The inspection surface plats are basic datum for precision inspection in production department or measure department; the Lineation surface plates are used for basic datum of lineation and marking.
Although they are all basic datum, they are different in processing, flat precision and functions.
The surface of the precision inspection cast iron surface plate need to be ground and scraped, any others need to be ground and scraped or finish-milled and polishing or finish-milling is ok for the Lineation surface plates.
The Inspection surface plates play an important role in checking the workpieces’ linearity and other measuring as auxiliary checking tools. The Lineation surface plates act as basic datum in lineation work.