Granite surface plates are essential tools used for precision measurement and inspection in various industries. These plates are made from high-quality granite, a material known for its durability, high hardness, and stability. Unlike other materials such as cast iron and steel, granite surface plates maintain high precision even under heavy impacts, with only a few chips falling off. They offer superior accuracy and reliability for measuring tools, mechanical components, and instruments.
Applications of Granite Surface Plates
Granite surface plates are used as reference surfaces for measuring and inspecting a variety of equipment and parts. Their high stability and resistance to deformation make them ideal for:
Instrument Calibration: They provide an accurate and stable surface for calibrating measuring instruments.
Tool Inspection: Used to inspect the precision of tools and mechanical parts.
Mechanical Parts Measurement: Especially useful for measuring large mechanical parts that require high precision.
Granite surface plates are particularly suitable for precision measurement tasks due to their high hardness and stability. They are made from natural granite, which has undergone millions of years of natural aging, ensuring that the material remains stable and does not deform due to temperature fluctuations. The granite used for surface plates undergoes strict physical testing to ensure it meets the required standards for high accuracy.
Benefits of Granite Surface Plates
Durability: Granite surface plates are highly resistant to deformation, making them ideal for precision work. They maintain accuracy over time, even after being subjected to heavy loads or impacts.
High Hardness: The material has excellent hardness, ensuring that the surface maintains its flatness and precision even with extended use.
Stability: Granite's physical properties make it highly stable, with low thermal expansion and minimal internal stress, meaning it won't deform under normal temperature changes.
Non-Magnetic: Being a non-metallic material, granite has no magnetic properties, making it suitable for use in environments where magnetism could interfere with measurements.
Corrosion and Wear Resistance: Granite surface plates are resistant to corrosion, rust, and chemical erosion, making them ideal for long-term use without the need for maintenance or oiling.
Easy Maintenance: The surface is easy to clean and maintain, and it remains free from dust and dirt buildup, helping to preserve its precision.
How to Properly Install and Support Granite Surface Plates
Proper installation and support are crucial to maintaining the accuracy of granite surface plates. Incorrect support can lead to warping or deformation. Here's how to install and support the plate correctly:
Place the Plate on a Stable Surface: Ensure the surface plate is placed on a flat, level surface. Adjust the movable feet to achieve stability.
Position the Support Points: Adjust the points of support so that the plate is as close to the center as possible. This will distribute the weight evenly.
Adjust the Feet for Uniform Support: Ensure that the feet are properly adjusted to provide uniform pressure at all points.
Use a Level to Check for Accuracy: After adjusting the support points, use a spirit level to check that the surface plate is perfectly horizontal.
Allow for Settling: After initial adjustments, allow the plate to settle for 12 hours before rechecking and ensuring that the plate remains level.
Regular Maintenance: Periodically check the support points and ensure the plate is still level and undamaged. Keep the surface clean and free from any debris.
Conclusion
Granite surface plates are essential tools for high-precision measurement, offering excellent stability, hardness, and resistance to deformation. They are ideal for use in a variety of industries, providing a reliable and durable surface for tool inspection, instrument calibration, and mechanical part measurement. With proper installation, support, and maintenance, a granite surface plate can provide long-term, accurate performance.