Complementary application of mineral castings and premium granite expands diversified material options for ultra-precision equipment bases.

   Natural high-density black granite boasts extreme long-term dimensional stability forged by hundreds of millions of years of geological crystallization, making it an ideal core substrate for metrology benchmarks and static inspection platforms. However, restricted by natural quarrying and cutting processes, it incurs high processing costs and long lead times when fabricating complex hollow structures, parts with embedded pipelines and integrated special-shaped frames. Mineral castings (epoxy mineral composites) adopt room-temperature integral casting technology, standing out for high-frequency vibration damping, integrated structural forming and lightweight design, yet they fall short of natural granite in retaining geometric accuracy over decades of service.
   UNPARALLELED Group has built an integrated R&D, customization and manufacturing system covering premium granite and mineral castings. It matches substrates to diverse working scenarios including dynamic operation, static metrology, high-speed machining and constant-temperature laboratories, and launches three complementary application modes: layered matching, split assembly and composite splicing. The solution breaks the bottleneck of single-material selection, expands diversified base design options for ultra-precision equipment manufacturers, and reshapes material selection criteria across the industry.
   I. Distinct Core Performance of the Two Substrates Creates Irreplaceable Complementary Value
Core Strengths of Premium Natural Granite: Superior Long-Term Static Stability, Ideal for Metrology Benchmarks
   Zero creep and stable dimensions for decades
   With a density of 3100kg/m³, compact natural black granite undergoes 6–12 months of natural aging to release residual stress. Free of resin and bonding layers, it generates no interlayer deformation under long-term heavy loads and cyclic temperature & vibration changes. Its flatness and straightness remain drift-free for 10–15 years. It suits Grade 000 surface plates, static wafer inspection benchmarks and standard measuring tools for national metrology institutes, and passes long-term stability audits under global metrology standards including DIN, ASME and JIS.
   Uniform natural texture, non-magnetic and corrosion-resistant
   The natural stone features evenly distributed mineral grains. It is non-magnetic, acid & alkali resistant and free from coating peeling risks, perfectly fitting high-precision stationary stations such as semiconductor vacuum inspection and optical interferometry. After micron-level manual grinding, it forms nano-level mirror reference surfaces, serving as the exclusive optimal material for core measuring surfaces of equipment.
   Limitations for complex working conditions
   Natural stone cannot be integrally cast with built-in cooling channels, hydraulic ports or sensor slots. Cutting oversized special-shaped gantries and multi-layer hollow frames leads to massive material loss and excessive overall weight. Its vibration damping efficiency under high-frequency vibration from linear motors is inferior to mineral castings.
   Core Strengths of Mineral Castings: Excellent High-Frequency Vibration Damping & One-Piece Complex Forming
Made of graded quartz aggregate and modified epoxy resin cast at ambient temperature, mineral castings form multi-layer damping dissipation channels via viscoelastic resin. Their capacity to absorb high-frequency vibration is 4 times that of natural granite and 10 times that of cast iron, effectively eliminating resonance and chatter generated by high-speed spindles and linear motors. This drastically improves surface finish of machined workpieces and extends tool service life.
   Integrated design greatly simplifies assembly
   Cooling channels, cable troughs, positioning pins and foot supports can be pre-embedded during casting. Gantries, columns and double-layer hollow frames are formed in one piece without splicing and bonding multiple stone blocks, cutting assembly errors and shortening overall equipment production cycles by over 30%.
   Lightweight and low thermal conductivity with outstanding dynamic thermal stability
   Its density is merely 80% of granite and one-third of cast iron, lowering driving loads via reduced overall equipment weight. Its ultra-low thermal conductivity prevents short-term workshop temperature fluctuations from transferring to machining zones, making it suitable for 72-hour non-stop high-speed automated production lines.
   Limitations for static metrology scenarios
   The resin matrix generates slight creep under long-term high temperature and sustained static loads, failing to meet the ultra-high long-term shape retention requirements of measuring instruments and standard benchmarks. Thus it is not recommended for core measuring surfaces.
   II. Three Complementary Application Schemes Cover All Types of Ultra-Precision Equipment
   Scheme 1: Split Assembly - Mineral Cast Frame + Granite Reference Plate (Mainstream Mass-Production Solution)
The main gantry, columns and load-bearing base of equipment are integrally cast from mineral castings to suppress overall dynamic vibration by virtue of its high damping and integrated forming advantages. The core measuring and machining surfaces are separately fitted with premium granite plates finished via micron manual grinding, balancing vibration damping during dynamic operation and long-term stability for static measurement.
