Made of aluminum oxide ceramic, this Master Square is comparatively lightweight and easily loads into machine tools. The advanced ceramic material is harder than granite or steel, which significantly reduces wear on the Master Square surface. The non-porous ceramic is useful in facilities with high humidity and/or high temperatures because it eliminates moisture absorption and corrosion that can cause dimensional instability.
Because the thermal expansion coefficient in ceramic is low, measurements are consistently accurate. The Master Square is finished and calibrated to required Flatness, Squareness, and Parallelism with documented traceability to NIST (National Institute of Standards and Technology).
The Electronic Gage, when used with a Master Square, provides a means of measuring the Alignment of Axes of Motion in accordance with the latest ISO 230-1 Test code for machine tools. This code requires the determination of Reference straight lines for the trajectories of the Motion axes from multiple points using the least-squares fit method.
Note: Additional Ceramic Master Squares, Ceramic Parallels, Ceramic Surface Plates, & Ceramic Straight Edges are also available in specified grades and sizes.