UNPARALLELED LTD is one of the leading manufacturers and suppliers of granite triangular square in China. With abundant experience, we warmly welcome you to buy advanced granite triangular square made in China here from our factory. We also accept custom orders.
Product Description
Accuracy You Can Trust: The UNPARALLELED® Precision Granite Triangular Square
In the world of ultra-precision engineering, a single degree of error can ruin a thousand parts. That's why leading manufacturers, metrology labs, and aerospace engineers trust UNPARALLELED® - the global benchmark in precision granite components - to deliver the most accurate, stable, and reliable triangular squares available today.
Our Precision Granite Triangular Square isn't just a tool - it's a reference standard. Crafted from our proprietary high-density black granite (≈3100 kg/m³), this angle gauge combines exceptional thermal stability, minimal expansion coefficient, and unmatched resistance to deformation under load - making it ideal for CNC machine setup, CMM calibration, optical alignment, and semiconductor equipment assembly.
We don't sell off-the-shelf tools. We engineer calibrated standards that meet international metrology requirements - because when you're building the future of technology, you need a 90° angle that never drifts.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | UNPARALLELED® Black Granite (Density: ~3100 kg/m³) |
| Surface Finish | Mirror-polished, lapped to nanometer-level flatness |
| Angular Accuracy | ±0.5 arcseconds (±0.00014°) |
| Flatness Accuracy | ±0.5 μm over 100mm length |
| Thermal Expansion Coefficient | < 0.5 × 10⁻⁶ /°C |
| Hardness | Mohs 6–7 (resistant to scratches and abrasion) |
| Available Sizes | Standard: 100mm × 100mm × 100mm; Customizable up to 300mm |
| Mounting Options | Pre-drilled holes, optional leveling feet |
| Certifications | ISO 9001, ISO 14001, ISO 45001, CE, traceable to national standards |
| Calibration | Traceable to NIST, PTB, NPL via Mahr, Mitutoyo, Renishaw instruments |
All units come with full calibration certificates and are tested in our climate-controlled, vibration-free environment.
Key Advantages
- Superior Material Integrity:
Our exclusive black granite exceeds European and American standards in density and stability - no marble substitutes here.
- Nanometer-Level Angular Accuracy:
Achieved through multi-stage grinding and hand-lapping by master craftsmen with over 30 years of experience - some can feel changes down to 1 μm by touch alone.
- Zero Thermal Drift:
With an extremely low coefficient of thermal expansion, the square maintains dimensional accuracy across temperature fluctuations.
- Full Traceability & Certification:
Every unit is calibrated using traceable instruments and comes with detailed certification reports. We also support third-party verification upon request.
- Custom Engineering Capability:
Whether you need a standard size or a custom shape with specific hole patterns, we engineer solutions tailored to your application.
- Industry-Leading Production Capacity:
As the world's fastest producer of precision granite beds, we manufacture 20,000 sets per month using 4 Taiwan NanTec grinding machines ($500K+ each), capable of processing up to 6000mm length.
quality control
Real-World Applications & Benefits
Used in:
✅ CNC machine setup and alignment
✅ Coordinate Measuring Machines (CMM)
✅ Optical lens assembly and calibration
✅ Semiconductor equipment calibration
✅ Aerospace component inspection
✅ Research labs at MIT, Tsinghua, and KTH
Client Benefits:
- Eliminates angular errors in machine setup
- Provides a non-magnetic, non-conductive reference in sensitive environments
- Enhances repeatability in automated inspection systems
- Serves as a primary calibration standard in metrology labs
- Ideal for long-term use due to resistance to wear and degradation
FAQ
Q: Can I customize the size or add more holes?
A: Absolutely. We offer full customization - from small benchtop squares to large industrial-grade blocks - with no minimum order quantity.
Q: How do I maintain my granite triangular square?
A: Clean with distilled water and soft cloth. Avoid abrasive cleaners. Store level and protected from impacts. Regular recalibration is advised every 6–12 months depending on usage.
Q: What makes UNPARALLELED® different from other brands?
A: We're the only manufacturer globally with ISO 9001, 14001, 45001, and CE certifications, plus 20+ international patents. Our in-house R&D team works with universities like NUS, KTH, and Tsinghua to push the limits of precision.
Q: Do you provide calibration certificates?
A: Yes. All units are calibrated using traceable instruments and come with detailed certification reports. We also support on-site calibration services for critical applications.
Q: Is this suitable for outdoor use?
A: While highly durable, we recommend indoor use in controlled environments. Outdoor exposure may lead to moisture absorption and thermal stress over time.
certificates
Why Trust UNPARALLELED®?
Because we believe:
"If you can't measure it, you can't make it."
That's why we invest in state-of-the-art metrology labs, partner with global research institutions, and train every technician in DIN, ASME, JIS, GB, and ISO standards. We don't just sell tools - we deliver confidence.
From GE and Samsung to Singapore's Akribis and Israel's Flex, leaders in technology choose us because they know:
When precision matters, only UNPARALLELED® delivers.
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