The Cast iron surface plates can regain the precision grade though re-scraped after little wear and tear,
The Cast iron surface plates can check the planeness by coloring method; it is accurate, intuitive and convenient. It is very easy and smoothly to push the gauge stand or workpieces on their surface, we can get the accurate result and it is very convenient for us to test.
The quality of the cast iron raw material and heat-treatment influence the capacity of cast iron surface plate greatly. The working surface couldn’t keep their shape if the innerstress exists; the precision grade could not be sure because of wear and tear; or we couldn’t get a minimum roughness because it’s hard to scrape and grind. So when you choose the Cast iron surface plates, please pay more attention to the cast iron raw materials and how to clear the residual innerstress.