Granite surface plates are crafted from high-quality natural granite and precisely finished through a combination of machine processing and manual lapping. These plates serve as reliable reference bases for precision inspection. Thanks to their natural advantages, granite plates significantly outperform traditional cast iron surface plates in both accuracy and longevity.
Key advantages include:
High Surface Hardness & Smooth Finish
The fine-grained structure of granite ensures excellent surface smoothness, high wear resistance, and minimal roughness-ideal for long-term usage.
Superior Dimensional Stability
Granite undergoes natural aging over millions of years, which eliminates internal stress. As a result, it maintains exceptional shape and flatness without warping over time.
Resistant to Chemicals & Magnetism
Granite is naturally resistant to acids, alkalis, corrosion, and magnetic interference, making it suitable for sensitive measuring environments.
Rust-Free & Easy Maintenance
Unlike metal plates, granite does not absorb moisture or rust, offering a clean, hassle-free working surface that requires minimal upkeep.
Low Thermal Expansion
With a low coefficient of thermal expansion, granite plates remain stable even under temperature variations, ensuring measurement accuracy.
Impact Tolerance Without Burr Formation
If the working surface is scratched or bumped, granite may develop small dents but will not form raised edges or burrs, preventing measurement distortion.
Thanks to these unique physical and mechanical properties, granite inspection plates are the preferred choice in precision industries where stability, accuracy, and durability are essential.