A wrench is a commonly used tool for mechanical components, with a wide range of applications, suitable for multiple fields such as machining, repair, and installation. There are many types and specifications of wrenches, which will be introduced in the following text.
1、 Classification of wrenches
- Classified by purpose: ordinary wrench and special wrench.
A regular wrench is a common type of large and small head wrench, which can be selected according to the size of the bolt and has a wide range of uses.
Special wrenches include open-end wrenches, ring wrenches, cross wrenches, live spring wrenches, single head wrenches, double head wrenches, universal wrenches, etc. Due to their different structures, they are suitable for specific operations. - Classified by structure: open type and sleeve type.
Open end wrenches are relatively simple, with only one adjustable opening, suitable for tightening bolts with large space.
A socket wrench is composed of a sleeve and is suitable for tightening bolts with small space. It is also divided into two types of structures: straight and curved. - Classified by material: Iron and alloy steel.
Iron wrenches are relatively cheap, but their hardness is low and they are not durable enough, making them only suitable for some simple household operations.
Alloy steel wrenches have longer work efficiency and service life due to their good material and high strength, and are also easier to maintain.
2、 Specification and model of wrench
The specifications and models of wrenches are classified according to their applicable diameter sizes, and the inner diameter labeling method is commonly used. Taking the commonly used open-end wrench as an example, the specification and model are marked as: 6 mm，7mm，8mm，9mm，10mm，11mm，12mm，13mm，14mm，15mm，16mm，17mm，18mm，19mm，20mm，21mm，22mm，23mm，24mm，25mm，26mm，27mm，28mm，29mm，30mm， Each number in the above specifications represents the width of the opening. For example, 10mm represents an opening width of 10mm, which can be used to tighten or remove bolts or nuts.
In general, there are many types and specifications of wrenches, so it is important to choose according to your own needs. At the same time, whether it is a regular wrench or a special wrench, attention should be paid to safety during operation to avoid accidents caused by improper operation.
