Granite square box

NegotiableUpdate on 02/01

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Nature of the Manufacturer: Producers

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Overview

Granite square box, marble square box, and rock square box are mainly used for checking the parallelism and perpendicularity of components and supporting workpieces when drawing lines. They are generally cubes or rectangular prisms with the same side length. Granite square boxes are mainly composed of pyroxene and plagioclase, with a black color and precise structure. The granite square box manufacturer chose us.

Product Details

Granite square boxMainly used for checking the parallelism and perpendicularity of components and supporting workpieces during marking, usually in the form of cubes or rectangular prisms with the same side length.

Granite square boxIt is mainly composed of pyroxene and plagioclase, with a black color and precise structure.

Granite square boxes cannot withstand excessive impact or knocking, and the humidity should not be too high, otherwise it will cause deformation of the square box.

Technical parameters of granite square box:

Specific gravity: 2970-3070kg/m3

Compressive strength: 245-254kg/mm2

Elastic wear: 1.27-1.47N/mm2

Linear expansion coefficient: 4.6 × 10-6/℃

Water absorption rate 0.13%

Shore hardness above HS70.

Granite square box specification (mm)	Flatness of working face relative to parallelism of working face		Verticality between working faces		The difference between each pair of parallel gauge H.W
	Accuracy level (mm)
	00	0	00	0	00	0
100×100×100	0.001	0.002	0.001	0.002	0.001	0.002
150×150×150	0.0015	0.003	0.001	0.002	0.0015	0.003
200×200×200	0.002	0.004	0.0015	0.003	0.002	0.004
300×300×300	0.003	0.006	0.0015	0.003	0.003	0.006
400×400×400	0.004	0.008	0.002	0.004	0.004	0.008
500×500×500	0.004	0.008	0.002	0.004	0.004	0.008