In the field of precision metrology and semiconductor manufacturing, Granite is revered as the "Cornerstone of Measurement."

It is far more than just a stone; it serves as the core physical support that guarantees nanometer-level accuracy.

1. Why Choose Granite? (Core Physical Properties)

Compared to traditional cast iron surface plates, granite offers incomparable physical advantages.

Physical Stability

Low Coefficient of Thermal Expansion: Granite has an extremely low coefficient of thermal expansion, meaning its dimensions remain virtually unchanged despite minor temperature fluctuations in a laboratory environment.

Minimal Internal Stress: Through hundreds of millions of years of Natural Aging, the internal crystalline structure of granite has become exceptionally stable. Once machined into shape, it does not suffer from the creep or deformation common in metallic materials.

Material Durability 

High Hardness and Wear Resistance: Its hardness typically ranges from 6 to 7 on the Mohs scale. It boasts high compressive strength and is highly resistant to scratching.

Rust-proof and Corrosion-resistant:Unlike metals, granite is highly resistant to acids and alkalis. It requires no anti-rust oil coatings, making maintenance remarkably simple.

Non-magnetic:During electronic precision measurements, granite generates no magnetic interference, which is vital for the stability of precision electromagnetic induction instruments.

2. Core Application Scenarios

Granite surface plates serve as the "Zero-point Reference" for precision inspection in both laboratories and factories.

Coordinate Measuring Machines (CMM):Most high-precision CMM bases and beams are made of granite to ensure the absolute straightness and flatness of the measurement paths.

Semiconductor Processing Equipment:In lithography machines and wafer inspection systems, motion stages are typically mounted on massive granite bases to absorb micro-vibrations.

Reference Planes:Used to inspect the flatness and straightness of workpieces, and as the foundational surface for layout marking and the installation of precision instruments.

If you have similar inquiry, please contact with me feel free:

Email: granite@nd-cnc.com

Whatsup/phone number: 008615628830716.