Which compressor is right for the impact wrench. Mains voltage

A pneumatic impact wrench (air tightening of fasteners)

Compact and lightweight tool with compressed air supply. Has gained huge popularity in car repair shops, industry and household. Can produce impressive torque compared to its electric counterparts, yet is less prone to breakage thanks to its simple, monolithic mechanism. In this article we will tell you how a pneumatic wrench works, what the tightening adjustment is, and what you should pay attention to when choosing this tool.

Like all air tools, impact wrenches work with compressed air supplied from a compressor. By passing a hose connected to the impact wrench, air enters the unit and begins to spin the rotor blades that transmit the rotation to the spindle (stop), nozzle, and finally the fastener. The reverse function reverses the airflow in the tool, reversing the direction of the rotor so the nut can be unscrewed in seconds.

Impact wrenches can be impact or nonimpact type of wrenches. The impact mechanism in the impact wrench increases its torque, but it also increases the risk of tearing off threads or the bolt head. The percussive-torsional movement is created by a special hammer mechanism located in front of the spindle. Devices without an impact function often produce less rotational force, and are mainly used when working with fasteners up to 12 mm.

Going into detail, the pneumatic impact wrench can be designed as follows. Inside the tool body is the back plate, the cylinder with rotor and blades, the impact mechanism, the stop. On the outside of the body there is a start button, a connector for the compressor, reverse gear and the regulator (on most models).

to the present or future owners, with a material where we tell and show how to conduct maintenance and repair of the pneumatic nutrunner.

Air reservoir volume

Receiver is a metal tank used to store compressed air reserve.

The bigger the reservoir capacity, the less often the compressor will start up.е. Higher receiver volume reduces the load on the compressor and motor.

The downside of a large air tank is that it takes a while for the compressor to build up working pressure in it. If the capacity of the compressor is low and there is a pressure intake from a working tool, the pressure in the large receiver (and therefore the pressure at the compressor outlet) can take a very long time to build up. Therefore, a large receiver volume should be accompanied by a correspondingly large capacity and power.

An exception are those cases where a compressor is occasionally required to have a short but high output. For example, when using an impact wrench. it requires a capacity of 300 l/m, but if you connect it to a compressor, the capacity of 200 l/m with a large (50 l) air tank will be enough to start the wrench and work for a while.

How to choose a nutrunner for a tire fitting

Choosing an effective tool for the unscrewing of wheel nuts, you should first of all define the dimensions of the car, on which it will be used. Passenger cars suffices impact wrench with a torque of 200 Newton per meter, SUVs need a little more. 300-400 Nm, and the trucks fit the tool with a minimum of 600 Nm.

Few people want to often repair their wrench, and on this basis, everyone tries to choose a more robust and resistant to damage tool. The industry leaders are the pneumatic and manual wrenches. Next are cordless and cordless tools. The quality of the device largely depends on the manufacturer. A cheap Chinese impact wrench can break down faster than a cordless Makita or AEG. It is better to read the reviews and history of the brand beforehand than to be constantly repairing a bad tool.

Independence of the tool from the connection to the network or compressors. a definite plus, but if the area of application is limited to 10-20 meters, then a more suitable option would be stationary models. For active work in the garage or car repair shop, pneumatic and networked wrenches are ideal as they do not require constant battery change. For a long trip it will be better to take, cordless or more reliable, but less fast “meat grinder”.

Determining what nutrunner to choose for tire fitting, we all sooner or later come to the question of the price of this device. If you consider a pneumatic tool with torque reserve for light-duty tire service, all models have an average price tag of 6,500. A compressor suitable for this tool is on average 10,000. Total, a working tool with a hose and lubricator, will cost 18-20 thousand. A decent figure, but tool reliability and efficiency make up for this drawback. A corded tool, for the same purpose, will cost 5-6 thousand rubles less.p, and a cordless wrench at 7-8. A manual wrench will not be considered here, as it is more suitable for massive joints, and on cars instead of it can be easily used a normal cylinder spanner.

In the car repair shop, where the mobility of the tool does not play a serious role, the best option would be a pneumatic wrench. For household conditions in the absence of a compressor the network or battery type will be the best choice. On trips over long distances, drivers of heavy equipment, will be useful hand-held or good battery-powered wrench.

Impact wrench compressor for your garage

Despite the variety of models, it is not necessary for the conditions of the garage to choose a model of high performance and think about how it would fit in the garage. If the use of the compressor is limited to infrequent repairs, then it is necessary to base your choice on this information.

Read also: Motor overload protection

Compressor units come in:

Short repairs contribute to the choice of oil reciprocating compressors. They are the most common. With their duties such models cope completely and the price here always corresponds to the quality of the equipment offered.

