Granite precision instrument platform, made of high-quality “Jinan Blue” stone material through mechanical processing and manual grinding. High, no deformation, good stability, long service life, suitable for measurement work in mechanical factories and laboratories.

The main mineral composition of “Jinan Blue” granite is hornende, plagioclase, biotite, and a small amount of magnetite, with a black color, precise structure, and after billions of years of aging, uniform, good stability, high strength, and high hardness, which can maintain high precision under heavy load.

Advantages:

1. High precision, good stability, and not easy deform, which can guarantee the measurement accuracy at room temperature.
2. Does not rust, resistant to acid and alkali, and does not require special maintenance.
3. wear resistance and long service life.
4. Scratches and bumps on the working surface do not affect the measurement accuracy.
5. There is no magnetization problem.

. It can slide smoothly without any drag feeling during measurement.

The precision of the granite flat plate is referenced to various advanced national standards, and the flatness tolerance is based: JB/T7975-1999 standard: 000 grade = 1 × (1   d/1000) um;00 grade = 2 × (1   d/1000) um; 0 grade = 4 × (1   d/1000); 1 grade = 8 × (1   d/1000) um (d is the diagonal mm) (measurement temperature is generally 20 ±  ℃).