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 straight ruler is mainly used to test the flatness and straightness of machine tool workbench, guide rail and precision workbench etc.
4. Main parameter:
Specification(mm) |
Straightness or flatness of working surface |
Parallelism between working surface |
||
Precision Grade(μm) |
||||
00 |
0 |
00 |
0 |
|
500×100×40 |
1.6 |
2.6 |
2.4 |
3.9 |
750×100×40 |
2.1 |
3.5 |
3.2 |
5.3 |
1000×120×40 |
3.0 |
5.0 |
4.5 |
7.5 |
1500×150×60 |
4.4 |
7.4 |
6.6 |
11.1 |
2000×200×80 |
5.4 |
10.0 |
8.1 |
13.5 |
3000×200×80 |
8 |
16 |
12 |
24 |
We could manufacture the special dimension by your request. |