Electric Torque Wrench

D-Flex Type Hydraulic Impact Wrench | Bolting Technology ITH Hydraulic Impact Wrench D-Flex | ITH Bolting Technology Company Overview Adaptive hydraulic cassette wrench. One cylinder of hydraulic impact wrench

Short review

  • Adaptive cassette hydraulic wrench. One cylinder of the hydraulic wrench is capable of driving up to 8 cassettes with different sizes of internal hex.
  • The QUICK-AND-GO quick-change mechanism, which is installed between the cylinder and the cassette, ensures high speed and ease of manual cassette replacement. No additional replacement tool is required.
  • The compact size and low weight of the tool is achieved through a reduced head radius and low profile design. All of this ensures ease of use.

The reduced head radius of the D-Flex nutrunner is a significant advantage in any application. In addition, the D-Flex hydraulic impact wrench is specially designed to meet the following standards for pipe flanges:

  1. Asme B16.5 (pipe flanges, class 300 to 2500)
  2. Mss SP-44 (steel pipe flanges, class 150 to 900).

D-Flex Type Hydraulic Impact Wrench | ITH Bolting Technology

electric torque wrench

Examples of using the D-Flex hydraulic impact wrench

The above photo shows the bolted connection of the main bearing of the wind turbine to the generator. In this case, the distance between the bolts as well as the distance from the center of the bolt to the wall are limited.

Thanks to its reduced head radius, the D-Flex hydraulic impact wrench can handle this technical challenge. The hydraulic nutrunner is supported by a stop on a nearby bolt. This eliminates bending stresses on the tool.

The ITH hydraulic impact wrench type D-Flex 5 tightens the bolts of the ropeway steel structure. It is powered by an ITH Hydro-DAX 18 pumping unit. The remote control makes it easy to operate by one person. The dual hose system allows for high speed bolting.

The reduced radius of the cassette head of the hydraulic wrench is an advantage in any application where space is limited.
In addition, the ITH D-Flex hydraulic impact wrench is specially designed to meet the following flange standards:
1.Asme B16.5 (pipe flanges, class 300 to 2500)
2.Mss SP-44 (steel pipe flanges, class 150 to 900)
In the above photo, the D-Flex 5 wrench is mounted on a MSS SP-44 steel flange, class 600.

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Low profile hydraulic impact wrenches type D-Flex can be optionally equipped with the ITH ALPHA system, which is designed to tighten bolts to a certain angle value. To this end, the D-Flex can easily be fitted with an ALPHA sensor block (red housing in the photo). The data cable is used to connect the sensor unit to the ALPHA control unit, which is installed on the ITH hydraulic pump unit.

Contact your local ITH representative for more details on the method for torque tightening bolts to a specific angle. We will be happy to support you.

Working principle of pneumatic impact wrench

This device has two main power units. An air motor, which converts air pressure into rotation of the head with a nozzle, and a hammer assembly. The device operates according to the following simple principle:

  1. There are two channels in the body of the pneumatic wrench. To turn on the tool, a button is pressed to open the valve. Pressurized air flows through the first channel, rotating the turbine.
  2. Professional pneumatic impact wrenches and amateur tools have a reversing switch. To change the direction of rotation of the turbine in the opposite direction, air is supplied by the valve through another channel.
  3. The impact mechanism is triggered when the main torque is not enough to loosen the thread.
  4. A pneumatic torque wrench is needed to work with fasteners of different diameters to prevent thread stripping. With the help of the limiter, the locksmith sets the maximum torque value.

How does a pneumatic impact wrench work?

Outwardly, this tool resembles a hand drill with a handle and a barrel, but instead of a chuck, it is equipped with an attachment for clamping nuts. Let’s describe in general terms an approximate device of a pneumatic wrench:

  • Pneumatic motor;
  • Impact mechanism;
  • Spindle;
  • Reverse mode switch and tightening torque regulator;
  • Starting device;
  • Fitting for connecting the compressor device;
  • Valve.

How to choose a pneumatic impact wrench?

