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Adjustable Wrenches Use Guide and Safety Tips

Oct. 12, 2022

What is an adjustable wrench

An adjustable wrench is also called an adjustable spanner. The opening width of the adjustable wrench can be adjusted within a certain range. It is a tool used to tighten and loosen nuts and bolts of different specifications. An adjustable wrench is a common tool for maintenance workers because its opening can be adjusted within a certain range, which is very convenient to use. Not only can be used for standard metric bolts and inch bolts, but also some self-made non-standard bolts.

The inventor of the adjustable wrench was the Swedish Johan Petter Johansson, who invented the adjustable wrench in 1892.

Adjustable Wrenches Use Guide and Safety Tips - PROBUILT

Uses of adjustable wrenches

Adjustable wrenches are widely used tools for a variety of professional and hobbyist assembly, plumbing, and DIY applications around the world. The potential uses for adjustable wrenches are almost endless, but essentially they all perform the same basic task. Their key role is to enable the tool used to securely tighten or loosen many different sizes of fasteners, rather than having to change to a different non-adjustable wrench size every time a new size/diameter is encountered. 


On most adjustable wrenches, the smaller lower jaw can be moved backward or forward, widening or narrowing the gap between it and the fixed upper jaw depending on the size of the fastener you need it to fit tightly around. Most adjustable wrenches fit both metric and imperial fastener gauges and are almost always single-ended tools.

How to use an adjustable wrench

First, turn the screw to open the wrench. With the removable jaws of the wrench open, put in the nut or impression you must secure. Make sure the jaws are wide enough to fit the nut or bolt. The opening in the jaws of the wrench should be slightly larger than the nut.
Now, place the open jaws on the nut, then use the opening of the jaws to hold the nut firmly and start turning the screw.
Remember to turn the wrench clockwise to tighten it. To loosen it, you must turn it counterclockwise. You can continue turning it until the job is done. Loosen the screw and remove the wrench from the nut.

Adjustable Wrenches Use Guide and Safety Tips - PROBUILT

Safety Tips for Adjustable Wrenches

Pulling the wrench

No matter what kind of wrench, The best use effect is to pull if you must push. At the same time, use only the palm of your hand to push and keep your fingers extended to prevent the bolt or nut from suddenly loosening and touching your fingers. To obtain the maximum torque, the direction of pull must be at right angles to the wrench handle.

Adjusting the right size

When using an adjustable wrench. The specifications should be chosen according to the size of the nut. When using it, hold the handle with your right hand. The more you lean back, the more effort you can save in wrenching. When wrenching a large nut, a larger torque is needed and the hand should be held near the end of the handle. When pulling small nuts. Need to use less torque, but the nut is too small and easy to slip. Therefore, the hand should be held close to the head. And you can always adjust the worm wheel and tighten it to prevent slippage.

The jaws are fixed in the original position

When using the adjustable wrench. The movable jaws of the wrench should be made to bear the thrust and the fixed jaws to bear the tension, that is when pulling the wrench. The movable jaws face inward: the force must be uniform so as not to damage the wrench or deform the angles of the bolts and nuts. Cause slippage and accidents.

Avoid exerting too much force

Avoid exerting too much force when using the wrench. Otherwise. It may cause slippage and bruise the human body.

Don't use extension rods or tubes indiscriminately

If you use extension rods carelessly, it is easy to exceed the rated torque specifications of the tool, which can quickly lead to serious damage or injury

Check for wear or damage

Loosening and tightening bolts and nuts can be a daunting task. That's why you want your tools to be in good condition at all times.

Take the time to inspect your adjustable wrench for any damage or wear before you use it. Some may have worn down to the point where they can no longer handle the tough job.