Pneumatic cylinders with piston rod

Pneumatic cylinders with piston rod

Pneumatic cylinders are the most widely used linear actuators in industrial automation, found in everything from automotive welding fixtures to food packaging lines. Engineers choose them for their straightforward force output, fast cycle times, and low maintenance requirements. Festo's cylinder range covers standard ISO sizes through to compact, guided, and rodless designs for demanding applications.

Pneumatic cylinders with piston rod

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Double-acting, compact, guided, rodless, and rotary types

This category covers the full range of Festo pneumatic cylinders for industrial automation. The most common type is the double-acting cylinder (Festo DSBC series, ISO 15552), where compressed air drives both extension and retraction — the standard choice for most machine-building applications. Compact cylinders (Festo ADVU/AEVC, ISO 21287) suit space-constrained installations such as clamping and pressing. Guided cylinders (Festo DFM/DFSP) integrate linear guides directly into the unit, handling side loads and preventing rod rotation in pick-and-place and precision positioning tasks. Rodless cylinders (Festo DGC series) carry the load on an external carriage, making them practical for long strokes where a conventional rod would create an unacceptable footprint. Semi-rotary actuators (Festo DSM/DRVS) convert air pressure into rotary motion for indexing and clamping. Single-acting cylinders use a spring return and are selected where fail-safe retraction is required on air loss.

Key technical selection criteria

  • Bore diameter: Determines output force at a given supply pressure. ISO standard sizes from 12 mm to 320 mm.
  • Stroke length: Defines travel range; long strokes on small-bore rods require buckling checks.
  • Operating pressure: Typically 4–8 bar working pressure; confirm minimum actuation pressure for light-load applications.
  • Mounting style: Foot, flange, trunnion, clevis, or pivot — match to load direction and any angular movement.
  • Cushioning: Adjustable cushioning for high-speed or heavy loads; self-adjusting (Festo PneumoSpring) for variable load conditions.
  • Seal material: NBR for standard use; FKM/Viton for oils and chemicals; EPDM for steam; PTFE for low-friction or clean-room.
  • IP rating and rod material: IP65/IP67 with stainless steel rod for washdown, food, or outdoor environments.
  • Position sensing: Magnetic piston with T-slot reed, Hall-effect, or GMR sensors for end-of-stroke detection; analog sensors for continuous feedback.
TypeTypical Festo SeriesBest For
Double-acting (ISO 15552)DSBCGeneral machine building, long strokes
Compact (ISO 21287)ADVU, AEVCClamping, pressing, tight spaces
Guided cylinderDFM, DFSPSide loads, pick-and-place, no rod rotation
RodlessDGCLong-stroke linear transport, space saving
Semi-rotaryDSM, DRVSIndexing, turning, clamping fixtures
Single-actingDSNU-S, ESNUFail-safe retraction, simple push applications

How do I select the correct bore size for my application?

Calculate required force from bore and supply pressure (F = π/4 × D² × P), then apply a 10–15% derating for friction. Festo's Positioning Drives software automates this calculation.

When should I use a guided cylinder instead of a standard cylinder?

Use a guided cylinder like the Festo DFM when the load applies side forces to the rod or when rod rotation must be prevented — standard cylinders are not designed to handle lateral loads.

Are Festo DSBC cylinders interchangeable with other ISO 15552 cylinders?

Yes. ISO 15552 defines mounting and port dimensions, so Festo DSBC cylinders are dimensionally interchangeable with ISO 15552-compliant cylinders from other manufacturers.

What specification do I need for a cylinder used in a washdown or food processing environment?

Specify IP65 or IP67 protection, stainless steel piston rod, EPDM or FKM seals, and a corrosion-resistant barrel — Festo offers dedicated stainless and hygienic design variants for these environments.