Granite linear rules - RL

linear precision rules in black granite



    Special workings

    Test report





Suitable for high precision testing  of  straightness, checking on guides or scrapped surfaces or as reference, they have a shape studied to give maximum stability. The lapping on one face is carried out in three accuracy grades with tolerances as shown in the table below. They can be supplied with handles on the heads and with wooden case on request. Sides are ground (± 20 µm/m). Microplan® Test Report included. Calibration Certificate available on request*.

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