In the relentless pursuit of sub-micron and nanometer precision, the choice of material for the core mechanical base is perhaps the most critical engineering decision. High-precision instruments—from Coordinate Measuring Machines (CMMs) and 3D printers to advanced laser and engraving machines—increasingly rely on Granite Mechanical Components for their worktables and bases.
At ZHHIMG®, we understand that our precision granite is more than just a material; it is the unshakeable foundation that guarantees the accuracy and repeatability essential for modern technology. Here is a breakdown of why this natural stone is the superior choice for high-precision equipment.
The Defining Physical Advantages of Granite
The transition from metal bases to granite is driven by the stone’s inherent physical properties, which are perfectly suited to the demands of metrology and ultra-precision movement control.
1. Exceptional Thermal Stability
A primary concern for any precision system is thermal deformation. Metal materials expand and contract significantly with minute temperature changes, potentially warping the entire reference plane. Granite, in contrast, possesses excellent thermal stability. Its extremely low coefficient of thermal expansion means that during operation or even during mold testing, the granite worktable is not prone to thermal deformation, effectively maintaining geometric accuracy despite ambient temperature fluctuations.
2. Inherent Dimensional Stability and Stress Relief
Unlike metallic bases that can suffer from internal stress release—a slow, unpredictable process that causes permanent creep or warpage over time—Granite Mechanical Components have naturally stable shapes. The geological aging process spanning millions of years has relieved all internal stresses, ensuring the base remains dimensionally stable for decades. This eliminates the uncertainty associated with stress relaxation found in metal materials.
3. Superior Vibration Damping
During the operation of precision instruments, even microscopic environmental and internal vibrations can destroy measurement integrity.Granite mechanical components have remarkable shock absorption and vibration damping properties. The fine crystalline structure and high density of the stone naturally dissipate vibrational energy faster and more effectively than steel or cast iron. This ensures a quiet, stable foundation, which is paramount for sensitive processes like laser alignment or high-speed scanning.
4. High Wear Resistance for Enduring Precision
For worktables and bases that must withstand constant use, wear is a major threat to accuracy. Granite platforms crafted from material with a Shore hardness of 70 or higher are highly resistant to wear. This hardness ensures that the precision of the working surface—particularly its flatness and squareness—remains unchanged under normal operating conditions, guaranteeing long-term fidelity for the precision instrument.
Maintenance is Key to Longevity
While ZHHIMG® granite bases are built for longevity, their use in high-precision environments requires respect and proper handling. Precision measuring instruments and the tools used on them require careful treatment. Heavy tools or molds must be handled gently and placed softly. Applying excessive force when setting down parts can cause irreparable damage to the granite surface, compromising the platform’s usability.
Furthermore, cleanliness is vital for aesthetics and maintenance. While granite is chemically resistant, workpieces with excessive oil or grease must be properly cleaned before placement. Neglecting this over time can lead to the granite mechanical components becoming mottled and stained, although this does not affect the physical precision of the platform itself.
By choosing Precision Granite Mechanical Components for their worktables, side guides, and top guides, manufacturers effectively lock in the measurement accuracy and repeatability that their high-precision instruments demand.
Post time: Nov-10-2025