What is a wrench? Classification and usage of common wrenches

A wrench is a commonly used tool in installation and repair. However, some users still have difficulty in classifying for proper and effective use. Let Tnhelearning.edu.vn immediately refer to the common wrenches in this article!

What is a wrench?

A wrench is a familiar hand tool in machine repair, mechanics, car repair garages, … often used to turn bolts or nuts without using a screw gun. Common materials for making a wrench are steel, vanadium, chromium, alloy or other metal.

The product holds and rotates nuts, bolts, pins and threaded components. The wrench can also turn and tighten a variety of bolts and screws, thanks to the ability to adjust the size and narrow width of the jaw, also known as the clamp.

Types of wrenches

There are many types of wrenches, so it is difficult to distinguish them from inexperienced or beginner users. Depending on the function, size and brand, wrenches are classified differently.

Functionally

• Ordinary wrench :

Ordinary wrenches are commonly used wrenches, not only used in industry, mechanics, and manufacturing, but also used to repair and assemble household items. The wrench is composed of a movable jaw , a fixed jaw and an adjustment roller .

In particular, the roller helps to adjust the size in the jaws on the wrench to help the 2 jaws be tightened or loosened nuts and bolts. When using, you can adjust the correct size of the nut by turning the roller . At the same time, you rotate the right direction of the wrench, making the wrench more durable.

• Tooth wrench :

This type of wrench has many different designs such as: ordinary tooth wrench , hexagonal tooth , horizontal wrench , … Tooth wrench is composed of parts such as movable clamp , fixed clamp. Mounted with handle and adjustable locking knob .

The wrench has the ability to hold the tool, tighten it very well thanks to the jaw of the wrench with thick serrated teeth. At the same time, the jaw is also highly flexible, combined with a ruler to help adjust the width of screws or round pipe details easily. The serrated wrench is suitable for repairing pipes.

• Chain wrench :

The chain wrench is made up of a handle , an incisor, and a chain . Chain wrenches are rarely used on the market, it is mainly used in the removal and installation of large cylindrical pipes or maintenance of large machines.

According to size

• Mini wrench : It has a small size of only about 4-6 inches , suitable for turning small screws from 10 inches down . The wrench is light in weight, so it is simple to use, easy to store and does not take up space.
• 250mm wrench : Weighs about 0.5kg , the body is compact and easy to hold, applied to repair or install machines in daily life.
• 300mm wrench : Made of a hard alloy, solid, strong jaw, hard to bend, so it is used to hold or clamp a fixed object. At the same time, the wrench has an adjustment screw with more than 25% of the torque to help adjust the size.
• 500mm wrench : Used to disassemble or open water pipes because of its large size. You can use this wrench to open large round screws that cannot be opened by other common types.

By brand

• Knipex wrench :

This is one of the famous brands with more than 138 years of experience. The company’s hallmark is the manufacture and production of top-quality wrenches through strict control over every aspect of the design.

All Knipex wrench products are made in Germany, so users can rest assured when choosing, because the design is aesthetically pleasing, the materials meet the input standards.

• Irega wrench :

Irega wrenches is a Spanish brand established in 1960 , specializing in the exclusive production of a variety of different wrenches. With abundant and experienced human resources, Irega has brought to customers quality products that meet the world’s leading standards.

Most of its products are made in Spain , ensuring a high reputation. Irega wrenches are widely used in life such as turning nuts on motorcycles, bicycles, other household appliances, high voltage electrical environments, …

• Fujiya wrench :

Fujiya wrench is a famous brand from Japan established in 1923 . The company has many years of experience in the manufacturing industry, producing hand tools and wrenches.

Fujiya wrenches are commonly used to repair machines and disassemble items. Products are not only popular in the country but also famous in countries around the world.

How to use some common wrenches

There are many different types of wrenches, so the use of wrenches is also very different.

• Normal wrench : The usage is quite simple, you just need to turn the screw to adjust the mount, let those 2 clamps tighten with the nut. However, you need to rotate in the right direction, using force to pull towards the body more easily and safely.
• Tooth wrench : As mentioned above, tooth wrench is used to adjust the pipe. You just need to open the jaw, put the pipe in the wrench mouth so that the tooth wrench makes 3 points contact with the pipe, clamp it tightly and process.
• Wire wrench and chain wrench : You tightly wrap the wire, chain the wrench on the object to be manipulated and exert a pulling force, due to the bending curve can increase or decrease the opening diameter easily, withstand the pulling force. High.

Some notes when using wrenches

In order to ensure the correct, effective and safe use of the wrench, there are a few things to keep in mind when using a wrench:

• Absolutely do not use a hammer to close the wrench : You must not use a hammer or any other object to apply a strong force to the wrench, because it may cause the wrench and the nut to be damaged or deformed.
• Do not use push, pull force : If you use strong force, the wrench will easily slide out, causing an accident for the user. Instead, you use traction to help take initiative when manipulating and ensure high safety.
• Do not create more force by extending the tool : The wrench handle should not be extended with the iron pipe for convenient turning, increasing the opening torque. This way will break the wrench, causing unexpected problems, because the wrench has been designed with a balanced force.
• Do not use a wrench that has been changed parameters : Many users bought the wrong wrench size, so they adjusted the size to increase or decrease the mount. However, the wrench with the wrong parameters will not ensure good work efficiency and endanger the user.
• Do not put the wrench in a place with too high temperature : High temperature can easily change the wrench’s hardness, metal structure and reduce product durability, affecting your work efficiency.
• Careful storage : Store the wrench carefully in a cool, dry place and check it periodically to ensure user safety and improve product life. If the wrench is bent, cracked or severely worn, it is easy to cause an unexpected accident during use.

Above is an article about what a wrench is, its classification and how to use common types of wrenches. Hopefully from the above advice, you can choose to buy a wrench and use it properly. Any questions, please leave a comment below!