High-Density Granite Surface Plate

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

The key to our superior performance lies in our material: the proprietary UNPARALLELED® Black Granite.

• Extreme Density: Sourced for its exceptionally fine crystalline structure, our granite boasts a density of approximately 3100 kg/m³. This is significantly higher than many standard black granites used globally and completely superior to the soft, less stable marble that some less scrupulous companies use (a practice we firmly oppose).
• Dimensional Perfection: After millions of years of natural geological aging, our granite is inherently free of internal stress. This ensures zero risk of deformation over time due to internal instability, offering the highest level of long-term dimensional stability for your critical measurements.
• Thermal Inertia: Its low thermal conductivity and minimal coefficient of linear expansion mean the plate maintains its accuracy even with slight ambient temperature variations-far outperforming metal alternatives.

Every UNPARALLELED® High-Density Granite Surface Plate is a product of master craftsmanship and cutting-edge technology.

• Precision Finish: The final surface is achieved using our four dedicated production lines and massive Taiwanese NanT grinding machines, followed by meticulous hand-lapping by artisans with over 30 years of experience. This unique combination allows us to achieve flatness that reaches the nanometer level (e.g., DIN 876 Grade 00 or better), making us the choice for the most demanding reference applications.
• Superior Structure: The dense structure ensures the plate is non-magnetic, non-rusting, highly wear-resistant, and impervious to typical shop floor chemicals. Scratches will not raise burrs or disrupt the surrounding surface plane-a crucial advantage over cast iron.
• Global Compliance: We manufacture and inspect all plates to comply with major international standards, including DIN 876, ASME B89.3.7, JIS B 7510, and British BS 817. Your quality is globally validated.

Our High-Density Granite Surface Plate are the indispensable datum plane across a vast spectrum of high-technology industries:

One of the great features of our Precision Granite Surface Plates is their low-maintenance nature.

• Cleaning: The surface should be cleaned regularly with a mild, pH-neutral solution (like a quality granite cleaner) to remove dust, oil film, or residue. Avoid highly acidic or alkaline cleaners.
• Handling: Though exceptionally hard, always handle the plate with care. Avoid dropping heavy or sharp objects onto the surface, which can cause chipping.
• Usage: Always place your measuring instruments and workpieces onto the plate gently. When not in use, keep the plate covered to protect it from settling dust and contaminants.

This plate is designed to last for decades, maintaining its accuracy long after other equipment has been replaced. When you choose UNPARALLELED, you choose a manufacturer that has partnered with global leaders like GE, Samsung, and top metrology institutes worldwide.

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