The lower compression platen of the testing machine is marked with a serie of concentric circles to facilitate the correct centering of the specimens. For cubes 100 and 150 mm side and cylinders dia.100 and 150 mm. Auto-Centering Device, to be used with compression machine having platen dia. 287 mm. However to grant a rapid and accurate centering of concrete cube and cylinder specimens, this Auto-Centering device is recommended.
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