How to choose a torque wrench for a car enthusiast to carry out independent work? After all, different manufacturers produce this tool with different operational, functional, ergonomic and cost indicators. Moreover, these indicators depend on the design of the tool, the technologies and materials used, and the reputation of the manufacturer.
To answer these questions, it is advisable, at least in general terms, to familiarize yourself with the typical designs of torque wrenches, operating features and the main manufacturers of this tool.
Types of torque wrenches for cars
There are several types of devices:
- Arrow is the most common type. It is characterized by low cost and simple design. However, in terms of technical characteristics it is inferior to other models. The error is 10%, the maximum tightening level is 280 N.m. Switch options are used for light routine work.
- Click - with a preset maximum, which is triggered when the tightening is too strong. The error is 3-5%, the tension force is from 40 to 360 N.m. The devices are used in domestic or industrial environments.
- Electronic - characterized by better performance. The error does not exceed 1%. There is an electronic scale reflecting the degree of tightening.
Specifications and Features
You can study the parameters of devices using the table:
| Tool type | Error | Ratchet | Sound indication | Double action | Working in hard-to-reach places | Adjustment |
| Switch | up to 20% | — | — | + | — | absent |
| Snap | 4% | + | + | optional | + | Once every 12 months |
| Electronic | 1-2% | + | + | + | + | not required |
With preset torque
This is the simplest type of instrument possible. Their peculiarity is that they can only work with one tightening force parameter. The preset torque allows you to not use a regulator. Of course, the user will not be able to independently set the force level, but this is not only a disadvantage, but also an advantage, since this increases the service life of the tool. The device is highly specialized.
Which one is better in design and execution?
4 types of keys are considered the most reliable; it is worth studying the main characteristics of each of them. This will help you understand which device is best to choose, taking into account the specifics of the work.
Limit type adjustable
The product is characterized by the simplest design. The user sets the torque limit. When this value is reached, a click appears, indicating the need to stop tightening. The handle is equipped with an adjustment mechanism and a scale. More expensive models are characterized by high measurement accuracy. When purchasing such a key, you should choose devices with a removable square. In this case, you can install any heads.
Switches
The device operates on the principle of a dynamometer built into the body. The device is equipped with an indicator arrow located in the upper part. There is also a square for installing attachments or heads.
The tool has low measurement accuracy, so it is not advisable to use it when repairing a car.
An arrow key is best used in construction or other similar industries.
Digital
This device is equipped with many additional components. There is a built-in memory, the device can be connected to a computer. A wide range of settings allows you to choose the desired option. The design of the key includes a square, a handle, and a working part. The rod contains a mechanism that calculates torque and sends data to the screen. Digital devices are calibrated automatically or manually.
Key adapter
The device is equipped with a mechanical drive connected to a ratchet. The adapter has a head or nozzle. To configure the device, buttons and a monitor are used. The adapter is accurate and versatile, which is considered its main advantage.
How to use a torque wrench?
Depending on the type of tool, the operating instructions may differ. For example, click-type models should be set to the minimum value at the end of work to weaken the adjustment mechanism. We will describe the main nuances of how to properly use a torque wrench, which are suitable for any model of device, regardless of type:
- It is not recommended to use this tool to unscrew nuts, otherwise you may lose settings or break the mechanism.
- Do not set force values beyond the setting limits.
- Clean the tool delicately, without completely removing the factory lubricant.
- When the lock nut is tightened, it is prohibited to rotate the handle.
- If the torque wrench has been stored without use for a long time, do not try to immediately set a large force on the scale; first check it in operation at a small torque value.
- It is prohibited to use pieces of pipe as extensions and to use a torque wrench as an impact tool.
- It is recommended to install only standard attachments.
- Throwing the tool on the ground or hitting the torque wrench is prohibited.
- The products are stored in a dry, clean place, and sent for long-term preservation in a lubricated form.
- During operation, the spring mechanism weakens, so periodically the keys should be checked independently or sent for calibration.
Rating of the best torque wrenches
The top 10 includes tools with optimal technical characteristics. Each device has received the best user reviews.
KING TONY 34223-1A
The wrench is used to tighten different types of fasteners. When using this device, a click is heard. It indicates that the desired degree of tightening has been achieved. This way the car enthusiast will know exactly when to stop using the tool.
The device has the following technical characteristics:
- presence of a ratchet - yes;
- mechanism type - 24 teeth;
- division price - 0.1 N.m;
- case material - steel;
- weight - 700 g;
- nozzles are missing.
The main advantages of the model under consideration are:
- convenient, easy to read scale;
- ease of use;
- reliability and accuracy that do not change during long-term operation of the device;
- the presence of a ratchet;
- convenient storage case.
Some users complain that the sound is too quiet, indicating that the puff limit has been exceeded. It can't always be heard. In addition, the device requires precise adjustment, without which the performance of the clamp will deteriorate.
