Product Info

A Stone Surface Plate, also known as a granite surface plate, is a precision measuring tool used for inspecting the flatness and accuracy of workpieces or other measuring instruments. It is made from high-strength granite, which resists deformation, wear, and corrosion, making it ideal for applications that require high precision.

■ Characteristics of a Stone Surface Plate
1. High Flatness – Capable of maintaining surface flatness within micrometer (µm) levels, essential for precise measurement tasks.
2. Rust-Free – Made from granite, it does not rust like metal surface plates.
3. Scratch and Wear Resistance – Granite is highly durable and wears out less compared to steel or other metal plates.
4. Minimal Thermal Expansion – Granite has a low thermal expansion coefficient, ensuring dimensional stability even in fluctuating temperatures.
5. Reduced Friction and No Static Electricity – Granite is non-magnetic, does not generate static electricity, and reduces friction between the workpiece and the surface.

■ Applications of a Stone Surface Plate
1. Base for Workpiece Measurement – Used as a reference surface for measuring the dimensions, flatness, or angles of a workpiece with instruments like dial gauges or height gauges.
2. Surface Flatness Inspection – Used to check the flatness of a surface with tools such as straight edges or autocollimators.
3. Support Base for Measuring Instruments – Can serve as a stable base for coordinate measuring machines (CMMs) or other precision measuring tools.
4. Assembly and Workpiece Setup – Commonly used in mechanical and manufacturing industries for setting up and aligning equipment that requires high precision.

■ Maintenance of a Stone Surface Plate
- Regular Cleaning – Wipe the surface with a clean cloth to remove dust and contaminants before use.
- Avoid Impacts or Scratches – Prevent damage that may reduce accuracy.
- Store in a Stable Temperature Environment – To minimize thermal expansion effects.
- Periodic Calibration and Inspection – Ensures long-term accuracy and reliability.