Open-end wrenches are one of the more used tools in life and production. Open-end wrenches are hand tools that use the principle of levers to turn bolts, screws, nuts, and other threaded fasteners that hold the openings or sleeves of bolts or nuts. Wrenches are usually made of carbon or alloy structural steel. Open-end wrenches usually have openings or sleeve holes for holding bolts or nuts at one or both ends of the shank. When used, an external force is applied to the shank along the direction of thread rotation to turn the bolt or nut. Next, let's take a look at this tool through some pictures of open-end wrenches.
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　　 Open-end wrench pictures
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　　 Factors to consider when choosing an open-end wrench
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1. Materials
The materials of the wrenches are basically made of carbon steel and chrome vanadium steel. You can choose materials with high chrome vanadium steel labels and relatively good quality.
2. Tolerance range
Each nut has a model, so when you need to unscrew, you must choose the corresponding wrench, and the opening of the wrench should be properly enlarged so that you can quickly unscrew the nut, which requires the size of the opening or the torx.
3. Torque and hardness
A high-quality open-end wrench requires a combination of hardness and toughness. Only if the two fit well together, then the life of the wrench will be longer.
4. Punching
The punching opening of the open end wrench should be rounded, smooth and smooth, and there should be no burrs or knife marks on the inner wall of the hole. The handshake should be rounded and free of burrs, otherwise it will affect the user experience.
5. Surface treatment
There are many surface treatment methods for open-end wrenches, among which watermark fog treatment is the best, and matte fog surface treatment will have small differences. In fact, when buying a wrench, you can also judge whether the surface treatment is based on the above specifications and the quality of the trademark Well, the trademarks and specifications of high-quality wrenches are very clear and the fonts are even.
6. Thickness
The thickness of the wrench with the same specification will be smaller, the lighter the weight, the more comfortable the user will be, so the quality is also better.
7. Style
There are many styles of open-end wrenches, and each production process is also different. You should know the use of the corresponding specifications when purchasing, in order to prevent the use of the wrong style and delay in production.
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　　 Notes on the use of open-end wrenches
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1. The wrench should be level with the flat surface of the bolt or nut to prevent the wrench from slipping and hurting.
2. Do not add a sleeve extension arm to the end of the wrench to prevent damage to the wrench.
3. The wrench cannot be struck with a steel hammer. The wrench is easily deformed or damaged under impact loading.
4. Do not mix metric wrenches with imperial wrenches to avoid slipping and hurting the user.
The above is an introduction to friends about the pictures of open-end wrenches, the factors to be considered when selecting open-end wrenches, and the precautions for using open-end wrenches. Wrench manufacturers should strictly control the quality so that they can be trusted by consumers. After consumers buy professional open-end wrenches, they also need to maintain them during use so as not to reduce their service life.
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