For many users, the problem of vibration of rotating screw and reciprocating compressor is a nuisance. Whether you are working in a small workspace or in a large industrial environment, it is important to understand the cause of compressor vibration and identify the problem if a problem occurs in the unit. The following compressor vibration troubleshooting guide covers the 10 most common causes of this problem.

Common causes and potential solutions for air compressor vibration

The cause of compressor vibration is due to multiple internal and external causes. To detect the source, compressor vibration analysis of various parts and components must be performed both inside and outside the machine. Check the following 10 areas for possible vibration sources in the air compressor

1.Mounting bolt

One of the main causes of air compressor vibration is defective mounting bolts. If the mounting bolts are not properly fixed or stable, the compressor will lack the stability required for operation without shaking or jitter. If the compressor vibrates and you suspect that the problem is due to mounting bolts, check for the following symptoms:

Loose: If the mounting bolts are loose, the air compressor cannot be supported sufficiently. As a result, the compressor vibrates when the cycle is active. Even if only one of the bolts is loose, the overall balance can become unstable. If the bolt appears to be loose, tighten or replace as necessary.

Concavity and convexity: If the bolts are uneven, the compressor does not have enough support, whether the machine is mounted on the ground or mounted high. Check the individual mounts to make sure that each makes good contact with the underlying surface.

Misalignment: If the mounting bolts are not properly attached to the compressor, it does not matter whether they are fully attached to the surface because the compressor itself does not have sufficient support. Make sure that each bolt is evenly aligned with the compressor.

Shaking surface: Shaking or trembling surfaces cause the compressor to vibrate, especially when active. Make sure that the surface does not shake when subjected to pressure. If the compressor is attached to a table, make sure that each table leg is in good contact with the ground.

Uneven surface: If the mounting surface is uneven, you will need to move the compressor to a completely level and flat surface. Inspect the mounting surface for bending or tilting and move the compressor to another surface area if necessary.

Isolating the problem as a mount problem is easier to fix than you originally imagined.

Mounting bracket

To stabilize the compressor and eliminate vibration, it is necessary to plant the foundation firmly on the surface. In addition, all parts of the compressor must be properly installed and secured correctly. If you miss any of these details, the compressor can easily vibrate. If you can hear vibrations, check for the following problems:

Too loose: If the mounting bracket is loose, the air compressor will not be properly supported. If the bracket appears to be loose, recheck the mounting attachment and tighten if possible or replace if necessary.

Inadequate fixation: If the mounting bracket is not properly installed, it can cause problems for the compressor. Insufficient support can cause the compressor to shake when active or worsen over time, resulting in more damage. Check the fasteners to make sure they are securely attached and not loose or half-open.

Weak support: A major problem can occur if the bracket is mounted on an unstable surface. In order for the compressor to function properly, a solid and solid support is required. If support is weak, move the setup to a sturdy location.

Rust: If rust occurs on the mounting bracket, it will inevitably lose strength and a firm grip. Rust spreads rapidly and the brackets can be damaged. Therefore, rusted mounting brackets must be replaced immediately.

Fastener wear: If the fastener is worn or the threads are peeled off, the compressor will not be properly secured by the mounting bracket. To fix this problem, you need a new fastener.

Do not use a pure and simple one unless the compressor is securely installed in its place.


In reciprocating air compressors, ambient air is drawn into the compression chamber by the crankshaft. If there is a problem with the crankshaft, the compressor will tend to display various performance problems including vibration. Crankshaft vibration is often due to the following problems:

  • Bent: If the crankshaft is bent, it will not function properly. The crankshaft can be half open due to constant stress in the compressor. If you suspect that the problem is in the crankshaft, you should remove the case and see if the crankshaft is actually bent.
  • Rust: If metal parts rust, they will not function as intended. Rust causes the brittleness, dullness, and weakness of metal parts, all of which are bad for parts placed for critical mechanical functions. If the crankshaft is rusted, it must be replaced with a new one.
  • Clogged: Clogged components can be a nuisance to the internal mechanism of the air compressor, especially if the part in question is as important as the crankshaft. If one or both ends of the crankshaft are clogged, refer to the instruction manual for a photo of proper alignment. Unless you are skilled in compressor maintenance, this issue may require professional assistance.
  • Malfunction: If the crankshaft does not function in any way, the problem can appear with many strange movements including vibration. If the crankshaft moves too fast, too slow, or is inconsistent, it will probably need to be replaced.

Crankshaft problems can be difficult, but can be easily corrected if the problem is identified correctly.


The belt is one of the most important parts of an air compressor. Each belt is in place to adjust the tension and speed of the corresponding parts moving in the compressor motor. If the internal tension is not adjusted properly, the compressor may vibrate. Compressor belt problems are usually due to the following issues:

  • Overtightening: The purpose of the belt is to adjust the tension. If the belt is too tight for the function at hand, the tension will not be adjusted properly. As a result, the motor function is too rigid and the compressor can vibrate. If the belt is too tight, it is probably too short for the part in question.
  • Loose: Loose belts do not adjust the speed and tension of the corresponding parts in much the same way that overtightening can be a problem. In some cases, the belt stretches and loses elasticity. If the belt is loose, the movement of the parts may be too fast or loose, and the compressor may vibrate. In that case, a tighter belt is required.
  • Dullness: The belt must retain rubber-like properties to provide sufficient elasticity. If the belt becomes dull and hardened, the ability to adjust the speed and tension of the corresponding internal parts may be lost. Check the tension of the compressor belt to see if it is too hard to work properly.
  • Cracks: If the rubber becomes dull and hard, the belt will slowly crack. If the belt is cracked, replace it immediately. A cracked belt can easily break at any time and cause many other performance problems.
  • Snap: If the belt is already snapping, the compressor is larger and can vibrate vigorously. If you notice such symptoms, turn off the compressor immediately and check the internal components. If the belt is broken, you can identify the main problem.

Fortunately, the belt problem is one of the simplest symptoms to solve with an air compressor.


Air compressor pulleys and flywheels are interdependent. If the pulley or flywheel is misaligned or damaged, neither will function properly. As a result, the air compressor may vibrate due to pulley / flywheel problems. Check the following hazard signs when inspecting pulleys.

  • Too loose: If the pulley is too loose, the flywheel movement cannot be adjusted correctly. To see if looseness is a problem, pull the pulley and see if the pulley expands easily. If it seems to slip off, replace it with a harder pulley.
  • Too stiff: If the pulley is too stiff, it will inevitably restrict the flywheel from moving at the correct speed. This extreme tension can easily cause the compressor to vibrate. Pull on the pulley to see if it has enough elasticity.
  • Rigidity: In some cases, the pulley is the right size, but the elasticity of the rubber is lost. If you feel the pulley, check whether it feels like rubber or hard, and replace it if necessary.
  • Cracks: Like cracked belts, cracked pulleys are very troublesome for air compressors. If you notice that the pulley is cracked, it is a matter of time before you hear a complete click and the pulley element fails. If there is a crack, replace the pulley immediately.
  • Broken: Pull once

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