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Marble square

The marble square is a professional measuring tool, referred to as a square ruler. In some cases, it is also called a ruler. It is used to detect the verticality of the workpiece and the verticality of the relative position of the workpiece, and sometimes used for scribing. Granite squares are suitable for verticality detection.

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Marble measuring tools series

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Product description

The marble square is a professional measuring tool, referred to as a square ruler. In some cases, it is also called a ruler. It is used to detect the verticality of the workpiece and the verticality of the relative position of the workpiece, and sometimes used for scribing. Granite squares are suitable for verticality detection. Plane accuracy standard GB6092-85, verticality standard GB6092-85. Weight reduction holes have been added to reduce weight and facilitate processing. The tolerance on the side is 0.02.

Marble squares are mainly used for the measurement of flatness, verticality and straightness of workpieces. The main mineral components of marble square are escaping stone, plagioclase, a small amount of olivine, biotite and trace magnetite, black color, and precise structure. After hundreds of millions of years of aging, the texture is uniform, the stability is good, the strength is strong. High hardness and high precision under heavy load. Suitable for measurement in industrial production and laboratories.

Marble square ruler features:

1. The rock has long-term natural aging, uniform structure, minimal linear expansion coefficient, complete disappearance of internal stress, no deformation, and therefore high precision.

2. Good rigidity, high hardness and strong wear resistance.

3, not afraid of acid, sputum liquid erosion, will not rust, do not need oil, not easy to stick dust, maintenance, maintenance is simple and convenient, long service life.

4, no scratches, not subject to constant temperature conditions, can maintain the accuracy of temperature measurement at room temperature.

Order number	Specification (mm)	Measuring the perpendicularity of the face to the reference plane (um)		Measuring plane flatness or straightness (um)		Datum flatness or straightness (um)
		Precision 00	Precision 0	Precision 00	Precision 0	Precision 00	Precision 0
YS54-537	100×63×16	2	4	1	1	1	1
YS54-538	160×100×20	2	4	1	2	1	1
YS54-539	250×160×25	2.5	5	1	2	1	2
YS54-540	400×250×40	3.5	7	1	2.5	1	2
YS54-541	630×400×63	4.5	9	1.5	3	1	2.5
YS54-542	1000×630×80	6	12	2.5	5	1.5	3