Cast iron cubes are usually suitable for the lineation and inspection of machinery parts’ parallelism, verticality, etc.

1. Before using, please wash the Cast iron cubes with gasoline, clean with gauze and check there is any rust, scratches, cracks, gouges, sagging, sand inclusion and foreign matter on their surface in case of influencing the measuring precision grade.

2. The working surfaces of cast iron cube are processed with high precision and keep perpendicular and parallel with each other. So when using, please place at the clean working platform.

3. After using, please clean and coat with rust preventive oil.

4. The Cast iron cubes can be divided into 3 classes: 1, 2 and 3. Precision grade 1 and 2 are inspection cubes, and grade 3 is lineation cubes.