane spindle lining can provide the durability of steel spindle lining at lower cost. This is just one of the advantages of precision machining equipment. The second significant advantage of polyurethane spindle liners is that they significantly reduce vibration-at least more than steel spindle liners.