Granite/Marble Mechanical Components: Core Reference Tools in Precision Measurement

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        Granite/Marble mechanical components are essential precision reference tools, widely used in dimensional inspection and laboratory measurement tasks. Their surfaces can be custom-processed with various holes and grooves, such as through-holes, slots, U-grooves, threaded holes, and slotted holes, enabling them to highly adapt to different mechanical setups. These customized or irregularly shaped Granite/Marble bases are generally referred to as Granite/Marble structures or Granite/Marble components.

With decades of production experience, our company has established a solid reputation in the design, manufacturing, and refurbishment of Granite/Marble mechanical parts. Particularly in high-precision industries with extremely high accuracy requirements, such as metrology laboratories and quality control departments, our solutions are highly trusted. Through stable material selection and strict quality control, our products consistently meet or exceed tolerance standards.

Granite/Marble mechanical parts are made from natural stones formed over millions of years, thus possessing excellent structural stability, and their accuracy is hardly affected by temperature changes. According to Chinese standards, Granite/Marble mechanical components are classified into Grade 0, Grade 1, and Grade 2 based on precision requirements.

Typical Applications and Characteristics

Wide Industrial Usage

Granite/Marble mechanical parts are widely used in industries such as electronics, automotive, machinery, aerospace, and precision manufacturing. Due to their superior thermal stability and wear resistance, designers often prefer Granite/Marble components over traditional cast iron plates. By integrating T-slots or precision bores into the Granite/Marble base, their application range is significantly expanded, covering everything from inspection platforms to machine foundation components.

Precision and Environmental Considerations

The precision level determines the operating environment of the components. For example, Grade 1 components can be used under standard room temperature, while Grade 0 components usually need to operate in a constant temperature environment and require pre-conditioning before use to maintain the highest measurement accuracy.

Material Differences

There are differences between the Granite/Marble used in precision components and that used for decorative building purposes:

• Precision-grade Granite/Marble: Density is 2.9-3.1 g/cm³

• Decorative Granite/Marble: Density is 2.6-2.8 g/cm³

• (For comparison) Reinforced concrete: 2.4-2.5 g/cm³

Example: Granite/Marble Air-Floating Platform

In high-end applications, Granite/Marble platforms can be combined with air-bearing systems to form air-floating measurement platforms. Such systems install porous air bearings on precision Granite/Marble rails to achieve frictionless motion, which is ideal for two-axis gantry measurement systems. To achieve the required ultra-flatness, the Granite/Marble surfaces undergo multiple rounds of precision lapping and polishing, with constant temperature monitoring using electronic levels and advanced measuring tools. The measurement results in a standard environment and a constant temperature environment may differ by 3 microns, which highlights the critical role of environmental stability.