Granite Square Ruler
It is made by Jinan Black Granite (density: 3070kg/m3) with four precision surfaces, which is suitable for measuring in CNC, LASER Machines assembly and inspection& calibration in laboratories.

Application

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Characteristics


1.After long-term natural aging, the internal stress disappears completely without deformation, so the accuracy is high.

2. It is not afraid of acid and lye; it will not rust, no need to be oiled, and it is not easy to stick to dust; it is convenient and simple to maintain and has a long service life.

3. There will be no scratches, and the accuracy of temperature measurement can be maintained at room temperature.

4. It is not magnetized, can move smoothly during measurement, has no sense of stagnation, and is not affected by moisture.


Technical Parameters


TYPE(mm)Squareness between abjacent measuring surfacesStraightness of measuring surfaceParallelism between opposite measuring surface
Precision grade
000000000
150*1501.83.50.81.61.83.5
160x160240.81.724
200x200240.91.824
250x2502.24.5122.24.5
315x3152.65.21.12.32.65.5
400x400361.32.636
500x5003.571.533.57


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