How to choose a pneumatic wrench

October 5, 2015 Hand-held gasoline tool, electric-pneumatic tool

The pneumatic impact wrench is powered by an air compressor and includes an impact and rotating mechanism. The main parts of an impact wrench are:

• Plastic or metal housing with a handle and trigger has a nozzle for connecting a compressor hose.
• Rotor with blades and reversing mechanism forms a pneumatic motor that converts air pressure into rotary motion.
• A frame that holds two weighted metal rings called hammers and transfers the rotor’s rotation to the actuating stop.
• The cylindrical stop on which the exchangeable nut retainer head is mounted makes the nut rotate or shock-rotate depending on the rotation force.

Different models of impact wrenches

In addition to the basic pistol grip, the tool can be equipped with an additional detachable handle that can be fastened in different positions for easy holding.

How to choose a pneumatic impact wrench?

When choosing a tool, you should pay attention to the following indicators:

The presence of an impact mechanism

Not all impact wrenches have a hammer mechanism, there are simple devices with uniform rotor rotation. Impact devices create an impulse rotating action on the bolt to be unscrewed, which effectively loosens the bolt from the “stuck” place.

The mechanism allows for a significant increase in productivity in no longer than 5 seconds per fastener.

These tools are widely used in machine shops, vulcanizing centers, agricultural vehicle repair shops, aircraft maintenance bases and railroad depots.

How the air wrench works

Reversing mechanism enables the impact wrench to be used not only for disassembly work but also for assembly work on construction parts and assembly units. The impact wrench gives you the tightness you need without any major physical effort on your part.

No more need to tighten the fasteners after using the impact wrench. A set of interchangeable heads in various sizes is included with the tool. The more durable nozzles are made of cast steel and are available in black.

Compared to conventional white heads, they last longer and withstand the impact load better.

Pneumatic impact wrenches are better suited for tightening large fasteners, and impact wrenches are ideal for tightening fasteners to a precise torque. If you use them to tighten large bolts and nuts (24mm or more), they still need to be tightened by hand after use.

Rotor Speed

This parameter can have a value up to 8000 rpm.

Higher speeds can increase the speed and power of the tool, but great care must be taken when doing so, as small nuts and bolts can have their threads severed.

The rotor speed can be adjusted by slightly varying the pressure in the compressor. Do not turn the screws too high, since this would impair control of the tightening torque.

Turning torque

Parameter that depends on the power of the impact wrench. Low tightening torque causes fasteners to loosen quickly if subjected to alternating loads. An excessively high tightening torque causes overstressing of the thread, resulting in rapid destruction under load. Tightening torque values should therefore be chosen according to the requirements.

This wrench is designed for professional use. Its maximum torque is 5000 Nm

Tightening torque ranges from 30. 3000 Nm for various tool manufacturers. Operating torques between 300 and 2200 Nm are characteristic of pneumatic impact wrenches.

Tighten larger fasteners with a higher torque output, then select a larger impact wrench with a higher torque output. Tools with a minimum working torque of 100Nm are required for tire centers where rims are fitted and removed.

Variable torque wrenches are used in the automotive assembly shop, where different components require different tightening torques.

Spindle size

For fasteners with threads up to 25 mm in diameter, which can be found in passenger cars to a maximum, select a half-inch spindle.

If you want to tighten larger bolts with thread diameters of 25 to 32 mm, you need an inch diameter wrench, and for thread diameters up to 50 mm you need an inch and a half diameter wrench. The 4 characteristics of the tool are related to each other.

The higher the speed of the impact wrench, the higher the tightening torque it develops, so it is designed for larger fastener sizes and has a larger spindle diameter.

How to choose an impact wrench

To keep the tool efficient and to prevent premature tool failure, it is important to make sure that the tool is compatible with the air pressure source. There are two ways to do this, with working air pressure and air flow.

The ideal condition for effective operation of a pneumatic nutrunner is when the compressor pressure exceeds the working pressure of the tool by 2 bar and the air capacity is 1.2 to 1.3 times greater than the necessary air flow rate.

When these conditions are met, this ensures that the tool works flawlessly, and that its claimed performance is in line with the actual performance.

For example, we bought a pneumatic impact wrench with an operating pressure of 6atm. and the air flow rate of 7.5 liters / sec. Then a compressor generating 8 atm is needed to operate the tool.

with a capacity of at least 9l/sec. You should pay attention to the quality of supplied air.

It must meet those requirements that are specified in the tool’s instruction manual for moisture and oil content.

