Overview
SIST ISO 3320:2014 specifies a standardized metric series of cylinder bore diameters and piston rod diameters for hydraulic and pneumatic cylinders used in fluid power systems. The standard also defines the corresponding area ratios for each size combination in these systems. By establishing preferred dimensions and ratios, SIST ISO 3320:2014 supports consistency and interchangeability in the design and manufacturing of fluid power components.
This standard is applicable only to the dimensional aspects of products manufactured according to the defined series; it does not address performance or functional requirements.
Key Topics
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Cylinder Bore Diameters
Establishes a series of preferred bore diameters, measured in millimetres, for hydraulic and pneumatic cylinders. The dimensions follow metric increments to enable uniformity across manufacturers.
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Piston Rod Diameters
Specifies corresponding piston rod diameters for each cylinder bore, also in metric sizes, facilitating standard assembly and replacement practices.
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Area Ratios
Defines standard ratios between the effective areas of cylinder cap and rod ends for each bore and rod size combination. This promotes predictability in cylinder force calculations and system design.
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Identification and Marking
Provides standardized ways for manufacturers to identify and refer to compliant products in documentation, catalogues, and sales materials.
Applications
SIST ISO 3320:2014 is widely adopted in the fluid power industry, supporting:
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Hydraulic Cylinders
Used in industrial machinery, construction equipment, mobile hydraulics, and manufacturing automation where consistent sizing is required for compatibility and maintenance.
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Pneumatic Cylinders
Applied in automation systems, packaging machinery, and anywhere pneumatic actuators are specified.
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Engineering and Design
Facilitates component selection, CAD modeling, and system integration by providing a common reference for bore and rod dimensions.
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Manufacturing and Procurement
Simplifies global sourcing and production processes by ensuring dimensional interchangeability between products from different suppliers.
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Maintenance and Service
Streamlines repairs and component replacement due to standardized sizing, reducing downtime and inventory complexity.
Related Standards
When implementing or referencing SIST ISO 3320:2014, consider these closely related standards:
- ISO 3: Preferred numbers - Defines series of preferred numbers that underpin the dimensional increments in ISO 3320.
- ISO 5598: Fluid power systems and components - Vocabulary - Offers essential definitions for terms used throughout fluid power standards.
- ISO 6099: Fluid power systems and components - Cylinders - Identification code for mounting dimensions and mounting types.
Compliance with these standards helps achieve greater interoperability and clarity in the design, manufacturing, and specification of fluid power cylinders.
By applying SIST ISO 3320:2014, organizations enhance consistency, interchangeability, and efficiency in fluid power component specification and ensure alignment with international best practices for hydraulic and pneumatic systems.