Be sure to purchase an air tool that is compatible with the compressor in terms of operating pressure and air flow rate. The equipment is important, it is better to choose wrenches in cases with additional consumable accessories. Consider other nuances that affect the correct choice of a pneumatic impact wrench:

  1. The hammerless tool is suitable for working with sensitive mechanisms, where no great effort is required and maximum accuracy is required.
  2. Impact devices will help out when unscrewing rusted, old connections, and also when working with large fasteners.
  3. The ratchet mechanism is good for light loads, it is often used in angle air wrenches.
  4. The tightening power is the most important nuance. The most popular parameter is 30-3000 Nm, the maximum values ​​are chosen based on specific conditions.
  5. For a car service, a 1/2 ”spindle is suitable. For work with threads up to 25 mm. 3/4 “, for heavy equipment (threads over 50 mm). From 1 to 1.5”.
  6. Weight of the device. Hands get tired faster with a heavy tool, but a too light air wrench tightens the nuts worse with great effort.
  7. Composite body is lighter, stronger, more practical.
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Electric impact wrench. What are the advantages of the tool?

Not so long ago, a wrench was considered as a purely specific tool, used mainly at service stations, or rather, tire fitting, for removing and installing wheels, and nothing more. The need to have it in the home master’s kit was not expected at all. Meanwhile, the principle underlying this tool allows you to unscrew such threaded connections, which are sometimes beyond the power of even the most powerful keys with huge levers. It is the untwisting that is the main advantage of the impact wrenches.

But, first of all, about what they are and why the main wrenches in our article are electric.

Choosing a wrench drive

According to the principle of obtaining a rotational motion, all wrenches are divided into:

  • Mechanical;
  • Pneumatic;
  • Hydraulic;
  • Driven by an internal combustion engine;
  • Electric.

We will deliberately not consider the first 4 subspecies as the least justified in terms of home use. Although, for those who have trucks and (or) compressors in garages on the farm, mechanics or pneumatics would be quite useful. But this is such a small number of users as a percentage of their total number that a detailed examination of these devices is, at least, little justified.

The device of most wrenches resembles an electric drill or screwdriver, only without a chuck.

Instead, the working shaft is equipped with a half-inch (sometimes smaller) square with a locking ball for the installation of hardened impact heads.

And the lines of modifications of impact wrenches from all their manufacturers are quite long. Here is just one of the Russian manufacturers with its series of manual pneumatic and electric impact wrenches.

But first. About the principle of the instrument.

Micro impact. The basis of the principle of operation of an electric wrench

If we compare the power of a wrench and a screwdriver with their ability to screw in and out self-tapping screws, then a 300-watt nutrunner sometimes copes with these tasks much better than a kilowatt screwdriver.

But the point is not at all in the power of the electric motor of the tool, but in its design and principle, based on the use of micro-impact.

Namely: rotation from the electric motor is transmitted to the shaft and flywheel of the impact device. When resistance to rotation arises on the working shaft. When tightening or unscrewing, the impact mechanism turns to a certain position and breaks down, producing a shock. He’s not strong, but there are many of them. It is a series of these blows (about 2000 / min) that allows you to achieve incredible performance (the average tightening torque is sometimes not limited to 600 Nm). And this is at a power of no more than 300. 500 watts. And this blow is not at all the same as that of the same perforator or hammer drill. There it is directed along the axis of the working shaft, and at the wrench. Perpendicular to it.

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In part, the operation of an impact wrench resembles the situation with emergency unscrewing of stuck nuts using a traditional tool. Pour abundantly on such a WD-40 nut or kerosene, which is almost the same, or Coca-Cola, which is no less effective and wait until it turns off. You put a powerful head on a wrench with a long handle, and a pipe on it to increase the lever, and the nut does not come off. The only solution remains. To use an open-end wrench (or better. An “asterisk”) and a hammer.

It is exactly what we do with these tools that resembles the work of a wrench, but very remotely. This is an extreme measure, allowing you to rip off a stuck nut or bolt, but it is fraught with rupture of the threaded connection or separation of the bolt head. Also, with a not very tight fit of the key on the hardware or poor-quality material from which it is made, deformation of the edges of the fastener is possible, which is always fraught with additional problems.

This almost never happens with a wrench. The main thing is that the compliance of the tool characteristics with the parameters of the threaded connection is observed.

Pneumatic impact wrench 1/2 Yato YT-09528

Heavy-duty wrenches for trucks.

Models for unscrewing truck wheel nuts feature a reinforced головки “or 1” impact socket and greater weight. For example, the Yato YT-0960, with a torque of 2600 Nm, weighs 16 kg and has a longitudinal layout with an additional handle in the front.

When operating with such a tool, it should be convenient for a car mechanic to position it at the required height and move it vertically, positioning the head in space when putting it on the nut.
Turning the suspended wheel with one hand, the other holds the air impact wrench by the front handle. It is set in the center of gravity, like the Intertool PT-1104, and then the tool does not tilt forward or backward.

Yato YT-09524 pneumatic impact wrench