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 is mainly used to test the flatness, verticality and straightness of the machinery parts and it also can be used for angle measurement of machinery parts, machine tool principal axis etc.
4. Main parameter:
Specification(mm)
Verticality between measuring and standard surface
Flatness or straightness of measuring surface
Flatness or straightness of standard surface
Precision Grade(μm)
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
We can produce with your special request.