UNPARALLELED LTD is one of the leading manufacturers and suppliers of custom precision granite bases in China. With abundant experience, we warmly welcome you to buy advanced custom precision granite bases made in China here from our factory. We also accept custom orders.
Product Detail
"Precision cannot be compromised. If you cannot measure it, you cannot build it."
In ultra-precision industries like semiconductor manufacturing, AOI optical inspection, and picosecond laser processing, micro-vibrations and thermal expansion are the ultimate enemies of accuracy. Metal frames warp, cast iron suffers from internal stress relaxation over time, and inferior marble lacks structural density.
At UNPARALLELED®, we start with nature's most stable material: proprietary UNPARALLELED® Black Granite with a extraordinary density of ~3100 kg/m³. Engineered with monolithic strength and hand-lapped by master craftsmen with over 30 years of metrology experience, our custom granite machine bases deliver absolute dimensional stability, superior vibration damping, and zero residual stress.
Whether you need a 100-kg mounting stage or a 100-ton custom granite gantry structure, we turn raw stone into the ultimate foundation for world-class machine builders.
Technical Specifications
| Parameter / Feature | UNPARALLELED® Specification | Industry Benchmark / Comparison |
| Material Type | Selected UNPARALLELED® Black Granite | Standard Black Granite / Marble |
| Material Density | ≈ 3100 kg/m³ | ~2600 - 2800 kg/m³ (Marble/Lower Grade Granite) |
| Compressive Strength | > 245 - 300 MPa | High load capacity without deformation |
| Thermal Expansion Coeff. | 4.5 – 5.5 × 10⁻⁶ / °C | Extremely low thermal drift |
| Flatness / Accuracy Class | Up to Sub-Micron / Nanometer Level | DIN 876 Grade 00, 0, 1 / ASME GGGP-463C |
| Max. Single Component Size | 20,000 mm (L) × 4000 mm (W) × 1000 mm (H) | Industry-leading single-piece limit |
| Max. Load Capacity | Up to 100 Tons (Single Component) | Handles heavy gantry & high-acceleration stages |
| Machining Options | T-Slots, Inserted Bushings, Clearance Holes, Air-Bearing Surfaces, Precision Grooves | Custom CNC Machined per CAD drawings |
| Calibration Traceability | Calibrated via Mahr, Wymer & Renishaw Laser Systems | Traceable to National Metrology Institutes |
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Key Advantages
- Superior Density & Physical Performance: Our black granite outperforms standard European and American stones. Its ultra-fine mineral structure delivers higher hardness, lower porosity, and exceptional resistance to acid, alkali, and corrosion-never rusts, never magnetic.
- 10,000 m² Climate-Controlled Manufacturing: Produced inside state-of-the-art Constant Temperature & Humidity (CTH) cleanrooms built on 1,000mm-thick military-grade reinforced concrete, isolated with 500mm-wide × 2000mm-deep anti-vibration trenches.
- 30+ Years Master Craftsmanship: While advanced CNC grinders handle rough geometry, our final surface flatness is achieved through hand-lapping by master artisans capable of feeling micron-level tolerances with their hands.
- Integrated Threaded Inserts & Steel Slots: Advanced epoxying and mechanical anchoring techniques ensure stainless steel inserts and T-slots withstand high pulling torque without delamination or stress cracking.
- Fully Certified & Traceable Quality: The only manufacturer in the segment holding ISO 9001, ISO 45001, ISO 14001, and CE certifications simultaneously, with over 20 international patents across the US, EU, and Southeast Asia.
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Real-World Applications
Our custom granite machine bases serve as the core structural foundation across mission-critical industries:
Semiconductor Equipment: Wafer inspection tools, lithography stages, wire bonders, and dicing machines.
Optical & Measuring Systems: Automated Optical Inspection (AOI), Coordinate Measuring Machines (CMM), X-ray CT systems, and 2D vision measuring systems.
Ultra-Precision Laser & CNC: Femtosecond/picosecond laser equipment, PCB drilling platforms, XY motion tables, and linear motor bases.
Emerging Tech Platforms: Perovskite coating machines and EV lithium battery testing rigs.
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FAQ
Q1: Why should we choose UNPARALLELED® Black Granite over traditional cast iron or epoxy mineral casting?
A: Cast iron is prone to residual internal stress, thermal expansion, and rust over time, requiring constant re-calibration. Epoxy/mineral castings offer good damping but struggle to maintain long-term nanometer-level dimensional accuracy. UNPARALLELED® Black Granite (~3100 kg/m³) is naturally stress-relieved over millions of years, providing superior thermal inertia, zero magnetic interference, and permanent shape retention.
Q2: Can UNPARALLELED® accommodate complex CAD drawings with custom threaded inserts and air bearings?
A: Yes. We specialize in bespoke OEM/ODM manufacturing. Our engineering team routinely processes complex STEP/IGES CAD files, integrating hundreds of high-precision inserts, vacuum grooves, air-bearing guide surfaces, and cable runs to your exact specifications.
Q3: How do you guarantee accuracy for large-scale components during shipping and temperature fluctuations?
A: Every base is inspected in our 10,000m² temperature-controlled cleanroom using Renishaw laser interferometers and WYLER electronic levels. Calibration reports are traceable to National Metrology Institutes. For shipping, components are packed in custom vacuum-sealed, shock-absorbing export wooden crates to preserve micron-level tolerances upon arrival at your plant.
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Build Your Next Breakthrough System on an UNPARALLELED® Foundation
Ready to elevate your precision equipment to industry-leading standards? Whether you are developing a prototype or scaling mass production, UNPARALLELED® Group provides end-to-end engineering support, from material selection and CAD analysis to cleanroom assembly.
No cheating. No concealment. No misleading. - Our commitment to every global partner.
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