Berger BG-12 TW
A high-quality German key copes well with basic tasks. It is equipped with a durable body with chrome-plated surfaces. The device showed good performance in a popular test. The universal square is compatible with all types of attachments. The measurement error is no more than 4%.
The advantages of Berger BG-12 TW include:
- stable operation even during long-term use;
- compatible with any heads;
- presence of a ratchet, holder and key;
- scale built into the body;
- clear Russian-language instructions;
- good build quality.
Car enthusiasts consider the lack of rubberized inserts to be a disadvantage.
ALCA CR-V 450,000
The manufacturer of this tool is the German company HEYNER. The model is equipped with additional extensions that make it easier to work in hard-to-reach places. The durable chrome-plated body can withstand high loads.
The mechanical regulator, which operates on a general principle, is easy to set up. The limiter and ratchet function stably.
ALCA CR-V 450,000 has the following technical characteristics:
- square size for mounting heads - 1/2 inch;
- length - 45 cm;
- material - steel;
- weight - 1.8 kg;
- operating range - 28-210;
- country of origin: Taiwan;
- ratchet, case and extension.
Heyner 40-200 Nm
Tools of this brand are chosen by most craftsmen. The device has a simple but multifunctional design. The case is equipped with an adjustment mechanism, rubberized inserts, and a scale with a lens. A plastic storage case is included.
The advantages of Heyner 40-200 Nm include:
- high build quality;
- comfortable handle;
- extended operating range;
- Russified instructions;
- expanded set of functions;
- convenient container.
KMSh-140 NIZ 2774-140
The inexpensive device is characterized by advanced equipment and ease of use. The body is made of durable steel - a durable, reliable metal. The device is small in size and weight. There is no ratchet or dielectric coating.
Positive qualities are:
- low cost;
- ease of use;
- availability of a storage container;
- hull strength.
Some users complained about purchasing a defective tool. Therefore, when purchasing, pay attention to the arrow, which should be near zero.
HAZET 5120-2CT
All devices of this brand are characterized by minimal measurement error. HAZET 5120-2CT is a device with a wide range of tightening levels. This model is often purchased by drivers of cars and SUVs. It is compatible with attachments for loosening large nuts. HAZET 5120-2CT has only positive reviews from car enthusiasts who note the good build quality, durability and accuracy of the device.
Gross
The best device of this brand is a dynamometer adapter that connects to a ratchet or square. The device has a steel adapter, a built-in display and adjustment buttons. The error does not exceed 2%; another advantage is the presence of light and sound indication. The operating range is 40-200 N.m. There is a built-in screen for monitoring torque. The kit includes a rubber case.
Kabo Tool ARD150
The products of this brand meet European quality standards. All keys are made from reliable materials - steel with the addition of chromium, vanadium and molybdenum. The series includes devices designed to work with different types of fasteners. Kabo Tool ARD150 has a wide operating range - from 20 to 210 N.m. The handle has buttons for setting and locking. The error is no more than 3%.
Top Tools 37D105
It is considered the simplest device of this type. The handle is equipped with a scale that helps you track the moment of amplification. The device is often used in everyday life.
The advantages of Top Tools 37D105 are:
- ease of use;
- comfortable handle;
- good gain indicators.
The disadvantages are considered to be low measurement accuracy and a difficult to read scale.
JTC-4933
Patented technologies are used in the manufacture of this model. The device is equipped with a convenient glass scale with a magnifying effect. The body is made of durable steel for long service life. The operating range is 20-100 N.m. The kit includes a large number of attachments placed in a durable plastic case.
How to choose
The choice is based on the above parameters. Most importantly, you need to understand what range is needed for the work and how significant the work being performed is. Let's say, when working with cars, you need to choose some models, and when working with trucks, others. It all depends on the size of the threaded connection for which it is selected. Although it must be said that many models are suitable for use in passenger cars, commercial vehicles, and trucks. True, they are used for different units and components.
Criterias of choice
A torque wrench is purchased taking into account:
- Torque. If the tool will be used frequently, it is recommended to take several products with different parameters. When a device is purchased for a particular type of work, they focus on the tightening indicator that is required in such cases.
- The size of the square. In this case, take into account the type of fasteners for which the selected device will be used.
- Display method. Electronic options emit light and sound signals. When purchasing a simpler device, you will have to adjust the tightening yourself.
- Measurement error. The lower the percentage, the better.
- Device dimensions. It is not recommended to buy compact devices. Their operating ranges are limited, and it is more difficult to unscrew fasteners with such keys.
- Case material. Tools must be made of durable metal. This is the only way to firmly tighten the bolts or nuts.
- Handle material. Metal elements are considered more durable. However, such a handle constantly slips out, which complicates the work. The best option is metal products with rubberized inserts.
- Ease of reading the scale.
- Direction of movement. This point is worth considering for left-handers, since most instruments are designed for the right hand.
- Ratchet included. Not all devices are equipped with such components. Therefore, it is worth checking out the completeness of the device before purchasing.
