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Home >> Products >> Cast lron square block
Square block (as per GB7-62) is an important auxiliary tool in the plate measurement. It is used for inspecting and measuring the tridimensional lineation by fitters, the parallelism and verticality of machining parts, as well as various location differences.
| Type (mm) |
Parallelism of working
surface |
Flatness of working
surface |
Perpendicularity of
working surface |
| Precision grade (μm) |
| 1 |
2 |
1 |
2 |
1 |
2 |
| 100 × 100 × 100 |
2 |
4 |
2 |
4 |
2 |
4 |
| 150 × 150 × 150 |
3 |
6 |
3 |
6 |
3 |
6 |
| 200 × 200 × 200 |
4 |
8 |
2.5 |
4 |
4 |
8 |
| 300 × 300 × 300 |
6 |
12 |
2.5 |
4 |
6 |
12 |
| 400 × 400 × 400 |
8 |
16 |
4 |
8 |
8 |
16 |
| 500 × 500 × 500 |
20 |
40 |
5 |
12 |
20 |
40 |
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