A CMM is a bridge-style measuring system that probes the geometry of objects along X, Y, and Z axes using an optical system or touch-trigger. The materials used in CMM construction typically require high specific stiffness and good thermal properties to enable thermally dynamic testing and measurement. Historically, the best materials have been a combination of aluminum, granite, and steel. However, when sub-micron accuracy is required, these traditional materials are not adequate.
At Saint-Gobain Performance Ceramics & Refractories, we deliver MM solutions based on precision silicon carbide (SiC). With a specific stiffness of 86 – 132, our silicon carbide products far exceed the performance of conventional industrial metrology materials by a minimum factor of 25%. This comes courtesy of significant weight savings too.
We engineer silicon carbide beams, bridges, guide rails, and more for CMM assemblies. With low thermal expansion of less than 50% that of aluminum, and exceptionally high thermal stability, silicon carbide represents an enormous step-up in terms of metrological performance.