Granite tri square is mainly used to measure the flatness, perpendicularity and straightness of the workpiece. The main mineral components of Granite tri square are fleeing stone, plagioclase, a small amount of olivine, biotite and trace magnetite, with black color, precise structure and electric code. After hundreds of millions of years of aging, the square has even texture, good stability, great strength and high hardness, which can maintain high precision under heavy load. Applicable to industrial production and laboratory measurement work.

Features and advantages of Granite tri square:

1. After long-term natural aging, the rock structure is even, linear expansion coefficient is very small, internal stress completely disappears, no deformation, so the accuracy is high.

2, good rigidity, high hardness, wear resistance.

3, not acid, alkali erosion, will not rust, do not need oil, not easy to sticky dust, maintenance, maintenance convenient and simple, long service life.

4. There will be no scratch, and it is not prevented by the constant temperature condition. It can also maintain the accuracy of temperature measurement at room temperature.

5, magnetization, measurement can be smooth movement, no stagnation astringency, not affected by moisture, the plane is good.

Granite tri square technical parameters:

Used for measuring parts, spindles of machine tools and various angles.