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RPI re-launch the i72 Angle Reference Standard

星期一, 十一月 14th, 2011

The i72 Angle reference standard is now available to all Laser Interferometer and Autocollimator manufacturers, calibration laboratories, and rotary axis OEM’s
The i72 is a compact high accuracy positioning system for use [...]

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Granite Measuring Tools

With more than 50 years experience in the manufacture of granite measuring tools and surface plates to ISO9001 our granite instruments offer high precision and reliable stability, are wear resistant for a long service life, non corrosive, non magnetic and if it is subject to impact damage will not throw up a burr which can cause measurement errors.

Manufactured from Jinan Black granite consisting mainly of pyroxene, plagioclase, biotite, micromagnetite and a small amount of olivine it offers the following physical properties.

Specific Gravity: 2970 ~ 3070kg/m³
Compressive Strength: 245 ~ 254N/mm²
Elastic Modulus: 1.27 ~ 1.47 x 105N/mm²
Linear Expansion Coefficient:<0.013%
Shore Hardness: Hs70

Granite Inspection Surface Plate