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Wrench classification and use skills

Source: Time:2020-04-15 13:52:52 views:

What is a wrench? A hand tool used to turn bolts, screws, nuts, and other threaded fasteners to hold openings or sockets of bolts or nuts.
What is a wrench? A hand tool used to turn bolts, screws, nuts, and other threaded fasteners to hold openings or sockets of bolts or nuts. A wrench is usually provided with a clamping handle at one or both ends of the handle to apply external force to the handle to turn the opening or sleeve hole of the bolt or nut. When in use, the bolt or nut can be turned by applying external force on the handle along the thread rotation direction.

Several wrench types are commonly used:


1. Solid wrench

A fixed size opening is made at one or both ends to screw a certain size of nut or bolt.

2. Ring spanner

The two ends have working ends with hexagonal holes or twelve holes, which are suitable for the occasions where the working space is narrow and the ordinary wrench cannot be used.

3. Dual purpose wrench

One end is the same as the single end solid wrench, the other end is the same as the ring wrench, and both ends turn the bolts or nuts of the same specification.

4. Adjustable spanner

The opening width can be adjusted within a certain size range, and the bolts or nuts of different specifications can be screwed.

5. Socket wrench

The utility model is composed of a plurality of sockets with hexagon holes or twelve holes and equipped with a handle, an extension rod and other accessories, which is particularly suitable for bolts or nuts with very narrow turning position or very deep depression.

6. Allen wrench

The L-shaped hexagon bar wrench is specially used for turning the internal hexagon screw. The model of Allen wrench is according to the size of opposite side of hexagon, and the size of bolt has national standard.

7. Torque wrench

When the bolt or nut is turned, it can show the applied torque; or when the applied torque reaches the specified value, it will send out light or sound signal. The torque wrench is applicable to the assembly work with clear provisions on the torque size.
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