The marble flat platform is a measuring tool and instrument platform made of marble, also known as granite flat, which is made of "Jinan green" stone material through mechanical processing and manual precision grinding. Black luster, structure, uniform texture, good stability, high strength, can be maintained under heavy loads and general temperatures, and has the advantages of non rusting, non magnetization, and non deformation. The marble flat platform is a benchmark measuring tool made of stone material, which is an ideal reference surface for the inspection of instruments, tools, and mechanical parts. Especially in terms of measurement, due to its characteristics, cast iron flat plates are inferior, while marble flat plate platforms are suitable for industrial production and laboratory measurement work.

Physical properties of marble tablet platform:

Flatness tolerance according to GB4987-85 standard:

Level 000=1 × (1+d/1000) um Level 00=2 × (1+d/1000) um

Level 0=4 × (1+d/1000) um Level 1=8 × (1+d/1000) um

(d is diagonal mm) (The measurement temperature is generally at 20 ± 2 ℃)

Proportion of marble flat platform: 2970-3070kg/㎡

Compressive strength: 245-254N/m

Linear expansion coefficient: 4.61 × 10-6/℃,

Water absorption rate:<0.13%

Operation of marble tablet platform:

1. Before use, the marble tablet platform needs to be leveled;

2. Wipe the board surface clean with a sticky alcohol cotton cloth;

3. Place the workpiece to be measured and related measuring tools on a marble flat platform for 5-10 minutes until the temperature is adjusted, and then proceed with the measurement;

4. After the measurement is completed, wipe the surface clean and cover it with a protective cover.