What is ISO 6431:
The International Standards Organization (ISO) establishes a metric series of
mounting dimensions (basic dimensions, nominal stroke and tolerances, bore sizes,
mounting styles, piston rod characteristics) required for interchangeability of common
used pneumatic cylinders for a maximum working pressure of 1,000 kPa (10 bar, 150
psi). Applies to pneumatic cylinders with detachable mountings.
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What is ISO 15552 (ISO 6431 VDMA 24562):
Basically, the VDMA specification establishes a standard for the dimensions of the
basic cylinder body without the mounting attachments. ISO combines the ISO 6431 &
VDMA 24562 and rolled them into the ISO 15552 standard.
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Why use an ISO cylinder:
Using cylinders that conform to an ISO standard insures that you will be able to
replace the actuator for many years. Festo has been a leader in this area for over
thirty years and has devoted R&D to keeping their designs modern. This means that
you can get “State of the Art” designs for your new applications and still be able to
replace the old cylinders on your existing machines. We also have other equipment
that conforms to ISO standards.