Granite Precision Stage & Granite Inspection Table & Granite Machinery Parts-MORN Granite
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Products
Granite Square Ruler

1. Material: Jinan Black

    Specific Gravity: 3.07g/m3

    Compressive Strength: 257MPa

    Elastic Modulus: 1.37GPa

    Linear Expansion Coefficient: 4.61x10-6/℃

    Water Absorptivity: 0.12%

    Shore Hardness: 79.9

2. Features: High-Precision, no rust, acid and alkali-resistant, no magnetized, no deform, good abrasion resistance etc.

3. Applicable area: The granite square ruler is mainly used to test the verticality and parallelism of the parts in industrial production and laboratory etc. The implementation standard of surface precision and verticality is GB6092-85.

4. Main parameter:

Specification(mm)

Verticality between

 two measuring surface

Straightness of 

measuring surface

Parallelism between

relative measuring surface

Precision Grade(μm)

00

0

00

0

00

0

160×160

2

4

0.8

1.7

2

4

200×200

2

4

0.9

1.8

2

4

250×250

2.2

4.5

1

2

2.2

4.5

315×315

2.6

5.2

1.1

2.3

2.6

5.5

400×400

3

6

1.3

2.6

3

6

500×500

3.5

7

1.5

3

3.5

7

We can produce with your special request.

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