#surface plate

Granite Surface Plates from grade 0 to grade 3.

Surface Plates are flat and plane surface used as a horizontal reference space for dimensional measurement, it’s a base for inspection, toolmaking, gauging, spotting, marking, and layout. They can be made from granite, metal, cast iron, or glass. As far as use is concerned, surface plates must be calibrated on a regular basis, at least once to twice a year, but most efficiently and for long-lasting use, it is to be calibrated every six months. To Read more visit here: https://www.jashmetrology.com/what-is-surface-plate-uses-of-surface-plate/

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First, it is important to keep the plate clean. Airborne abrasive dust is usually the greatest source of wear and tear on a plate, as it tends to embed in work pieces and the contact surfaces of gages. Second, cover your plate to protect it from dust and damage. Wear life can be extended by covering the plate when not in use, by rotating the plate periodically so that a single area does not receive excessive use, and by replacing steel contact pads on gauging with carbide pads. Also, avoid setting food or soft drinks on the plate. Note that many soft drinks contain either carbonic or phosphoric acid, which can dissolve the softer minerals and leave small pits in the surface.

When the bearing mill working on a machine body 

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