The V-shaped marble frame is made of "Jinan Qing" marble material processed by machinery and finely ground by hand. Used in conjunction with a tablet to inspect the concentricity of various shafts, particularly for high-precision measurements of instruments, precision tools, and mechanical components.

Marble V-shaped frames can also be used for precision marking and assembly.

Marble V-shaped frame has the advantages of high precision, no rust, no magnetization, no deformation, and good quality. Can maintain stability under heavy loads and normal temperatures.

Due to its non-metallic nature, marble has no magnetic reaction and no plastic deformation. Its hardness is high, therefore it has good accuracy retention. In use, even if the marble V-shaped frame is bumped by heavy objects, at most a few stones will fall off.

Advantages: Made by hand precision grinding, it has the advantages of high precision, long service life, low deformation, no rust, no magnetization, no deformation, and good quality. Can maintain stability under heavy loads and normal temperatures. Marble V-block is a precision reference measuring tool made of stone material, which is an ideal reference surface for the inspection of instruments, precision tools, and mechanical parts, especially for high-precision measurement. Derived from underground rock layers, after billions of years of natural aging, the shape is extremely stable, and there is no need to worry about deformation due to conventional temperature differences. After rigorous physical testing and selection, the large marble material is finely crystallized and has a hard texture. Due to its non-metallic nature, marble has no magnetic reaction and no plastic deformation. Its hardness is high, therefore it has good accuracy retention. Even if it is bumped by heavy objects during use, at most a few stones will fall off. It is superior to precision measurement reference parts made of casting and steel, and can achieve high and stable accuracy. The V-shaped marble blocks produced by our company can still maintain their original accuracy after being stored for one year.