Precision Granite Surface Plates

UNPARALLELED LTD is one of the leading manufacturers and suppliers of precision granite surface plates in China. With abundant experience, we warmly welcome you to buy advanced precision granite surface plates made in China here from our factory. We also accept custom orders.

The Gold Standard in Dimensional Metrology and Precision Manufacturing

In the world of ultra-precision, the measurement reference is everything. At UNPARALLELED Group, we don't just produce granite surface plates; we manufacture the definitive foundation for accurate measurement, assembly, and calibration. Our UNPARALLELED® Precision Granite Surface Plates are engineered to be the most stable, accurate, and reliable benchmarks in your metrology lab or assembly environment.

Why Choose UNPARALLELED® Granite? A Technical Advantage

Our competitive edge is built into the material itself. While many use cheaper marble or standard granite, UNPARALLELED Group exclusively utilizes our proprietary UNPARALLELED® Black Granite, selected for its superior physical properties crucial for achieving sub-micron and nanometer-level flatness.

• Exceptional Density: Our black granite boasts an industry-leading density of . This high density is critical for vibration dampening, minimizing the transmission of floor-based disturbances into your critical measurements.
• Superior Stability: The high percentage of quartz and low water absorption rate ensure exceptional dimensional stability and minimal thermal expansion, outperforming most common black granites globally. This stability is non-negotiable for high-precision applications.
• Ultimate Accuracy: Utilizing our advanced Taiwanese NANT grinding machinery and decades of manual lapping experience, we guarantee flatness tolerances that meet or exceed the most demanding global standards (e.g., DIN 876 Grade 00, ASME B89.3.7-2013). We achieve nanometer-level precision on request.

Trust is built on standards and verifiable quality. We are the only manufacturer in this specialized industry to hold ISO 9001, ISO 14001, ISO 45001, and CE certifications, demonstrating our commitment to quality, environmental responsibility, and occupational health.

Every UNPARALLELED® Surface Plate is:

• Traceable: Calibrated using advanced equipment like Renishaw Laser Interferometers and certified by accredited institutions, ensuring traceability to national metrology institutes (e.g., NMI, PTB).
• Standard Compliant: Manufactured to rigorous global specifications including DIN 876, ASME B89.3.7, JIS B 7513, and GB standards, making them compatible with your international quality systems.

A precision surface plate is the must-have metrology tool for any high-tech industry. Our Precision Granite Surface Plates provide the essential level and stable datum reference for:

• Metrology Labs: Serving as the base for CMMs (Coordinate Measuring Machines), height gauges, electronic levels, and optical comparators.
• Semiconductor Manufacturing: Base plates for wafer inspection and lithography equipment.
• Aerospace & Defense: Calibration and final inspection of complex, critical components.
• Precision Assembly: Used as the flat reference base for assembling machine tool beds, linear stages, and air bearing systems.
• Quality Control (QC): Essential for checking the flatness, squareness, and parallelism of machined parts.

While granite is exceptionally durable, proper care ensures your precision reference maintains its integrity for decades:

• Cleaning: Regularly wipe the surface with a non-abrasive, lint-free cloth dampened with pure mineral spirits (or designated granite cleaner). Avoid harsh solvents or household cleaners.
• Handling: Never slide heavy or sharp objects across the surface. Use precision parallels or lifting gear with care.
• Calibration: Establish a regular re-calibration schedule (typically annually or bi-annually) using a laser interferometer to verify the flatness remains within tolerance.
• Environment: Maintain a stable temperature environment. Our commitment to you: Our plates are final-lapped in a dedicated, vibration-free, constant temperature workshop to ensure maximum stability upon delivery.

UNPARALLELED Commitment to Integrity: Our corporate promise is "No cheating, No concealment, No misleading." We guarantee our products deliver the exact precision specified, every time.

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