I. Product Overview
The industrial-grade granite precision platform, also known as a marble precision platform or granite inspection platform, is a high-precision reference gauge and supporting base made from high-quality natural black granite (such as Jinan Green, Taishan Green, etc.) as raw material, processed through multiple steps including strict material selection, natural aging, and precision grinding. Leveraging the core advantages of the material itself—excellent thermal stability, strong vibration damping, high hardness, and resistance to deformation—it completely overcomes the shortcomings of cast iron platforms, such as susceptibility to rust, high thermal expansion coefficient, and tendency to deform over long-term use. It is an indispensable core basic component in modern high-end precision manufacturing, metrology and testing, optical experiments, semiconductors, and ultra-precision motion systems.
Our company specializes in AA-grade ultra-high precision granite platforms, custom-processed specifically for air-bearing systems and nano-level positioning equipment. The surface adopts ultra-precision scraping/grinding processes, and its flatness and surface finish fully meet the requirements of high-end working conditions.
II. Core Material Characteristics
Extremely Strong Stability
The internal structure of natural granite is dense and uniform, with an extremely low thermal expansion coefficient. It is minimally affected by changes in ambient temperature, will not deflect or deform during long-term use, and can permanently maintain the accuracy of the reference plane. After long-term natural aging treatment, the internal stress of the stone is completely released, eliminating later accuracy drift.
Excellent Vibration Damping and Noise Reduction
The stone itself has a high damping coefficient, which can effectively absorb vibrations generated by equipment operation and the external environment, suppress resonance, and provide a stable operating environment for ultra-precision machining, testing, and air-bearing motion systems, significantly improving equipment operating accuracy and repeat positioning accuracy.
High Hardness, Wear-resistant and Durable
The Mohs hardness can reach level 6-7, the surface is scratch-resistant and wear-resistant, and there are no scratches under normal use; the texture is hard and pressure-resistant, capable of bearing heavy equipment and workpiece loads, with a service life far exceeding that of metal platforms.
Stable Physical and Chemical Properties
The overall material is non-magnetic and non-conductive, making it suitable for precision equipment in electromagnetic environments; it is resistant to acid and alkali corrosion, does not rust easily, and is not afraid of moisture, requiring no additional rust-proofing or anti-corrosion treatment, making maintenance simple.
High Surface Accuracy and Good Surface Finish
The working surface is processed through multi-layer fine grinding and manual scraping, resulting in low surface roughness and uniform flatness accuracy. At the same time, the surface is flat and smooth, adapting to special structures such as air-bearing guide rails, sliding modules, and sealing tooling.
III. Accuracy Grade Classification (Industry General Standard)
Referring to national standards and international metrology standards, and combining industrial application scenarios, the grades are divided as follows, with different accuracies corresponding to different application fields:
AA Grade (Ultra-High Precision Grade)
Flatness tolerance ≤2.5μm/m, which is the highest accuracy grade. It is mainly used in scenarios with extreme accuracy requirements such as air-bearing platforms, nano-positioning systems, optical experimental tables, high-end coordinate measuring machines, and semiconductor equipment. This is also the grade used for the 610×610×127mm air-bearing special platform.
00 Grade (Precision Grade)
Flatness tolerance ≤3μm/m, suitable for precision metrology rooms, gauge calibration, precision component inspection, and small precision machine tool bases.
0 Grade (Industrial Precision Grade)
Flatness tolerance ≤6μm/m, widely used in machining workshops, conventional quality inspection stations, tooling positioning, and ordinary precision equipment bases.
IV. Product Structure and Custom Processing
The platform can be fully customized according to the customer’s working conditions. The standard configuration is as follows:
Basic Specifications
Any length, width, and height dimensions can be customized, with standard thickness balancing rigidity and load-bearing capacity; the standard finished bare weight depends on the dimensions. The exterior uses a solid wood frame wooden box packaging to prevent bumps and displacement, suitable for long-distance sea and land transportation.
