Granite Surface Plates

Granite surface plates are granite flat plates used for precision inspection, marking out and laying, and tooling. Granite surface plates are graded by AA, A, and B. Plates can also be made of glass, cast iron and granite is preferred due to its ability to provide accuracy even if chipped (unlike iron which warps when damaged). Granite is also totally stable, non-magnetic, has excellent vibration damping characteristics, nor will it corrode or rust. British specification states plates are usually the following sizes; 160 mm x 100 mm to 2500 mm x 1600 mm. Surface plates are used in the manufacturing industry and often seen as a permanent fixture of a robotic inspection device.

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