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The problem of choosing a compressor for a wrench is one of the most significant for the master. The pneumatic wrench is powered by an air compressor and contains a firing and rotation mechanism.

How to make a good choice?

Before buying a compressor for impact wrench it’s important to figure out what your exact needs are so you can find the perfect fit. You need to determine:

  • where you will use the compressor
  • compressor parameters
  • types of compressors

The main characteristics of the compressor

Power (kW, horsepower)

The power consumption of the compressor is greater than that specified in the catalogue. Pick up the device with a small margin for this parameter (approximately 30%).

Pressure (роunds per square inch-R)

It is recommended to choose a compressor with a pressure of 90 lb/kV.

Performance (L3/min, CFM)

The volume of air compression per 1 minute (cubic fut per minute) depends on this indicator. It is necessary to choose models which productivity is 2 times higher, than the wrench is capable to spend.
The air flow rate should be multiplied by 0.25-0.3 (utilization factor) firing mechanism.

Receiver volume (l)

The receiver is a metal tank for the accumulation of compressed air. The usual tank capacity is 30 gallons. Receivers equalize pressure drops that occur when the compressor unit is switched on / off, contribute to the removal of condensate.

Compressor dimensions (mm, LxWxH)

There are 2 types of compressors: stationary and portable compressors. For jobs that require operator movement, you can choose compressors with small dimensions, for example, 400×230х370 and a handle for transfer. More powerful are equipped with wheels for mobility.

Weight

For carrying out the mounting work it is convenient to have a lightweight compressor with a weight of 4-5 kg. Semi-professional and professional compressors usually weigh from 25 kg.

Noise level (dB)

Buy compressors with sound insulation. It reduces the level of noise 85 decibels (dB) to 68 dB.

Thermal condition

The presence of a cooling element will allow the compressor to work without overheating.

Types of compressors

Compressors are available in several different types: screw, piston (oil and oil-free), coaxial and belt. Each type of compressor has its advantages and disadvantages.
A compressor for a wrench will be your assistant in the garage, during repair job, in the construction work.