Hand wrench ("meat grinder") for trucks. Auto Tools

The manual wrench is a powerful wrench that is used today to unscrew and twist various joints. However, unlike the traditional key, this device allows to significantly increase the torque, which facilitates the process of dismantling, for example, the same wheels on trucks. This tool can save drivers in situations where it is urgent to unscrew powerful connections.

Types and types of devices

The wrench for trucks is a tool for narrow application. However, the amount of work that can be done with it is quite impressive. There are several types of this equipment. So, according to the principle of action, they distinguish:

• Pneumatic;
• Hydraulic;
• Electric;
• Mechanical devices.

Pneumatic equipment has the most compact dimensions, as well as an average level of speed and accuracy. These models are indispensable in workshops and workshop.

Hydraulic tools have the highest efficiency, do not vibrate during operation, have a huge resource and high wear resistance. This is more a stationary equipment, which is to some extent their disadvantage. Huge dimensions make this device a purely professional tool.

Electric models - high-speed, with great accuracy, without vibration. There are network devices and batteries. All this equipment is very effective, but if you need to change the wheel on the road on a huge truck, then, alas, mobile electric models are beyond the power.

Tool for trucks

For problems on the road, the mechanical system is most suitable. Drivers call it "screwdriver-mincer". The nickname is a tool for its similarity to the famous kitchen tool.

With the help of this wrench, even the most difficult fasteners are easily untwisted. With all the advantages of power tools, the mechanical solution has become the most popular.

Purpose of the mechanical device

Any truck driver knows that the process of unscrewing the wheel nuts that attach the wheel to the hub is much harder and harder than twisting. You can install the wheel very quickly and easily. For this, a simple balloon key will suffice. If you need to remove it, then to unscrew the wheel nuts, you need to apply a long piece of pipe and the weight of the driver, since the nut is often almost tightly attached to the hairpin.

The reason for this lies in the corrosion processes and in the design features of the joint, or more precisely, in the thread profile. Between the nut and the bolt a small groove is formed, into which moisture freely penetrates.

Often attempts to remove the disc and unscrew unardiable wheel nuts lead only to the breakage of the studs and the need for more serious repair measures than it was planned. Especially suffer from this is trucks. Fasteners sour much faster, and these nuts on wheels are much larger. And to facilitate the process of removing and mounting disks on trucks, it is worthwhile to apply a mechanical wrench.

This tool has long been appreciated in the machine-building industry, on the railway, various construction works, but only recently began to be used for car repairs. In a very short time, this device was able to gain great popularity among drivers. And since it can be purchased at an affordable price, it is used by many drivers who travel the roads of the country.

How is the "grinder" for nuts

At the heart of this device is a special mechanism - a multiplier. It is designed to convert torque.

What is a multiplier? This is a planetary gearbox. He transforms rapid rotation, practically without applying effort on the part of the person, to a slow, but many times enhanced. The mechanism is actuated by means of a special handle - and indeed, the screwdriver "meat grinder" is called so not in vain.

The design of the instrument is nothing complicated.

It is based on a cylindrical body made of steel, in which a planetary gearbox is enclosed. On one part of the housing there is a drive shaft with a square at the end for the installation of the handle, on the other hand the output shaft is located - heads are mounted on it to work with fastening elements. In addition, the design has a stubborn lever - it helps prevent rotation during use.

Materials

Since in the process of unscrewing the wheel elements, the manual wrench feels heavy loads, then each part is made from high quality alloyed steel alloys. In addition, some components are made of hardened steels. This explains the large mass of the instrument - in its fully assembled form, its weight can be from 5 to 10 kg or more.

Equipment

The gaiter "chopper" can be purchased as a set. Sets are delivered in convenient plastic suitcases. The complete set can be a tool, a handle of a removable type, two or more heads, an adapter. Also, separately you can purchase different sets of heads that do not go with the tool.

Advantages of mechanical wrenches

Since the main part of this trucker's assistant is a reducer, this gives the solution several major advantages. Any nut will be twisted more smoothly. The main reason for breaking the studs and fixing bolts is uneven force when unscrewing. Enough even a small jerk to break the bolt. A manual wrench for trucks allows you to rotate it with an even effort, at low speeds, without sharp jerks and powerful jolts. With this device, you can forget about the problem of broken pins.

The driver can be less tired if he uses this equipment. In addition, you can save a lot of time, and therefore, reduce costs. The main drawback is weight, but many people put up with it. Let the heavy equipment, which facilitates the work, be better than the inefficient and traumatic balloon keys, various pieces of pipes and other improvised means.

Specifications

The main characteristic by which the "meat grinder" wrench is chosen is the ratio of the multiplier, as well as the torque that a specific model can produce. On sale there are models with a ratio of 1:56 and 1:58.

As for the torque, it's 2800 or 3500 Nm.

As already mentioned, the described autoinstrument is completed with two heads for the most popular nuts - 30, 32 or 32 and 33 mm. But there are other options - for example, 24 and 27, 32 and 38 mm. In general, the models are designed for use with heads from 24 to 60 mm.

Constructive differences

Depending on the design features, all wrenches are divided into several types. Thus, the thrust arm can be movable or fixed. In the latter case, it will move along the body, but at the same time it can be fixed in the desired position by means of a special mechanism.

On the device of the multiplier, a freight wrench with a bearing or with a bushing is distinguished. Instruments equipped with the first elements have an index "P" in their name. The price of these devices is higher, but they are characterized by a high level of reliability, durability and comfort in operation.

Models with bushings are simpler in design, not the same durability as the "grinder" equipped with a bearing screwdriver. The price is also low. You can buy the tool from 2500 rubles. Also, the models differ in the number of speeds. Devices with a ratio of 1:56 or 1:58 have one or two speeds. There is a reduced gear ratio 1: 3.

Two-speed wrench

High torque is only needed to break the nut from the bolt or the studs. Further use of the "meat grinder" is already unprofitable - the process moves slowly. If the nut succumbed, it is much easier to use the key.

Models that have two speeds are convenient in that the device can be reconfigured at high speeds and the nut will be twisted several times faster. This allows you to save significant time.

Receptions of use

It's easy to work with screwdrivers - everything is very intuitive and understandable even to those who encounter this for the first time. But there is one small subtlety to which you will have to get used. The handle rotates in one direction, and the head - in the other. If you rotate the knob clockwise, the head will rotate counter-clockwise - this must be taken into account during operation.

To get started, you need four simple steps:

1. Gather equipment.
2. The head is put on the nut.
3. The thrust arm is positioned closer to the nut.
4. Rotate the handle, and when the nut was able to break, you can reconfigure the mechanism for a smaller gear ratio.

In this tool there is nothing innovative, but it can greatly facilitate the replacement of the wheel on the road, save time, while not ripping the thread and not damage part of the hub.

So we found out what a manual wrench for trucks is and how it is used.