Glossary Updates12 new terms added to the glossaries · October 2, 2026, 22:44 CEST
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Glossary · Pneumatics and hydraulics

Pneumatic cylinder

Also known as: Air cylinder, Pneumatic actuator

German: Pneumatikzylinder

In pneumatics, a pneumatic cylinder is a linear actuator in which compressed air acts on a piston to produce linear force and motion. ISO 15552 standardizes mounting dimensions of a common cylinder type with detachable mountings.

  • Fluid power

In one sentence

A pneumatic cylinder is a linear actuator driven by compressed air acting on a piston; ISO 15552 standardizes common mounting dimensions.

Example

A sorting station uses ISO 15552 pneumatic cylinders with magnetic pistons and position sensors to push parts off the conveyor.

How it applies

  • Engineering: Cylinders are sized by force (pressure times area, with a safety margin), stroke, speed and mounting. Standardized dimensions make cylinders from different manufacturers interchangeable mechanically.
  • Commissioning: Speed, cushioning and sensor positions are adjusted with the real load.
  • Operation: Because air is compressible, pneumatic cylinders are not stiff; positions between end stops need special solutions such as Servo pneumatics or clamping units.
  • Documentation: Describe crushing and impact hazards at the cylinder's travel range and behavior on loss or return of air. Include venting before maintenance: residual air can move the cylinder when fittings are loosened.

Pneumatic vs. electric cylinder

An electric cylinder uses a motor and a screw; it positions freely and precisely. A pneumatic cylinder is simple and robust, usually moving between end positions.

By knowledge.aitechdoc.world · Published September 26, 2026 · Last reviewed

Source: ISO 15552:2018, Pneumatic fluid power — Cylinders with detachable mountings, 1 000 kPa (10 bar) series, bores from 32 mm to 320 mm — Basic, mounting and accessories dimensions

Definitions follow the cited standards and specifications. Where a source is a copyrighted publication, such as an ISO, IEC or EN standard, the definition is a close paraphrase, not a verbatim quotation, so as not to infringe copyright. We recommend reading the original publication. The sections “How it applies” are editorial commentary by AI TechDoc Knowledge and are not part of any standard.

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