Ship Model,Industrial Model Makin,Oil Ship Model,Plastic Model Ships To Build Nanjing Great Century Art Model Co., Ltd. , , https://www.dsjysmx.com Our company is a manufacturer specializing in the production of gasoline engines. In the machining process, this phenomenon is often encountered: after the threaded holes of the parts are processed on the machining center, the thread gauges are used to check that the through ends are tight at the orifices. Acceptable. The reason is that the tap is worn after a period of use, causing burrs to form at the orifice during processing. In order to meet the process requirements, new taps must be replaced or burrs added.