Key Features of Air Compressors

Regardless of device and operation, all compressors have five technical parameters:

• Performance. measured in liters per minute. The capacity is divided into: the output and the suction capacity. The latter is equal to the multiplication of the cylinder volume by the number of strokes per minute. Compressor output performance includes all losses associated with the entire process and is always less than the suction performance of 1. 1.5 times. For example: Suction capacity of an air compressor 400 l/min., then the real one will be 300. 340 l/min.
• Operating pressure. measured in kg/cm? i.e. atmosphere. Also in bar and psi. 1 bar=0.98 kg/cm. Pressure in psi. is the pressure in pounds per square inch. 1 bar=14.2 psi.
• Pressure tank volume. measured in liters. One of the most important indicators needed to paint a car.
• Electrical power consumption. Is measured in kilowatts.
• Working voltage 220v or 380v.

How to choose a pneumatic wrench

5 Oct 2015 Hand held gasoline tool, electric-pneumatic tool

Pneumatic nutrunners are powered by an air compressor and contain both impact and rotary mechanisms. The main parts of an impact wrench are:

• Plastic or metal body with handle and trigger has connector for compressor hose.
• Rotor with blades and reversing mechanism form an air motor that converts air pressure into rotary motion.
• A frame holding two weighted metal rings called hammers and transmitting the rotation of the rotor to the actuating stop.
• The cylindrical stop on which the exchangeable nut retainer head is mounted produces a rotary or percussive-torsional movement depending on the rotational force.

Wide variety of models of air ratchet wrenches

In addition to the basic pistol grip, the tool can be fitted with an additional detachable handle which can be clamped in different positions for easy holding.

Operating principle of the pneumatic nutrunner

The impact wrench can be connected via a nozzle to an air compressor at a pressure no higher than that specified in the instruction manual for the tool. When the trigger is pulled, compressed air guides the rotor blades in a rotary motion.

The frame and hammers transmit the rotor rotation to the stop and the nut or bolt is unscrewed or screwed into its seat.If great force is required to turn the nut, the stop does not rotate, and the hammers, when rotated, are deflected backwards and are engaged with the stop.

During the next revolution, the hammers gain inertia and hit the stop in the direction of rotation as they approach the engagement. Repeat the impact until the nut is turning. This impact wrench therefore makes it quick and easy to open and tighten tight screws and nuts.

Low weight of max. 2.6 kg allows for single-handed use.

By changing the air inlet channels on the rotor blades, the direction of rotation can be reversed, enabling the impact wrench to be used for both tightening and loosening bolts and nuts. Reversing the direction of rotation is achieved simply by turning the rotary knob to the desired position.

How the air impact wrench works

The reverse mechanism allows the impact wrench to be used not only for disassembly jobs but also for assembly of constructional parts and assemblies. Impact tightening of threads achieves tightness without great physical effort on the part of the operator.

No need for any checking torque after using an impact wrench. Includes a set of interchangeable sockets in various sizes. The more rugged, black-tin tips are made of cast steel.

Compared to conventional white heads, they last longer and withstand even greater impact loads.

Pneumatic impact wrenches are better suited for tightening large fasteners, and impact wrenches are ideal for tightening fasteners to a specific torque. If large bolts and nuts (24 mm or more) have to be tightened with an impact wrench, they need to be tightened more by hand afterwards.

Compressed air compressor for the impact wrench

To operate a pneumatic impact wrench it is important to choose the right compressor. If an air compression unit is purchased for personal use, the choice is limited to reciprocating machines. It is hardly advisable to buy the equipment in the garage at a price of 150 thousand. This is about the cost of a unit with a screw or spiral compressor unit of the desired capacity. Continued.

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Sort by: price price Expert Rating Expert Rating Power Supply Power, kW Power, kW Receiver Volume, l Receiver Volume, l Weight, kg

Compressor Type Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil Type Power 220V Power, kW 1,8 Frequency, Hz 50 Maximum pressure, Atm 8 Performance Inlet, l / min 320 Performance Outlet, l / min 208 Receiver Volume, Air reservoir location Horizontal, dB 97 Electric motor rotation speed, rpm 2850 Protection class of electric equipment, IP 23 Number of cylinders 1 Compression stage 1 Weight, kg 31 Rapid coupling (Rapid) Documentation 2439 Compatible with the tool:

Compressor Type Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil type Power 220V Power, kW 2,2 Frequency, Hz 50 Maximum pressure, atm 8 Performance Inlet, l / min 356 Performance Outlet, l / min 231 Receiver Volume, Noise level, dB 97 Motor speed, rpm 2850 Electrical equipment protection class, IP 23 System oil quantity, l 0,4 Number of cylinders 2 Compression stages 1 Weight, kg 35 Rapid coupling Documentation 9684 Compatible with the tool:

Type of compressor Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil type Power 220V Power, kW 2,2 Frequency, Hz 50 Maximum pressure, Atm 8 Performance Inlet, l / min 412 Performance Outlet, Capacity, l/min 267 Receiver Volume, l 50 Receiver location, horizontal Noise level, dB 97 System oil volume, l 0,2 Number of cylinders 2 Compression stages 1 Weight, kg 48 Rapid coupling Documentation 9250 Compatible with tools

