Outstanding Physical Advantages of Our Exclusive Black Granite
All blanks for air bearings and measuring rulers are sourced from exclusive black granite ore with a density of nearly 3100kg/m³. Its internal crystal structure is compact and uniform, with completely released internal stress after natural aging treatment. Compared with black granite mined in Europe and America, our material boasts lower thermal expansion coefficient, stronger vibration absorption capacity and better compressive rigidity.
We strictly separate granite raw materials from low-cost marble to avoid performance attenuation of finished products. Marble has loose texture, poor anti-deformation ability and obvious temperature drift, which cannot meet the long-term stable operation requirements of air bearings and the permanent flatness standard of measuring rulers. Following the customer commitment of No cheating, No concealment, No misleading, every batch of stone is tested for physical indicators before entering production, so as to lay a solid foundation for high-performance finished products.
Precision Granite Air Bearing: Stable Motion Core for Ultra-Precision Equipment
Granite air bearing is a key moving component for zero-friction linear motion platforms. We customize air bearing bases, air float gantries and air bearing sliding tables according to customers’ drawings, matching linear motor platforms, XY motion stages, semiconductor wafer inspection equipment and femtosecond laser processing machines. 
Our factory owns super-large CNC machining equipment and heavy-duty silent cranes, supporting the integral processing of extra-large air bearing bases up to 100 tons. Four professional granite production lines ensure efficient batch delivery, with a monthly output of thousands of sets of standard air bearing substrates. The whole processing process is completed in a 10,000 ㎡ constant temperature and humidity workshop surrounded by deep vibration-proof trenches, which eliminates external vibration interference and ensures the flatness of the air film surface reaches nanometer level.
Equipped with four high-value Taiwan Nantou super grinding machines, we can precisely grind air bearing surfaces with a maximum length of 6000mm. Polishing masters with over 30 years of manual grinding experience finely trim the air float surface by hand, accurately controlling the micron-level depth of the air flutes. Matched with internationally leading testing equipment including British Renishaw laser interferometers and Swiss WYLER electronic levels, every air bearing undergoes full inspection before delivery, and all test data can be traced to national metrology standards through official calibration certificates.
Granite Measuring Ruler Series: Reliable Calibration Benchmark for Global Metrology
Our full range of granite measuring rulers includes straight rulers, square rulers, triangular rulers and special stepped rulers, all crafted from the same high-performance black granite material. The dimensional accuracy of all finished measuring rulers is controlled within 1μm, while the flatness of long straight rulers reaches nanometer standard, serving as essential calibration tools for metrology laboratories, precision equipment assembly workshops and third-party inspection institutions.
Different from metal measuring tools that are prone to rust, deformation and temperature deviation, granite measuring rulers feature corrosion resistance, non-magnetism and stable size. Even after decades of repeated use, the measuring surface will not warp or wear, maintaining consistent calibration accuracy. Our technical team masters multiple international measurement standards such as German DIN, American ASME and Japanese JIS, and all products fully comply with global precision industry norms to meet the procurement needs of customers from different countries.
ZHHIMG’s Comprehensive Strength Backing High-Performance Granite Products
ZHHIMG stands alone in the industry as the only manufacturer holding complete ISO9001, ISO45001, ISO14001 and CE certifications. We have registered more than 20 international patents and trademarks in the EU, the United States and Southeast Asia through CCPIT, forming a complete independent intellectual property protection system.
We maintain long-term technical exchanges with world-renowned universities and national metrology institutes in Singapore, Sweden, France, the United States and Russia, continuously optimizing the processing technology of granite air bearings and measuring rulers. Our global customer network covers Fortune 500 enterprises including Apple, Samsung, Bosch and GE, as well as professional precision brands such as Akribis, THK and Wyler, covering semiconductor, new energy, optical detection and precision machinery industries.
Guided by the core values of Openness, Innovation, Integrity, Unity, we adhere to the enterprise spirit of Dare to be first; Courage to innovate and the quality policy that The precision business can’t be too demanding. We take promoting the development of the ultra-precision industry as our unshakable mission, and strive to build a world-class manufacturing enterprise trusted by partners all over the world.
Conclusion
High-performance granite air bearings and granite measuring rulers are indispensable basic components in modern ultra-precision manufacturing. With exclusive high-density black granite raw materials, advanced constant-temperature vibration-proof production environment, mature nanometer manual polishing technology and complete international certification qualifications, ZHHIMG provides customized, long-life and high-stability granite solutions for global high-end precision industries. We will keep exploring breakthroughs in ultra-precision processing technology, and use reliable, high-performance granite products to empower the upgrading of global high-end equipment manufacturing.
Post time: Jul-23-2026