< Measuring and precision tools Granite reference plates
An introduction to granite reference plates
Granite reference plates are an essential tool in mechanical workshops and metrology laboratories. These precision instruments are used to ensure maximum accuracy in measurements and dimensional checks. Thanks to its physical properties, granite is the ideal material for the manufacture of reference plates, offering stability, strength and durability.
Distinctive features of granite
Granite is an intrusive igneous rock, composed mainly of quartz, feldspar and mica. Its crystalline structure gives the material exceptional hardness and strength. These features make it particularly suitable for applications requiring flat, stable surfaces. Furthermore, granite is resistant to corrosion and chemicals, making it ideal for industrial environments.
Use of granite reference plates in mechanical workshops
In mechanical workshops, granite reference plates are used as a reference surface for dimensional checks on mechanical components. Their perfectly flat surface allows for precise measurements, minimising errors. These tools are essential for ensuring the quality of finished products and their compliance with design specifications.
Advantages of granite reference plates
The use of granite reference plates offers numerous advantages. Firstly, their thermal stability reduces dimensional variations caused by temperature changes. Furthermore, granite’s resistance to wear ensures the reference plate has a long service life, maintaining its precision over time. Finally, the ease with which granite can be maintained and cleaned helps to preserve its features in the long term.
How to choose the right granite reference surface
Choosing the most suitable granite reference surface depends on several factors, including the dimensions of the component to be measured, the required accuracy and the working environment. It is also important to consider the surface’s accuracy class, which must be appropriate to the specific requirements of the application. A careful assessment of these aspects will ensure the purchase of an instrument that fully meets operational needs.
Maintenance and care of granite reference plates
To maintain the efficiency and accuracy of granite reference plates, regular maintenance is essential. This includes cleaning the surface with non-abrasive products and periodically checking its flatness. Furthermore, it is advisable to protect the plate from knocks and scratches by using protective covers when not in use.
FAQs on granite reference surfaces
What are the main applications of granite reference plates?
Granite reference plates are mainly used for dimensional inspection and the calibration of measuring instruments.
Why is granite preferred over other materials for reference surfaces?
Granite is preferred for its thermal stability, wear resistance and ability to maintain a flat surface over time.
How is the flatness of a granite reference surface measured?
Planarity is measured using precision instruments such as electronic spirit levels or laser interferometers.
What is the average lifespan of a granite reference surface?
With proper maintenance, a granite reference surface can last for several decades.
Is it possible to repair a damaged granite reference surface?
In some cases, the surface can be re-ground to restore its flatness, but this depends on the extent of the damage.
How do you clean a granite reference surface properly?
We recommend using a soft cloth and a non-abrasive cleaner to remove dust and residue.
What precision grades are available for granite reference surfaces?
The accuracy classes range from 0 to 3, with 0 representing the highest accuracy.
How do you transport a granite reference surface without damaging it?
It is important to use suitable packaging and to handle the surface with appropriate equipment to avoid knocks and scratches.
What are the standard dimensions of granite reference plates?
Dimensions vary widely, from small portable plates to large surfaces for industrial applications.
Do granite reference plates need to be calibrated periodically?
Yes, it is advisable to carry out periodic calibration to ensure the accuracy of measurements.Read More Read Less 
