Calibration-Grade Granite Surface Plate for Metrology Use

The granite surface plate is a precision reference measuring tool made from natural granite, designed for use in inspection, calibration, and layout work involving instruments, precision tools, and mechanical components. With excellent dimensional stability and wear resistance, it is widely used in quality control and metrology environments. Compared to cast iron plates, granite plates offer superior performance for high-precision applications.

Key Features and Advantages:

1. Stable Accuracy & Easy Maintenance
   Dense structure, smooth surface, excellent wear resistance, and low surface roughness ensure long-term accuracy and minimal maintenance.

2. Naturally Aged & Stress-Free Material
   Formed over millions of years, the granite has naturally released internal stresses, resulting in high material stability and no deformation over time.

3. Resistant to Corrosion, Acids, and Magnetism
   Granite is non-magnetic and highly resistant to chemical corrosion, making it suitable for demanding working environments.

4. Rust-Free and Moisture Resistant
   Unlike cast iron, granite does not rust or require special anti-corrosion treatments. It is easy to clean and maintain in humid conditions.

5. Low Thermal Expansion
   The linear expansion coefficient is low, which minimizes the effect of temperature changes on measurement results.

6. Durable Against Damage
   When impacted or scratched, only small pits form instead of burrs or raised edges, preserving the measurement surface integrity.