- Reset button location. Ease of use is taken into account when evaluating this parameter. The location should prevent accidental pressing during operation.
- Availability of attachments. The more components, the better. Moreover, each attachment increases the cost of the set.
- Storage case. A case is optional, but it helps keep your tools handy.
- Manufacturer's warranty. Its presence makes it possible to replace the device in case of premature failure.
- Presence of service centers in the city. This allows the user to access instrument settings.
- Maintainability. If there are no spare parts on sale, you should refuse to purchase the product.
- Country of origin. Preference is given to cheaper Russian models. German and Japanese devices are considered to be of the highest quality.
Answers to frequently asked questions
Until recently, a torque wrench was considered a tool of professional mechanics who used it in car repair shops. Many people thought that there was no need to have one in their home or garage, but in vain.
Luckily, those days are a thing of the past and there are now a number of excellent torque wrenches on the market designed for home rather than professional use.
Naturally, some people still have questions about this extremely convenient tool. We will try to answer them.
Question: Why buy a torque wrench?
Answer: There are two reasons to buy a torque wrench - safety and longevity of the parts. By allowing you to set the torque, these tools provide a degree of precision when tightening nuts and bolts.
This may seem unnecessary when you're fixing a broken glove box lock, but it's extremely important when it comes to the nuts that hold your wheels in place, secure your brake system, or secure your bike's handlebars.
When working with a regular wrench, you have to tighten the nuts by eye, i.e. guess the amount of tightening force.
If you repeatedly tighten it with too much force, the threads on the bolt will eventually become damaged, requiring replacement or causing the part to fail completely at the most inopportune moment.
Question: How often should I calibrate my torque wrench?
Answer: These instruments are precision and usually have a manufacturer's calibration certificate indicating that the measurements can have an error of 4% or less.
Professionals believe that if this figure exceeds 5%, the instrument requires calibration.
As a general rule, calibration should be done approximately every 3,000 repetitions if you use the key regularly, or approximately once every 6 months if you only use it occasionally.
Question: Is there a universal torque wrench?
Answer: Yes and no. As you already noticed in our review, torque wrenches have different tightening torques, different sizes, are made of different materials and cost differently.
As a general rule, it's a good idea to buy one wrench that you think can handle most of the work, whether it's repairing or servicing your truck, car, SUV, lawn mower, or other household appliances.
A model with a wide torque range is suitable for this.
If you have bicycles or other equipment with more fragile components, it might be a good idea to buy a torque wrench with smaller torque increments so you can tighten fasteners with more care and precision.
comparison table
The table helps you compare the characteristics of the best torque wrenches.
| Name | Manufacturer country | Type | Peculiarities |
| Gross | Germany | electronic | Built-in adapter, adjustment buttons |
| Alca CR-V 450000 | Germany | auto | Includes case, adjustment elements, durable case |
| Bergr BG-12 TW | Germany | clicky | Versatility, chrome-plated body, small error |
| Heyner 40-200 | China | lever | Adjustable setting ring, reliable design |
| JTC 4933 | Russia | ultimate | Glazed scale, magnifying effect, high precision |
| Hazet 5120-2CT | Germany | electronic | Multifunctionality, advanced technical capabilities, good build quality |
| Kabo Tool ARD 150 | Taiwan | electronic | Durable steel housing |
Tips and tricks
A properly selected torque wrench helps you perform car repairs easily and efficiently. If you need to purchase the ultimate option, choose BERGER BG-12TW. With a limited budget, switch models are purchased, for example KMSh-140 NIZ 2774-140. If the cost of the product is not important, the best option is a device of a special design - JTC 4933.
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Device Features
Before deciding how to choose a torque wrench, you need to understand that such a device is a professional tool that has a built-in dynamometer. This device is suitable not only for repairing vehicles, it is also actively used during construction, equipment design, industrial production and in other areas where torque is important during assembly.
On any equipment of this type you will see a special scale that shows the current force value. As a result, you can easily determine the current torque and, if necessary, change the force.
It is worth noting that choosing a torque wrench is a fairly important process, because the correct assembly and ease of repair work depend on it.
Here you need to build on parameters such as:
- design features of the element (we’ll talk about the types of models a little later);
- type of scale (models may have an electronic display, mechanical scale, etc.);
- quality of the material (remember that you are not buying an ordinary sensor, but a tool that will have to work with). But there is no need for super-strong steel with a hardness of 50 HRC; models with a parameter of 35-40 HRC will be sufficient;
- price (as a rule, models are quite inexpensive, so you shouldn’t look for expensive options);
- operating features. For private use, mechanical options are suitable, while for work in a car service, professional models will be required;
- accuracy and reliability. The more balanced the characteristics, the easier it will be to work with the tool. In this case, there is no need to purchase expensive equipment in which the torque reaches 250-300 Nm. For most tasks, 200 Nm models are sufficient.
Video review about a torque wrench for a car:
