Engraving machines are becoming more and more popular, widely used in building industry doors and Windows engraving, heavy machinery industry mold engraving, mold engraving plastic industry and mobile glass panel engraving, milling and grinding. In the past mainly import carving machine, carving machine has also had considerable progress and development. Therefore, carving machine spindle production gradually localization. However, because most of our engraving machine, engraving machine spindle prototype are imported from abroad, the original use of high-speed bearing is also some well-known foreign enterprises, such as bearing production :FAG, SKF, NSK, NTN, GMN and other companies. In the process of localization, the main shaft bearing manufacturers choose is not very proficient in, is often mistakenly choose abuse, cause unnecessary trouble for the end user, as a bearing distributor we now have the necessary in carving machine spindle bearing is the most easy to wrong choice analysis on error theory allows users to choose more efficient and stable high quality bearings.