Why Pneumatic Cylinders Fail – and What to Do About It

Why Pneumatic Cylinders Fail – and What to Do About It

Anything pneumatic air cylinder framework is indicated for a specific application, the plant specialist can guarantee ideal execution by knowing where to search for issues and noticing proper investigating conventions. New specialized improvements and progressively modern gear refinements command a more engaged investigating exertion for plant designers to head off issues that can prompt margin time and hardware harm or disappointment. In any case, through thorough preventive upkeep and investigating projects and knowing where issues can emerge, pneumatic cylinders can be continued to run at ideal execution levels while keeping up with the greatest usefulness. 

Pneumatic cylinder disappointment regularly results from five unique circumstances: side-load mounting, tainting, absence of grease, noticeably off cycle rates and activity in the abundance of part restricts.

1 – Side-load mounting

Since a valve can move, the basic evaluation of its productivity isn’t the point at which its position is fixed, yet when it shifts. To guarantee the greatest working execution, cylinder pole side-load mounting ought to stay away because cylinders are explicitly intended for push-pull stroke activity. Because of the idea of side-load mounting, in which turn mounts travel in a curve movement profile, issues can happen because of misalignment, unbalanced loads, pole avoidances, loose tie-bar force, or long stroke activity.

Side-load applications don’t permit the cylinder pole to work in line during the expand withdrawal movement of the cylinder. This can bring about extreme seal disappointment, bushing wear, or annoying of the cylinder bar. In instances of disastrous disappointment, twisting of the cylinder pole or complete breakage of the bar can happen.

During establishment, practice care to appropriately adjust the heap to be moved with the cylinder’s middle line. The right arrangement of the cylinder bar with its mating machine part ought to likewise take a look at in both stretched out and withdrawn positions to guarantee legitimate activity. The ill-advised arrangement will bring about inordinate bar organ and additionally cylinder bore wear, which abbreviates cylinder life. Note that a cylinder might have a side burden – even though the pole was in-line when the cylinder was first introduced – because of wear of turn pins or mounting bolts working free during use.

A guideline is to choose a mounting strategy that ingests force on the cylinder’s centerline. On the off chance that the cylinder bar is stacked basically in pressure mode, a superior option is to choose a cap-end mounting style. Then again, on the off chance that the cylinder pole is stacked essentially in pressure, a head-end mounting is the favored best practice. Regardless, all cylinder mountings ought to be kept an eye on consistently.

Pole ‘run-out,’ or diversion, is an estimation of the bar’s dynamic movement as it goes this way and that on its stroke. One strategy for deciding on bar redirection is to mount a marker, run the cylinder full cycle and take pointer readings. How much bar redirection relies completely upon the cylinder’s arrangement. A few establishment choices are accessible to streamline cylinder execution. These incorporate diminishing pole bearing pressure by adding a stop tube, while one more choice comprises of utilizing a bar arrangement coupler to forestall bar redirection.

2 – Contaminants

Cylinders can be polluted inside from the air supply or remotely from the working climate. Kinds of pollution incorporate solids, water, and oil. To act as an illustration of the expected unfavorable impacts of tainting, solids, for example, particulates, pipe rust, and scale, and string sealant garbage can abridge seal life, plug holes, and harm surface completions.


Abrasive conditions can unleash ruin with pneumatic cylinder frameworks. When any sort of particulate enters a nose seal, it can implant itself in seals and orientation, transforming them into virtual sandpaper. However, the potential harm coming about because of solids tainting can be fundamentally diminished by watching out for producers’ port attachments and setting up until the framework is fitted with funneling. A subsequent choice is to completely clean funneling before interfacing it to cylinder ports to eliminate chips, burrs, and flotsam and jetsam left over from stringing and erupting tasks.

At the point when cylinders capability in threatening working conditions where unnecessary intensity, synthetics, paint, or weld splatter are available, safeguards can be introduced to forestall cylinder pole and bar seal harm. Extra establishment choices incorporate utilizing a metallic wiper to eliminate bigger particulates from the pole or adding a bar boot to guarantee further insurance. Further developing air filtration is one more choice to improve cylinder execution.


Water fume is available in completely packed air applications, where it gathers inside parts to hinder opening move through, weaken pre-oil, defile airline ointments, harm barrel or bar finish, and freeze in chilly climates. Establishment choices to lessen the injurious impacts of water fume incorporate utilizing impeccable practiced steel bars and clasp or utilizing unique coatings or epoxy paints.


One more sort of pneumatic cylinder foreign substance comprises of oils coming about because of air blower grease vestige or manufactured oils that are normally contrary with air-line parts. Such oils can cause seal expansion and hole stop. Once more, plant engineers have the choice of choosing seals that are viable with oils utilized in the application to diminish the harmful impacts of such impurities emphatically.

3 – Insufficient grease

Horrendous disappointment can likewise happen when cylinder seals have inadequate grease. High or quick cycle rates can produce unreasonable shock loads toward the finish of a stroke when the cylinder stirs things up around the town cap, or seals can just dry up from an absence of oil. The heat created by the framework could think twice about temperature limits. Anything that the justification for cylinder glitch, steps can be taken to expect and forestall disappointment.

Expected answers for oil-related issues incorporate choosing a ‘non-lube’ cylinder, adding a lubricator to the air-prep framework, or coordinating an infusion lube framework.


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