High Precision Granite Surface Plate - A variety of specifications

Our granite measuring devices and granite mechanical components are made of high qualityJinan Blackgranite.Due to their high precision,long duration,good stability and corrosion resistance,they have been more and more used in product inspection of modern industy and such scientific areas as mechanicalaerospace and scientific researches.

Physical Property ofJi Nan BlackGranite:

Specific Gravity: 2970-3070kg/m³

Compressive Strength: 245-254Mpa

Elastic Modulus: 30-50Gpa

Linear Expansion Coefficient: 4.61x10^-6/⁰C

Water Absorptivity: ≤0.07

Shore Hardness: Above 70Hs

The "GOLD STONE"brand of granite measuring tools have the following characteristics:

1 High precision reliable stability resistant to deform and guaranteed accuracy under normal ambient temperature.

2 No-rust and anticorrosion.

3 Wear resistance long service life.

4 Any cutting or scraching for working surface does not bring about roughedgeswhich might influence its measuring precision.

5 Non magnetization.

6 Glossy surface without sluggishness when the workpieces or tools are moving on it.

The GOLD STONE brand granite surface plate refers to the advanced standards of the developed countries, and its flatness tolerance is in accordance with the GB/T 20428-2006 Surface Plate Standard:

Grade 000 (0.003xL+2.5)/4μm

Grade 00 (0.003xL+2.5)/2μm

Grade 0 (0.003xL+2.5)μm

Grade 1 (0.006xL+5)μm

(d is the length of the diagonal)

1 Welcome your enquiry for other specifications. The largest size for production is 4000mm width and 10000mm length.

2 We also accept to do relevant processing on the plate, such as drilling, glue inserts, glue T-slot, etc. (According to the drawing, estimate the product.)