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Granite Rectangular Devices

The moorstone right angle rule is mainly used for detecting planenesss, verticality and linearity of workpieces. The moorstone right angle rule is mainly made of the minerals such as Taoshi stone, p
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Granite Rectangular Devices

 

  The moorstone right angle rule is mainly used for detecting planenesss, verticality and linearity of workpieces. The moorstone right angle rule is mainly made of the minerals such as Taoshi stone, plagioclase, olivine in small quantity, biotite and magnetite in trace quantity. It has black color and compact structure. After hundreds of millions of years of aging, the moorstone has uniform texture, high stability, high strength and high hardness and can keep high precision under heavy load. The moorstone right angle rule is applied to the measurement of industrial production and labs.
  Features and Advantages of Moorstone Right Angle Rule:
  With long-time natural ageing, rocks have uniform organizational structure, extremely low linear expansion coefficient and completely disappeared internal stress and are not deformed, so that the moorstone platform is high in precision;
  High rigidity, high hardness and high wear resistance;
  Acid resistant, alkaline solution resistant, anti-rusty performance, unnecessary oil applying, difficult adhesion of fine dust, convenient maintenance and repairing and long service life;
  No scratches, not limitation of the constant temperature condition, and high measuring precision at normal temperature;
  No magnetization, smooth movement during measurement, insusceptibility to dampness, and good plane weighing property.
 
Specification(mm)
Vertical face of the base surface measurement(um)
Measuring surface flatness or straightness(um)
Base surface flatness or straightness(um)
Precision Level
00
0
00
0
00
0
100×63
2
4
1
1
1
1
160×100
2
4
1
2
1
1
250×160
2.5
5
1
2
1
2
400×250
3.5
7
1
2.5
1
2
630×400
4.5
9
1.5
3
1
2.5
800×500
5
10
2
4
1.2
3
1000×630
6
12
2.5
5
1.5
3
 
Granite Rectangular Devices
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