UNPARALLELED LTD is one of the leading manufacturers and suppliers of granite inspection plate in China. With abundant experience, we warmly welcome you to buy advanced granite inspection plate made in China here from our factory. We also accept custom orders.
Black granite surface plates are manufactured in high accuracy according to following standards, with the addiction of higher precision grades in order to satisfy all specific user needs, both in workshop or in metrological room.
Nature granite is synonymous with unshakable strength, measuring equipment made of granite is synonymous with the highest levels of precision. Even after more than 60 years of experience with this material, it gives us new reasons to be fascinated every day.
Our quality promise: UNPARALLELED measuring tools and components for special machine construction meet the highest standards for dimensional accuracy and precision.
The UNPARALLELED product range includes:
Standard measuring equipment such as measuring plates and accessories, measuring and gauge stands, measuring devices, precision bench centers etc.
Custom-made bases made of natural granite for special purpose engineering, e.g. for laser machining, the manufacture of circuit boards and semiconductors, as well as for 3D coordinate measuring machines.
Contract manufacturing for the grinding, drilling and lapping of workpieces made of natural granite, mineral casting, technical ceramics and cast iron.
Assembly of linear guides for special constructions.
We deliver to customers worldwide, from industrial tool distributors to manufacturing industries in a variety of sectors. We also cooperate with technical universities and various research institutes.
All UNPARALLELED® plates are supplied with a Test Report, in which error map and installation instructions are reported.
Calibration Certificate available on request*.
The table shows standard sizes, weights, article codes and the absolute flatness tolerances (in micrometers).
UNPARALLELED® can supply plates with different sizes according to customer needs and drawings, with holes, threaded inserts, guide or clamping T-slots, clearing grooves and with rubber feet (for the smaller sizes).
|
Size(mm) |
Precision Grade (μm) GB Standard |
Net Weight (kgs) |
|||
|
Grade 000 |
Grade 00 |
Grade 0 |
Grade 1 |
||
|
300x200x50 |
0.9 |
1.8 |
3.6 |
7 |
9 |
|
300x300x70 |
1 |
1.9 |
3.8 |
7.5 |
19 |
|
400x250x70 |
1 |
2 |
4 |
8 |
21 |
|
400x400x70 |
1.2 |
2.3 |
4.5 |
9 |
34 |
|
630x400x100 |
1.3 |
2.5 |
5 |
10 |
77 |
|
630x630x100 |
1.3 |
2.5 |
5 |
10 |
121 |
|
800x500x100 |
1.4 |
2.7 |
5.3 |
11 |
159 |
|
900x600x100 |
1.5 |
2.9 |
5.7 |
11.5 |
215 |
|
1000x630x150 |
1.5 |
3 |
6 |
12 |
290 |
|
1000x750x150 |
1.6 |
3.2 |
6.3 |
12.5 |
345 |
|
1000x1000x150 |
1.8 |
3.5 |
7 |
14 |
460 |
|
1600x1000x200 |
2 |
4 |
8 |
16 |
982 |
|
1600x1600x200 |
2.4 |
4.8 |
9.5 |
19 |
1572 |
|
2000x1000x200 |
2.4 |
4.8 |
9.5 |
19 |
1228 |
|
2000x1600x250 |
2.5 |
5 |
10 |
20 |
2456 |
|
2500x1600x300 |
2.9 |
5.8 |
11.5 |
23 |
3684 |
|
3000x2000x400 |
3.3 |
6.5 |
13 |
27 |
7368 |
|
4000x2000x500 |
4 |
8 |
16 |
32 |
12280 |
|
4000x2500x500 |
4.4 |
8.8 |
17.5 |
35 |
15350 |
|
... |
... |
... |
... |
... |
... |
There are many kinds of granite surface plates such as rectangle granite surface plate, granite surface with slots and round granite surface plate.
We can manufacture custom granite surface plates with high precision(μm grade).
10000MM X 3000MM Granite Inspection Plate
10000MM X 3000MM Granite Inspection Plate
Flatness Standards
|
Nations |
Standard series |
Flatness |
||||||
|
Calculation formula |
Grade |
|||||||
|
000 (AA) |
00 (A) |
0 (B) |
1 |
2 |
3 |
|||
|
Coefficient K |
||||||||
|
Germany |
DIN876-1972 |
K(1+a/1000) |
|
2 |
4 |
10 |
20 |
40 |
|
China |
GB/T 20428-2006 |
K (1+d/1000) |
1 |
2 |
4 |
8 |
16 |
40 |
|
USA |
GGGP-463C-78 |
K(1+1.6d*d/106) |
1 |
2 |
4 |
|
|
|
|
Japan |
JISB7513-78 |
K*d/100 |
|
|
0.5 |
1 |
2 |
|
|
UK |
BS817-1983 |
K(1+D/1000) |
|
2.5 |
5 |
10 |
20 |
|
|
France |
EIE101-77 |
K(1+d/1000) |
1.25 |
2.5 |
5 |
10 |
20 |
40 |
|
Russia |
TOCT10905-1975 |
K(1+a/500) |
|
2 |
3.2 |
5 |
12 |
20 |
|
Remark: A--- length of long side d--- Diagonal length Blank means no such specification |
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