Cylinders are common geometric bodies, and through holes are channels in cylinders. In the fields of industry, architecture and design, cylindrical through holes are widely used, such as machine parts, pipes, reinforced concrete columns and so on. The position and shape of the through hole can not only make the cylinder more practical, but also beautify its appearance and improve the added value of the product.

There are many processing methods for cylindrical through holes, among which drilling, milling, drawing and sheet metal forming are the most commonly used. For different materials and process requirements, different processing methods can be selected. The accuracy and size of cylindrical through holes are very high. Generally, it is required that the accuracy of aperture and hole depth is less than 0.02mm, and the surface smoothness of the hole is above Ra0.4um.

Cylindrical through holes are widely used. In the field of automobile manufacturing, cylindrical through holes are widely used in brakes, engines, transmissions and other parts; In the field of architecture, cylindrical through holes are used to connect building structures, distribution boxes, etc. In the field of design, cylindrical through holes are used to make decorations, pull rods and so on. With the continuous progress of science and technology, the application field of cylindrical through-holes will continue to expand, bringing more convenience to people's lives.