UNPARALLELED LTD is one of the leading manufacturers and suppliers of precision granite angle plate in China. With abundant experience, we warmly welcome you to buy advanced precision granite angle plate made in China here from our factory. We also accept custom orders.
Product Overview
The UNPARALLELED® Precision Granite Angle Plate is a high-accuracy measuring and inspection tool designed for ultra-precision alignment, squareness checking, and machine setup. Made from premium UNPARALLELED® black granite with a density of approximately 3100 kg/m³, this product offers exceptional dimensional stability, rigidity, and wear resistance-superior to typical European black granites and far beyond the performance of marble substitutes.
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Specification model |
Squareness between measuring surface and |
Flatness&straightness of measuring surface |
Flatness& straightness of datum surface |
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|
Precision Grade(μm) |
||||||
|
00 |
0 |
00 |
0 |
00 |
0 |
|
|
160*100 |
2 |
4 |
1 |
2 |
1 |
1 |
|
250*160 |
2.5 |
5 |
1 |
2 |
1 |
2 |
|
300*200 |
2.5 |
5 |
1 |
2 |
1 |
2 |
|
400*250 |
3.5 |
7 |
1.2 |
2.5 |
1 |
2 |
|
500*315 |
3.5 |
7 |
1.5 |
3 |
1 |
2 |
|
630*400 |
4.5 |
9 |
1.5 |
3 |
1.2 |
2.5 |
|
1000*630 |
6 |
12 |
2.5 |
5 |
1.5 |
3 |
|
... |
... |
... |
... |
... |
... |
... |
If need custom High Precision granite tri square ruler, please contact: info@unparalleled-group.com
quality control
Key Features and Advantages
- High Stability and Rigidity: The fine-grained, high-density UNPARALLELED® black granite ensures long-term dimensional accuracy and resistance to deformation.
- Thermal and Corrosion Resistance: Low thermal expansion and zero rusting guarantee consistent precision under changing environments.
- Superior Surface Finish: Each working surface is hand-lapped by experienced craftsmen with over 30 years of experience, achieving flatness within 1 μm for high-precision applications.
- Non-Magnetic and Non-Conductive: Ideal for environments where magnetic interference must be avoided, such as semiconductor or optical assembly lines.
- International Standards Compliance: Manufactured and inspected according to DIN 875, GB, JIS, and ASME standards. Each plate comes with calibration certificates traceable to national metrology institutes.
factory display
Applications
UNPARALLELED® Precision granite angle plates are widely used as precision reference surfaces for:
- Coordinate measuring machines (CMM)
- Precision assembly fixtures
- Laser alignment systems
- Optical measurement equipment
- Semiconductor production lines
- High-precision CNC machines and calibration laboratories
Quality and Metrology Assurance
Every precision granite angle plate is measured using Renishaw laser interferometers, Mitutoyo digital indicators, and Wyler electronic levels, ensuring traceability and conformance to international standards. Our metrology laboratory operates under constant temperature and humidity control, guaranteeing repeatable accuracy in every inspection.
services
Maintenance and Care
To maintain long-term accuracy:
- Keep the granite surface clean and free from dust, oil, and coolant residue.
- Use a soft, lint-free cloth and neutral cleaner for daily maintenance.
- Avoid direct impact or loading heavy metal parts on the reference surfaces.
- Store the plate in a controlled environment, preferably within a temperature range of 20 ± 1 °C and humidity of 50 ± 10%.
- Periodically recalibrate the plate using certified reference instruments to ensure lasting precision.
certificates
Why Choose UNPARALLELED®
As a global leader in precision granite manufacturing, UNPARALLELED Group is the only company in this industry certified by ISO9001, ISO45001, ISO14001, and CE. Our products are trusted by top global enterprises such as GE, Bosch, Samsung, and leading metrology institutes worldwide. With over 20 international trademarks and patents, UNPARALLELED® has become the benchmark of excellence in the precision measurement industry.
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