Granite (marble) surface plate
Specifications / Features
Granite (marble) surface plate with precise structure and also gloss black, uniform and stable, the big strength of Granite (marble) surface plate at the same time, the characteristics of higher hardness, under heavy load can still maintain a high accuracy even if suffers the heavy Kepeng, at least off several grain of ballast only. Granite (marble) surface plate in addition to the above characteristics, also has "three defenses" characteristics - anti magnetization, anti-corrosion, anti deformation.The physical characteristics of the Granite (marble) surface plate with 2-3 times higher than the cast iron hardness equivalent to HRC > 51, reach Mohs hardness of 6-7; at the same time, the compressive strength of 2290-3750 kg / square cm.
The use of Granite (marble) surface plate widely used in test of instrumentation, precision tools, machinery parts, as the most suitable datum, especially in the measurement of high precision is most suitable.
The physical properties of Granite (marble) surface plate:
Plane tolerance in accordance with GB4987-85 standards:
000 level =1 * (1+d/1000) M
00 level =2 * (1+d/1000) M
0 level =4 * (1+d/1000) M
1 level =8 * (1+d/1000) m (D for the diagonal mm) (measured temperature is generally in the 20 + 2 degrees C)
Granite (marble) surface plate proportion: 2970 -3070kg/ square meters
