Torque Wrench Multiplier – How Does It Work?

VD August 08 2021

At one point or another, we have all tried to change the flat tire. But 80-90% of car owners around the globe are still using an ordinary wrench and a scissor jack to change tires, even when technology such as torque multiplier is available.

The history of an ordinary car wrench is as old as the history of the car itself. The thread tire was first commercially used as a tire in a motor car in 1905. Up to our days, an ordinary car wrench is always included in the tire kit of the vehicle.

Torque multiplier wrench technology is becoming popular. These wrenches were commonly used by heavy-duty vehicle owners as they make the job of tire changing relatively easy. But now, some top-of-the-line wrench manufacturers have introduced designs that are suitable for sedans, too. This revolutionary step has opened new doors of business for torque wrench multiplier manufacturers.

Which one is better: An ordinary wrench or a torque multiplier wrench?

Both tools are doing a great job. Standard wrenches have been used by car owners around the world for many decades, so it seems that introducing something new isn’t a great idea. On the contrary, the torque multiplier tools can convert tire changing into an effortless and quick activity.

An ordinary tire-changing wrench comes with a pre-designed bolt face. This bolt face is already compatible with the bolts used to hold the tire in place. Talking about the overall appearance of an ordinary wrench, there’s nothing significant about it. Some wrenches may come with multiple bolt faces but they do the same job. The handle of the wrench is kept long enough to give maximum grip options which make the job easier.

On the other hand, a torque multiplier wrench creates a completely different experience compared to an ordinary wrench or a breaker bar. The entire equipment is made up of multiple sets of gears placed inside a cylinder box. At one end of the box, there are numerous bolt adjustment options. There’s also a place portion where the axel bar can be attached. But the majority of people don’t know how to use a torque multiplier properly.

How to use a torque multiplier: a brief guide

In terms of operations, a torque multiplier is quite different in function than a breaker bar. A breaker bar allows the user to open an axel/lug nut by applying brute physical force on the pivot bar. Due to this force, the axel bar rotates counter-clockwise, and the nut opens.

While working with a torque multiplier tool, you need to move the axel bar to and fro a couple of times, and the nut will automatically open. All of this happens without any added effort.

When the axel bar is moved to and from, it acts as a lever system. A lever system that’s operating the complex gear system enclosed within the cylinder box. Each gear inside the box can magnify the amplitude of force applied to it as a source. In other words, a slight pressure provided by the user through the axel bar reaches the first small gear. This gear then amplifies the power supplied and passes it on to the next gear in line. 

By the time the force reaches the end of the line at the bolt phase after passing through the last gear, the torque generated is impactful enough to do the job without any effort on your side. This is why a torque multiplier wrench can help you change your car tire with ease.

Is using a torque multiplier effective?

It is very helpful, but no matter how cool or easy to use a torque multiplier wrench is, there’s always going to be a question about the need for these tools. Most car owners don’t need a torque wrench very often. An ordinary wrench or a breaker bar is more than enough to loosen up and remove the axel nuts easily when needed.

But when driving a trailer or a heavy-duty SUV vehicle, then torque multiplier tools can prove to be quite handy. Even in this case, there is one minor issue that you will still be needed to cope with. Based on the price comparison between a torque multiplier wrench and a breaker bar, most of us will prefer the extra effort associated with a breaker bar instead of buying an expensive torque multiplier.