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A surface table is a solid, flat plate used as a flat reference surface for precision measuring and marking out. The surface is usually cast iron or granite and finished incredibly flat to within 250 nano metres (0.00025!)
A surface table is commonly used with a scribing block and an angle plate. The angle plate is used to hold work at 90 degrees to the table so that accurate marks and measurements can be made.
The surface table, angle plate and scribing block can be combined to accurately mark out different parts as shown. below
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