Compressor Type Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil type Power 220V Power, kW 2,2 Frequency, Hz 50 Maximum pressure, Atm 8 Performance Inlet, l / min 356 Performance Outlet, l / min 231 Volume, Volume of the air tank, l 50 The air tank location: horizontal Noise level, dB 97 Motor rotation speed, rpm 2850 Electrical equipment protection class, IP 23 System oil quantity, l 0,4 Number of cylinders 2 Compression stages 1 Weight, kg 43 Coupling Rapid release (Rapid) Documentation 9668 Compatible with the tool:

Type of compressor Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil type Power 220V Power, kW 2,2 Frequency, Hz 50 Max. pressure, Atm 10 Performance Inlet, l / min 310 Performance Outlet, l/min 201 Air reservoir volume, l 24 Air reservoir location, horizontal Noise level, dB 97 Protection class of electrical equipment, IP 23 Number of cylinders 1 Compression stage 1 Weight, kg 33 Rapid release coupling Documentation 2895 Compatible with tools:

Compressor Type Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil type Power 220V Power, kW 2,2 Frequency, Hz 50 Maximum pressure, atm 8 Performance Inlet, l / min 400 Performance Outlet, l / min 260 Receiver Volume, Receiver location Horizontal tank Noise level, dB 97 Motor rotation speed, rpm 2840 Electrical equipment protection class, IP 23 Number of cylinders 1 Compression stage 1 Weight, kg 38 Rapid coupling Documentation 2441 Compatible with the tool:

Compressor Type Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil type Power 220V Power, kW 2,2 Frequency, Hz 50 Maximum pressure, Atm 10 Performance Inlet, l / min 360 Performance Outlet, l / min 234 Volume of the receiver, Tank location Horizontal, dB 97 Noise level Motor speed, rpm 2850 Electrical equipment protection class, IP 20 System oil quantity, l 0,4 Number of cylinders 2 Compression stages 1 Weight, kg 62 Coupling Rapid release (Rapid) Documentation 10441 Compatible with the tool:

Compressor Type Piston compressor / Air / Electric Drive Belt type lubrication Oil type Power 380V Power, kW 2.2 Frequency, Hz 50 Maximum pressure, Atm 10 Performance Inlet, l / min 360 Performance Outlet, l / min 270 Receiver Volume, Volume of the air tank, l 50 The air tank location: horizontal Noise level, dB 95 Shaft speed, rpm 1420 Oil volume in the system, l 0,72 Overhaul life, h 7500 Number of cylinders 1 Compression stage 1 Weight, kg 69 Connection 1/4″ threaded Documentation 1360 / 1361 Compatible with tools:

Type of compressor piston compressor / Air / Electric Drive Belt type lubrication Oil Type Power 380V Power, kW 2.2 Frequency, Hz 50 Maximum pressure, atm 10 Performance Inlet, l / min 360 Performance Outlet, l / min 270 Receiver Volume, Volume of the air tank, l 50 The air tank location: horizontal Noise level, dB 95 Shaft speed, rpm 1420 Oil volume in the system, l 0,72 Overhaul life, h 7500 Number of cylinders 1 Compression stage 1 Weight, kg 69 Connection 1/4″ threaded Documentation 3263 Compatible with tools:

Type of compressor Piston compressor / Household / Air / Coaxial / Electric Drive Direct lubrication Oil Type Power 220V Power, kW 2,2 Power Frequency, Hz 50 Maximum pressure, Atm 8 Performance In, l/min 412 Output capacity, l/min 267 Receiver Volume, l 100 Receiver location, horizontal Noise level, dB 97 System oil volume, l 0,2 Number of cylinders 2 Compression stages 1 Weight, kg 55 Quick disconnect coupling (Rapid) Compatible with tools

Tips for using the air wrench

To extend the life of an air tool, it is advisable to heed some tips from professional craftsmen.

• Do not drop tools.
• Be sure to keep air tools away from areas where they can be bumped by vehicles.
• To increase the tightening power, do not overpressure the system. This leads to fast wear and tear of the tool.
• Do not hold the impact wrench under load for a long time, as it will damage the hammer mechanism quickly. If a stuck nut or bolt is not loosened within 5 seconds, you should stop the machine and replace it with a more powerful one. It is also recommended to use for problem bolts penetrating liquids, which are in the arsenal of any car owner: gasoline, antifreeze, kerosene, diesel fuel, brake fluid. It is best to apply a special liquid, such as WD-40, to the threaded joint.
• Do not store the tool near fire, or in a hot, humid location.

If you follow these simple recommendations, then your tool will be an effective assistant in carrying out labor-intensive operations, will last a long time and justify the money invested in it.