UNPARALLELED LTD is one of the leading manufacturers and suppliers of precision granite bridge structure in China. With abundant experience, we warmly welcome you to buy advanced precision granite bridge structure made in China here from our factory. We also accept custom orders.
Product Overview
The Bedrock of Nanometer Precision
In the world of ultra-precision engineering, stability isn't just a feature-it's the foundation. The component pictured above is a custom-machined precision granite bridge structure, designed specifically for applications where thermal stability and vibration damping are non-negotiable.
Unlike cast iron or steel, which suffer from thermal expansion and internal stress relief over time, our granite components offer a "set and forget" reliability. This specific bridge design features a massive, rigid base supporting a vertical gantry frame, optimized for mounting linear scales, laser interferometers, or scanning probes. Whether you are building a next-generation CMM (Coordinate Measuring Machine) or a semiconductor wafer inspection system, this base ensures your data remains true, regardless of environmental fluctuations.
Why Choose Precision Granite Over Metal?
- Superior Thermal Stability: With a coefficient of thermal expansion roughly 1/3 that of cast iron, this granite base minimizes dimensional changes caused by temperature shifts, ensuring consistent accuracy in varying workshop environments.
- Exceptional Vibration Damping: The natural mineral structure of granite absorbs vibrational energy 6x better than steel. This results in smoother surface finishes during machining and noise-free data acquisition during measurement.
- Non-Magnetic & Corrosion Resistant: Ideal for sensitive electronic environments (like semiconductor fabs) where magnetic interference is a risk. It is also impervious to humidity and coolants, requiring zero maintenance against rust.
- High Rigidity-to-Weight Ratio: Despite its mass, the material allows for complex geometries (like the hollowed sections seen in the image) that maintain stiffness while managing weight distribution.
- Dimensional Permanence: Once stress-relieved and precision-ground, granite does not age or warp like metal, guaranteeing the longevity of your equipment's accuracy.
quality control
Technical Specifications
| Feature | Specification / Detail |
|---|---|
| Material Grade | Premium Natural Black Granite (G654/Jinan Green equivalent) |
| Density | ≥ 3050 kg/m³ (High density for maximum inertia) |
| Flatness Accuracy | Up to DIN 876 Grade 00 (Customizable to < 3μm) |
| Surface Finish | Fine Ground / Polished (Ra 0.4 - 0.8 μm) |
| Thermal Expansion | ~6 - 8 x 10⁻⁶ /°C (Extremely low) |
| Magnetism | Non-magnetic |
| Customization | Full CNC machining of holes, threads, and grooves available |
| Application | CMMs, Lithography stages, Optical inspection, Laser bases |
services
FAQ
Q: Can you manufacture this granite base to our specific CAD drawings?
A: Absolutely. We specialize in custom OEM/ODM manufacturing. Send us your STEP or IGES files, and we can replicate exact dimensions, hole patterns, and tolerance requirements.
Q: How do you ensure the granite doesn't crack during shipping?
A: We use specialized wooden crate packaging with high-density foam cushioning tailored to the component's geometry. We also perform strict impact testing to ensure safe global delivery.
Q: What is the lead time for a custom granite structure like this?
A: Standard prototyping usually takes 3-4 weeks, depending on complexity. Mass production timelines are discussed upon quotation.
Q: Do you provide certification for flatness and parallelism?
A: Yes. Every critical surface is inspected using laser interferometers or electronic levels, and a detailed inspection report is included with the shipment.
certificates
Ready to Stabilize Your Equipment?
Don't let thermal drift or vibration compromise your product quality. Partner with UNPARALLELED Group for granite components that define industry standards.
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