The socket wrench is composed of multiple sockets with hexagonal holes or dodecagonal holes, and is equipped with various accessories such as handles and connecting rods. It is especially suitable for tightening bolts or nuts with very narrow positions or deep depressions. Therefore, the socket wrench is made of bolts or nuts, while the bolt or nut system in China is metric, so the socket wrench is made of metric. The difference between metric sleeve and English sleeve is that metric sleeve is designed in millimeters, while English sleeve is designed in inches. The metric system is widely used in China. The metric system is an international standard unit, which is used all over the world. The English system is an idiom of the British people. The British industrial revolution was earlier, so it spread widely.
Extended data
socket spanner
The socket wrench is composed of multiple sockets with hexagonal holes or dodecagonal holes, and is equipped with various accessories such as handles and connecting rods, which is especially suitable for tightening bolts or nuts with very narrow positions or deep depressions.
Main applications
If the nut end or bolt end is completely below the connection surface, and the diameter of the concave hole cannot be used for an open-ended wrench or a adjustable wrench and ring wrench, use a socket wrench. In addition, due to the space limitation of bolt parts, only socket wrenches can be used.
A socket wrench is generally called a socket wrench: it consists of a plurality of sockets with hexagonal holes or dodecagonal holes, and is equipped with a variety of accessories such as handles and connecting rods, and is especially suitable for screwing bolts or nuts with very narrow positions or deep depressions. Sleeves can be divided into metric and English. Although the concave shape of the casing is the same, the outer diameter and length are designed according to the shape and size of the corresponding equipment. There is no uniform regulation in the country, so the design of sleeves is more flexible and meets the needs of the public.
Generally, socket wrenches are attached with a set of socket heads of various specifications, as well as rotary handles, connecting rods, universal joints, screwdriver heads, elbow handles and so on. Used for inserting hexagon nuts. The socket head of the socket wrench is a concave hexagonal cylinder; Wrenches are usually made of carbon structural steel or alloy structural steel. The head of the wrench has a specified hardness, while the middle and handle parts are elastic.
To lengthen
There are two reasons for lengthening: first, it is convenient for you to reach hard-to-reach places; The second is to lengthen the arm of force, so that you can use the same force and torque. You can easily remove some tightened screws.
manufacturer
The existing domestic socket wrench manufacturers are concentrated in Zhejiang, Shandong and other provinces, and a large number of manufacturers represented by Taiwan-funded or Taiwan-funded enterprises are focusing on the domestic market. For example, Jin Tuo Hardware Tools, the largest socket wrench manufacturer in China, is a typical factory representative, and the leading enterprise represented by Jin Tuo has promoted the progress and development of the whole industry.
There are also some excellent manufacturers in China who keep innovating and gradually improve the technology of socket wrenches. For example, Huafeng Giant Arrow Tool, the most innovative manufacturer in China, has obtained a national patent on the surface treatment project of socket wrench.
Reference source: Baidu Encyclopedia-Socket wrench