Precision Granite V-Blocks

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

In ultra-precision environments - from semiconductor wafer inspection to femtosecond laser alignment - even microscopic vibrations or thermal drift can compromise measurement integrity. That's why leading manufacturers and metrology labs worldwide rely on precision granite V-blocks as their foundational support structure. Unlike steel or cast iron, granite's inherent density (≈3100 kg/m³), thermal stability, and non-magnetic properties make it the only material capable of maintaining nanometer-level repeatability over decades of use.

At UNPARALLELED Group, we don't just manufacture V-blocks - we engineer stability. Each block is crafted from premium "Jinan Blue" granite, selected for its uniform grain structure and minimal internal stress. Our master grinders, with over 30 years of experience, hand-finish every surface to ensure perfect 90° V-groove accuracy and parallelism within ±0.001mm. Whether you're calibrating a CMM probe or supporting a silicon wafer during lithography, our V-blocks deliver the silent, unwavering foundation your process demands.

• Unmatched Stability: Granite's high density and low thermal expansion coefficient eliminate drift caused by temperature fluctuations - critical for 24/7 production lines.
• Non-Magnetic & Non-Conductive: Safe for use in sensitive electronic environments, including semiconductor cleanrooms and MRI-compatible equipment.
• Corrosion & Wear Resistant: Unlike metal, granite won't rust, oxidize, or degrade when exposed to coolants, acids, or humidity - ensuring decades of reliable service.
• Hand-Finished Precision: Every V-block is individually ground and inspected by our "Walking Electronic Levels" - master artisans whose tactile sensitivity surpasses automated systems for final tolerance verification.
• Global Traceability: All units come with certified inspection reports traceable to ISO/IEC 17025 standards, ensuring compliance with aerospace, automotive, and medical device regulations.

• Semiconductor Manufacturing: Support wafers during alignment and inspection without introducing electrostatic discharge or thermal distortion.
• Automotive Metrology: Hold engine crankshafts or camshafts for runout measurement with zero deflection - even under heavy load.
• Laser & Optical Systems: Provide vibration-dampening mounts for mirrors and lenses in interferometers or lithography tools.
• CMM Calibration: Serve as reference standards for probe tip verification, ensuring measurement uncertainty remains below 0.5μm.

Q: Why not use steel or aluminum V-blocks?
A: Steel expands with heat and can magnetize, interfering with sensitive instruments. Aluminum is too soft and deforms under load. Granite offers superior dimensional stability, hardness, and environmental resistance - making it the industry standard for sub-micron work.
Q: Can you customize the V-angle or size?
A: Absolutely. We regularly produce custom V-blocks with angles from 60° to 120°, and sizes ranging from 50mm to 1000mm. Just share your drawing or requirements - we'll engineer the perfect solution.
Q: How do I maintain my granite V-block?
A: Simply wipe with a lint-free cloth and mild detergent. Avoid abrasive cleaners or impact loads. Store in a dry, temperature-stable environment to preserve its geometric integrity.
Q: What certifications do your V-blocks carry?
A: All units are manufactured under ISO 9001, ISO 14001, and ISO 45001 systems. Inspection reports are traceable to national metrology institutes and comply with DIN, JIS, and ASME standards upon request.

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