MEASURING INSTRUMENTS CATALOG No.E2021
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E-49EMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.Reference GagesLength Standards Brought to You by MitutoyoAn inspection certicate is supplied as standard. Refer to page U-9 for details.• Natural granite is free from deterioration or dimensional change over time.• Black Granite Plate’s most distinctive feature is its hardness, twice that of cast iron.• Free from wringing effects, so there is no interruption of work.• Since granite is harder, ner grained, and more brittle than cast iron it does not throw up burrs or protrusions if scratched. (See Figure 1.) This ensures a high degree of atness with no risk of damaging instruments or workpieces.• Use these plates in a stable temperature environment. Since atness error occurs when there is a temperature difference between the working surface and the underside, avoid working in direct sunlight. Also, do not place a plate in the vicinity of an air conditioner or heater. (Recommended environment: Temperature 20±1 °C, Humidity 58±2%)Black Granite Surface PlatesSERIES 517Machining of optional through holes, screw bushings, etc.Through holes and screw holes (bushings) can be machined to order on surface plates. For detailed information, contact the nearest Mitutoyo sales ofce.1000×750 mm600×600 mmCast iron surface plateGranite surface plateFigure 1

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