Bosch nutrunners: varieties and features of operation

An impact wrench is a device that allows you to fix threaded connections without the use of physical efforts of the worker. They are used at tire service stations, car services, in assembly shops and other areas where threaded connections are constantly used.

In this article, we will consider the popular models of impact wrenches manufactured by Bosch, namely their model range and operating features.

Wrenches can be pneumatic or electric. The first is powered by compressed air from the compressor, which flows through a hose located on the side of the handle. The flow of compressed air drives the shaft and the attachment, which is attached to the nut. It has several power modes and a reverse function for changing the direction of rotation. Wrenches can be divided into cordless, mains, impact and pneumatic.

One of the world leaders in construction tools, Bosch offers the following types:

• rechargeable shock;
• pneumatic dynamometric;
• pneumatic pulse.

Each model has its own uniqueness. For example, of Cordless Impact Wrenches GDX 180-LI Professional positioned by a single impact wrench with a double bit holder with functions: screwing, screwing and drilling, while GDX 18 V-EC Professional - Universal Impact Wrench with extended service life. GDS 14.4 a V-LI Professional is currently the first cordless model of the pulse type 14.4 volts with flexible battery system.

The first two models are similar to each other (for example, voltage 18 volts, clamp, almost the same maximum torque), however, the first model is characterized by a higher shaft speed (rotational speed up to 2.800 rpm) and an improved cooling system.

The GDX 18 V-EC Professional boasts a more powerful motor, high precision, which prevents over-tightening of the threaded connection and damage to bolts or studs. A more ergonomic design gives an advantage in use.

Consider two Bosh 1/2 Professional models of different types of pneumatic impact wrenches - one is a torque wrench, the other is an impulse one. Located in the same price segment, but with different technological characteristics.

Pneumatic impulse wrench 1/2 Professional has a maximum torque when tightening the connection 310 Nm, idling speed 7,000 rpm, air consumption under load up to 8.5 l / s, weight according to EPTA 2.3 kg. A pneumatic torque wrench 1/2 Professional has the same indicators (respectively): 60 Nm; 160 rpm; up to 8 l / s; 1.3 kg.

The common feature of these models is the type of cartridge for attachment of nozzles - an external square with a diameter of half an inch, with the ability to change the direction of rotation. For all nutrunners, the instructions for use are approximately the same, however, it is recommended that you familiarize yourself with the application for use offered to the device.

Direct the jet of compressed air in the opposite direction from yourself (for pneumatic models) and never at other people - a directed jet of compressed air can cause injury. Protect hoses from kinks, narrowing, solvents, and sharp edges... Do not make physical contact with grounded surfaces; there is a risk of electric shock when using cordless impact wrenches. It is not recommended to use the device if you feel unwell - when coordination of movements or severe weakness is impaired, and it is strictly forbidden to use the instrument while intoxicated.

Before switching on, remove the chuck maintenance tools located in the rotating part of the device. Always check the integrity of the compressed air hose or batteries... In the event of a faulty start of the mechanism, do not work with the device.

At work with the cordless wrench, use only batteries that are compatible with this model and recommended by the manufacturer... Try to exclude contact of the battery with sharp and smooth metal objects that can short-circuit the poles, it is better to use a rubberized substrate.

An overview of the Bosch GDS 14.4 cordless impact wrench, see below.