How to choose a wrench

　　How to choose a wrench

A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to twist bolts, screws, nuts and other threaded openings or hole fasteners that hold bolts or nuts. A good wrench allows us to manually It is more convenient and faster when working. So, how to choose the right wrench?

　1. Common classifications of wrenches

1. Dumb wrench

There are openings of a fixed size on one or both ends, with an opening width of 6~24mm, suitable for disassembly and assembly of bolts and nuts of general standard specifications.

2. Hook wrench

Also known as a half-moon wrench, it is used to twist flat screws with restricted thickness.

3. Begonia wrench

It has working ends with hexagonal holes or 14-corner holes on both sides, which is suitable for situations where the working space is narrow and ordinary wrenches cannot be used.

4. Hexagonal wrench

L-shaped hexagonal ball wrench, specially designed for twisting hexagon socket screws.

　　2. Wrench purchasing tips

1. Choose a wrench according to the material

The material of the wrench determines its durability and strength. Generally, high-quality wrenches are made from high-carbon steel or alloy steel, which provide better strength and durability.

2. Choose a wrench according to the opening size

Select the required opening size wrench and ensure that the opening size of the wrench matches the size of the bolt or nut. For example, use a No. 6 wrench for a No. 6 nut to avoid slippage or damage caused by using an inappropriate wrench.

3. Choose a wrench according to the usage scenario

Different usage scenarios require different types of wrenches. For example, in automobile maintenance, commonly used wrenches include ring wrenches, socket wrenches, adjustable wrenches, etc.; in heavy industry or construction, large ratchet wrenches or impact wrenches, etc. may be required. Therefore, choose the appropriate wrench type according to the specific usage scenario.

4. Choose a wrench based on weight

The weight of the wrench is also a factor to consider. Wrenches of 800g-2000g are usually stronger, but being too heavy may cause fatigue; wrenches of 100g-300g are easy to carry and use, but may not be strong enough. Choose the appropriate weight according to actual needs.

5. Choose a wrench based on brand reputation

Choose a wrench from a well-known brand with a good reputation, and you can use it with more confidence. At the same time, choosing to purchase through formal channels can ensure the reliability of product quality and after-sales service.

　　3. Key knowledge about wrenches

1. Usage steps

①Installation wrench

Insert the wrench square tenon into the socket of the corresponding size, and then insert the sleeve into the bolt or nut head.

② Apply force

Apply force evenly in the clockwise direction. When you hear a “click” sound or feel the wrench releasing force, the set torque value has been reached.

③Remove the wrench

When tightening long bolts or nuts such as oil pipes and the sleeve cannot work, the open head needs to be replaced. Press down the positioning pin and apply force in the direction of release to remove the wrench head. Insert the selected open end of the corresponding size into the wrench rod and rotate it so that the positioning pin pops into the small hole on the wrench head for positioning.

2. Maintenance

①Cleaning

The wrench will be contaminated with dust, oil and other dirt during use and needs to be cleaned regularly. You can clean the wrench with soapy water or a neutral detergent, then rinse it with clean water and dry it before storing it.

②Lubrication

For some wrenches made of special materials, they need to be lubricated regularly to maintain their flexibility and service life. Special lubricants or lubricants can be used for lubrication.

③Inspection

Regularly check the integrity of the wrench. If any damaged or severely worn parts are found, replace or repair them in time.

3. Correct storage

Wrenches should be stored in a dry, cool and ventilated place to avoid moisture, exposure and corrosion. Wrenches that have not been used for a long time should be maintained and inspected regularly to ensure that they are ready for use at any time.

4. Frequently asked questions about wrenches

1. What are the common problems with wrenches?

Some problems may occur during use of the wrench, such as bolts and nuts sliding, wrench damage, etc. These problems can be caused by using an inappropriate wrench size, incorrect size or shape of bolts or nuts, uneven force, etc. You should pay attention when using the wrench to detect and solve these problems in time.

2. How to choose a suitable wrench?

Choosing the right wrench is the key to using the wrench correctly. The appropriate wrench should be selected based on factors such as the size and shape of the bolts and nuts, the needs of the job, and the working environment. For example, for small-sized bolts and nuts, you can choose a small dumb wrench or a torx wrench; for hexagonal bolts and nuts, you can choose an hexagonal wrench, etc. At the same time, you also need to pay attention to choosing wrenches with reliable quality and good brand reputation.