Granite square rules
Granite square rules
Granite square rules are suitable for testing in industry production and laboratory. In order to be easy to processing and decrease the weight, the lightening holes are added.
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Details
Granite square rules
Granite square rules are suitable for testing in industry production and laboratory. In order to be easy to processing and decrease the weight, the lightening holes are added.
Material: granite
Standard: JB/T 10027-99
Specification: 160x160-500x500mm or customize
Hardness of the working surface: HS70
Surface treatment: ground finish
Precision grade: 00-0
Packaging: wooden box
Technical specification of granite square rule:
|
Specification |
Verticality of two adjacent sides |
Linearity of measuring surface |
Parallel of relative measuring surface |
|||
|
Precision grade (um) |
||||||
|
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 |
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