Because the width is 19 inch, the rack that meets this requirement is sometimes called "19 inch rack". The basic unit of thickness is 4.445 cm and 1U is 4.445 cm. ..
The cabinets used in the early days were mostly castings or angle steel, which were connected or welded into a cabinet frame with screws and rivets, plus a cover plate (door) made of thin steel plate. This kind of cabinet has been eliminated because of its large size and simple appearance. With the use of transistors and integrated circuits and the miniaturization of various components, the structure of the cabinet is also developing towards miniaturization and modularization.
Extended data:
At present, more than 99% cabinet manufacturers have marked the U number of the cabinet on the standard installation column of the cabinet, which is convenient for users to install it correctly and quickly in the final installation. Not only practical, but also combined with modern technology.
classify
The general classification of 42U cabinets is:
According to the width, the 42U cabinet is 600mm and 800mm wide, and the depth is 600 mm, 800 mm, 900 mm, 960 mm, 1000 mm,1000 mm, 1200 mm, etc.
According to the actual demand: In addition to the actual size of 42U, the width and depth can be customized according to the actual demand.
Baidu Encyclopedia -42U Cabinet