UNPARALLELED LTD is one of the leading manufacturers and suppliers of precision measurement tools in China. With abundant experience, we warmly welcome you to buy advanced precision measurement tools made in China here from our factory. We also accept custom orders.
In the world of high-precision engineering, accuracy isn't just a goal - it's a non-negotiable standard. Whether you're calibrating CMMs, aligning semiconductor lithography stages, or inspecting aerospace components, your reference surface must be as stable as the laws of physics allow. That's where our Precision Granite Surface Plate comes in - engineered not just to meet specifications, but to redefine what "precision" means in real-world applications.
Crafted from premium black granite with a density exceeding 3100 kg/m³, this plate is more than a measuring tool - it's the silent guardian of your quality control process. Its naturally non-magnetic, corrosion-resistant, and thermally stable structure ensures that even under fluctuating workshop conditions, your measurements remain true. And because we know that "flatness" is only as good as the environment it's measured in, every plate undergoes rigorous inspection in temperature-controlled facilities using laser interferometers and electronic levels traceable to international standards.
Why This Isn't Just Another Granite Plate - It's Your Competitive Edge
Let's be honest: not all granite plates are created equal. Some suppliers cut corners by using lower-density stone or skipping post-machining stabilization. We don't. Here's what sets ours apart:
- True 00-Class Flatness: Achieved through multi-stage hand-scraping and verified with sub-micron interferometry - not just "close enough."
- Zero Magnetic Interference: Ideal for sensitive electronics and optical systems where ferrous materials can distort readings.
- Thermal Stability You Can Trust: Minimal coefficient of thermal expansion means your plate won't warp when the lab AC kicks on or off.
- Built to Last Decades: Resists scratching, staining, and chemical degradation - even in harsh industrial environments.
- Customizable Dimensions & Mounting: Need threaded inserts, T-slots, or special edge finishes? We tailor it to your workflow.
quality control
Technical Specifications at a Glance
| Parameter | Specification |
|---|---|
| Material | High-Density Black Granite (≥3100 kg/m³) |
| Accuracy Grade | DIN 876 / JIS B 7513 Class 00 |
| Surface Finish | Ra ≤ 0.8 µm (mirror-polished) |
| Thermal Expansion Coeff. | ≤ 6.5 × 10⁻⁶ /°C |
| Magnetic Permeability | Non-Magnetic |
| Standard Sizes | 300×300mm to 2000×1000mm (custom available) |
| Weight Range | 25kg – 1000kg+ |
| Certification | ISO 9001 + Traceable Calibration Report |
Real-World Impact: Where Our Plates Make the Difference
Imagine setting up a new optical inspection line for perovskite solar cells. A single micron of deviation could mean rejecting an entire batch. Or picture assembling a femtosecond laser system - where vibration damping and thermal stability directly affect pulse alignment. In these scenarios, our granite plate isn't just supporting equipment; it's enabling breakthroughs.
Engineers across industries rely on us because they know:
"When I place my probe on this surface, I'm not guessing - I'm measuring against truth."
That's the confidence our customers get - whether they're in automotive R&D, medical device manufacturing, or national metrology labs.
services
FAQ
Q: How do you ensure long-term flatness after delivery?
A: Every plate is stress-relieved during machining and re-checked post-delivery. We also provide storage and handling guidelines to preserve accuracy over decades.
Q: Can you match specific international standards like ASME B89.3.7?
A: Absolutely. We certify to DIN, JIS, ASME, and custom protocols upon request - including full calibration reports with uncertainty budgets.
Q: What if I need a non-standard size or shape?
A: Custom fabrication is one of our core strengths. From L-shaped bases to integrated mounting features, we build exactly what your application demands.
Q: Is there a warranty or service plan?
A: Yes - all plates come with a 5-year structural integrity guarantee and optional annual recalibration services.
certificates
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