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Product details
Marble square ruler is suitable for detecting verticality. The plane accuracy standard GB6092-85 and the verticality standard GB6092-85 have added weight reduction holes to reduce weight and facilitate processing, with a side tolerance of 0.02.
Marble square ruler is made of high-quality "Jinan green" stone material through mechanical processing and manual precision grinding. The marble square ruler has a black luster, precise structure, uniform texture, good stability, high strength, and high hardness. It can maintain high precision under heavy loads and general temperatures. The marble square ruler also has the advantages of non rusting, acid and alkali resistance, wear resistance, non magnetization, and invariance.
Characteristics and advantages of marble square ruler:
1. Rocks undergo long-term natural aging, with uniform organizational structure, extremely low coefficient of linear expansion, complete disappearance of internal stress, and no deformation, resulting in high accuracy.
2. Good rigidity, high hardness, and strong wear resistance.
3. Not afraid of acid and alkali erosion, will not rust, does not need to be oiled, is not easy to stick to dust, easy to maintain, and has a long service life.
4. No scratches, not hindered by constant temperature conditions, and able to maintain temperature measurement accuracy at room temperature.
5. Non magnetized, able to move smoothly during measurement, without any sluggishness, not affected by moisture, and the plane is properly weighed.
Product Specification and Parameter Table
|
Specifications（ mm ） |
Measure the verticality of the foundation facing it |
Measure the flatness or straightness of the surface |
Base plane or straightness |
|||
|
Accuracy level um |
||||||
|
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 |
|
1000×630 |
6 |
12 |
2.5 |
5 |
1.5 |
5 |
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