Applicable scenarios: Femtosecond laser microfabrication equipment, 5-axis ultra-precision grinders, automated wafer sorting lines, lithium electrode inspection equipment.
   Benefits: Overall resonance error reduced by 70%, zero precision attenuation of core reference planes within 10 years, and comprehensive manufacturing costs cut by 22% compared with all-granite structures.
   Scheme 2: Layered Composite - Lower Mineral Cast Damping Base + Upper Granite Metrology Platform
   A thickened mineral casting base acts as a vibration buffer layer to isolate low-frequency vibration from workshop cranes and external road traffic. A monolithic high-density granite benchmark platform is locked above via high-precision positioning pins, forming a dual-layer structure of "vibration buffering + long-term stable benchmark".
   Applicable scenarios: Laboratory CMMs, optical interferometry inspection platforms, high-end semiconductor metrology equipment.
Benefits: Nano-level measuring accuracy achieved without independent shockproof foundations, ideal for renovation projects of small and medium-sized metrology laboratories.
   Scheme 3: Zoned Splicing - Mineral Castings for Motion Zones, Granite for Static Metrology Zones
   Large integrated equipment adopts zoned material selection: mineral castings are used for high-speed linear motion and spindle machining cavities with integrated cooling and sensor pipelines; granite benchmark blocks are embedded at fixed inspection and visual alignment stations. Materials are selected by zone to balance integral structural integrity and local ultra-high precision demands.
Applicable scenarios: Large-area perovskite photovoltaic equipment, large gantry precision inspection machines, multi-station automated assembly platforms.
   III. Full-Support Manufacturing Capacity Enables Mass Delivery of Dual-Material Complementary Solutions
Leveraging two 200,000 m² intelligent manufacturing bases in Jinan, UNPARALLELED operates dedicated granite precision machining workshops and constant-temperature mineral casting production lines, covering the full workflow of design, processing, inspection and standard compliance for both materials.
   Coordinated Process Matching
   Thirty years of micron-level manual nano grinding technology enables the production of Grade 000 ultra-precision reference surfaces for granite. Mineral castings are produced with vacuum infusion modified formulas, followed by CNC milling to finish mounting surfaces. Dimensional tolerances of both components comply uniformly with eight major international metrology standards, eliminating cumulative errors after assembly.
  Full-Traceability Metrology Inspection
The 10,000 m² shockproof, constant-temperature and dust-free inspection center is equipped with full traceable measuring instruments from Mahr and Renishaw. Damping and thermal expansion indicators of mineral castings, together with flatness and density data of granite, are quantitatively verified simultaneously. Each combined base is attached with complete physical property test archives to satisfy supply chain audits of Fortune Global 500 corporations including Apple, Bosch, GE and Samsung.
Stable Delivery for All Working Conditions
   The company can mass-produce monolithic granite components up to 100 tons and 20 meters long, as well as irregular complex mineral cast frames. Supported by Lingang's multimodal logistics network, complete dual-material base assemblies are exported in bulk to Europe, America, Southeast Asia, Central Asia and other regions, solving the single-material selection pain points of overseas equipment manufacturers.
   IV. Industrial Trend: Dual-Material Compatibility Becomes Mainstream for High-End Equipment Bases
   Industry survey data shows that over 60% of global manufacturers developing new high-end ultra-precision equipment in 2026 abandon single-material design and adopt the complementary combination of mineral castings and granite, emerging as a new material selection trend for machine tools, semiconductor equipment and optical instruments.                                                                                                                                                                            
   The industry once fell into the dilemma of binary choice: manufacturers either adopt full expensive granite for long-term precision and raise overall equipment costs, or choose mineral castings for structural simplicity while sacrificing long-term stability of metrology benchmarks. As downstream clients raise simultaneous requirements for dynamic machining performance and static metrology accuracy, the cost-performance and comprehensive performance advantages of combining the two materials stand out.
   Industry experts predict that market share will keep shrinking for manufacturers only capable of processing a single substrate over the next 3–5 years. Leading enterprises that master R&D and manufacturing of both granite and mineral castings and provide integrated complementary design solutions will hold dominant sway over industrial material selection.