The cast iron inspection box is made of gray cast iron, usually a square of 100 to 500 millimeters, with a dimensional accuracy within 0.01 millimeters. The relative planes are parallel to each other, and adjacent planes are perpendicular to each other, with an allowable error within 0.01 millimeters.

The inspection square box belongs to the cast iron square box product category. Cast iron square boxes are divided into inspection square boxes, marked square boxes, magnetic square boxes, and T-shaped groove square boxes.

There are also many types of square boxes. Some workpieces are clamped onto a square box with a C-shaped chuck, and flipping the square box can draw all perpendicular lines at once. In order to facilitate the clamping of various workpieces (including shaft workpieces), a square box with a clamping device and V-shaped groove can be used. A square box is a concrete hollow cube made of cast iron with six working faces

The inspection box is mainly used for checking the parallelism and perpendicularity of components, as well as supporting workpieces during marking. It is generally a cube with the same side length.

Purpose of inspection box:

Square boxes are mainly used for inspecting and marking the parallelism, perpendicularity, and other aspects of components. A square box is a hollow cube made of cast iron with six working faces, one of which has a V-shaped groove. The environmental conditions for square box calibration are normal temperature and humidity.