Hole Processing
Supports on-demand processing of various types of technical holes: threaded mounting holes, locating pin holes, center through-holes, countersunk holes, pneumatic installation holes, etc. The configuration for this customized model: 10 standard threaded holes 1 one-inch center through-hole, with an edgeless design, suitable for air-bearing module assembly.
Auxiliary Accessories
Optional accessories include adjustable leveling support feet, anti-vibration pads, limit baffles, protective frames, etc., to facilitate equipment leveling, installation, and protection.
V. Main Application Scenarios
- Ultra-precision Air-bearing Motion Systems (Main Application)
Air-bearing worktables, air-bearing guide rail bases, linear motor ultra-precision sliding tables, nano-level displacement positioning platforms, high-speed precision sliding equipment, serving as the core load-bearing base for frictionless high-precision motion mechanisms. - Metrology and Inspection Field
Coordinate Measuring Machine (CMM) complete machine bases and worktables, precision gauge/inspection tool calibration tables, component dimensional comprehensive inspection platforms, laboratory standard metrology tables, visual inspection & machine vision equipment bases. - Ultra-precision Machining
Ultra-precision lathe, ultra-precision grinder, mirror milling machine bases; five-axis linkage machining center support bases; precision engraving machines, micro-hole processing equipment, non-standard special precision machine tool reference tables. - Laser and Optoelectronics Industry
Laser cutting, laser welding, laser marking, laser micro-processing equipment bases; optical vibration isolation experimental tables, lens assembly alignment tooling, optoelectronic testing instruments, image measuring instrument bases. - Semiconductor and Electronics Manufacturing
Wafer processing equipment, chip packaging equipment, precision positioning stations for microelectronic components, semiconductor testing equipment, microelectronics assembly production line bases. - Automation and Robotics Industry
High-precision industrial robotic arm installation bases, micro-assembly automated production lines, precision conveying stations, non-standard automated equipment reference platforms. - Scientific Research Institutions and Laboratories
University physics, mechanics, and micro-nano technology laboratory experimental tables; scientific research institution precision testing platforms, load-bearing bases for various high-precision scientific research instruments.
VI. Product Advantages and Instructions for Use
(I) Product Advantages
Strict Material Selection: High-density natural granite raw stone is selected, rejecting impurities and inferior materials, ensuring material consistency from the source;
Mature Process: Combining mechanical grinding manual precision scraping processes, the accuracy is controllable, and each product comes with an accuracy inspection report upon leaving the factory;
Flexible Customization: Dimensions, hole positions, and installation forms can all be customized on demand to adapt to various non-standard equipment;
Easy Operation and Maintenance: No regular oiling or rust prevention is required. Daily maintenance only requires cleaning the surface, resulting in low overall operating costs.
(II) Precautions for Use and Storage
Placement Environment: Preferably placed in a dry, constant-temperature workshop, avoiding long-term exposure to sunlight and sudden temperature changes to reduce the impact of temperature fluctuations on accuracy;
Handling and Installation: Heavy-duty platforms require lifting tools for handling. After landing, use the support feet to slowly level the platform, avoiding strong single-point impacts;
Daily Maintenance: Use a soft cloth to wipe the working surface. Do not use sharp hard objects to scratch or heavy objects to strongly hit the surface;
Storage Requirements: Long-term…
VII. Parameters of the Main Featured Product (610×610×127mm AA-Grade Air Bearing Platform)
Overall Dimensions: 610×610×127mm (24×24×5 inches)
Precision Grade: AA-Grade Ultra-High Precision
Material: Natural AA-Grade Black Granite
Surface Finish: Ultra-Precision Grinding, compatible with air bearing systems
Hole Configuration: 10 threaded holes 1 center through-hole (1 inch), edgeless design
Net Weight per Unit: Approx. 127.4kg
Gross Weight per Unit: Approx. 140kg
Volume per Unit: 0.052CBM
