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ISO Cylinders

ISO standard Cylinders, also known as international standard hydraulic cylinders, are widely used components in industrial machinery. These cylinders play a crucial role in various applications, such as manufacturing and automation, by facilitating linear motion. They adhere to internationally recognised specifications, ensuring compatibility and reliability across diverse systems. ISO Cylinders come in various sizes and configurations, offering versatile solutions for motion control needs in industrial settings. Various types of air cylinders conform to the ISO standard such as: Tie Rod Cylinders, Short-stroke Cylinders, Mini Cylinders, & many more, all available today.

Key Features

Key features and benefits of ISO Cylinders.
1

Key Features

ISO standards ensure a high level of interchangeability and compatibility among different pneumatic components. This means that Emerson's ISO standard pneumatic cylinders are designed to work seamlessly with other ISO-compliant components from various manufacturers. This interchangeability simplifies maintenance, repair, and replacement processes.
2

Key Features

Adherence to international standards facilitates global standardisation in the design and specification of pneumatic cylinders. Companies operating in various regions can benefit from using standardised components, streamlining their supply chains and reducing the complexity of sourcing and inventory management.
3

Key Features

ISO standards are developed with a focus on ensuring the performance, reliability, and safety of products. Emerson's pneumatic cylinders designed according to ISO standards are likely to meet specific performance criteria, ensuring consistent and reliable operation. This can lead to improved efficiency in pneumatic systems, reduced maintenance requirements, and enhanced overall system performance.

ISO 15524

The Emerson ISO 15524 Standard defines a robust range of metric pneumatic short-stroke cylinders designed for consistent performance and integration across global industrial systems. Built to comply with international specifications, these ISO-standard cylinders provide a universal mounting footprint and compatibility, making them an ideal choice for OEMs and end-users alike.

Each cylinder in this range is single-rod and compact in design, engineered for precision linear motion in applications where space constraints and stroke limitations exist. They are particularly well-suited for high-cycle operations that demand accurate movement, repeatability, and durability under varying loads and pressures.

With a focus on efficiency, performance, and standardization, ISO 15524 pneumatic cylinders support quick installation, easy interchangeability, and seamless integration into existing setups.

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ISO 15552

Emerson ISO 15552 Standard Pneumatic Cylinders are engineered to meet the globally recognised ISO 15552 standard, which outlines key dimensional and performance requirements for pneumatic cylinders. This ensures compatibility across a wide range of systems and manufacturers, making them a reliable and futureproof solution for automation, process control, and industrial motion applications.

These cylinders are available in both single-rod and double-rod configurations, offering flexibility for different motion requirements. Thanks to the ISO 15552 specification, mounting dimensions and accessories remain uniform regardless of brand, which makes replacement, upgrading, and integration seamless. Whether you're installing in packaging, food and beverage, automotive, or general manufacturing environments, Emerson’s ISO cylinders deliver smooth, efficient, and consistent performance.

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ISO 21287

Emerson ISO 21287 Standard Pneumatic Cylinders are compact, high-performance actuators built in accordance with the ISO 21287 specification. This international standard defines the essential dimensional requirements for single rod compact cylinders, enabling straightforward integration and replacement across different systems and manufacturers.

These cylinders are ideal for installations where space is limited, but high performance is still required. Available in bore sizes from 20 mm to 100 mm, Emerson’s ISO 21287 cylinders offer excellent flexibility for a variety of industrial environments, including packaging, materials handling, automation, and OEM machinery.

Built to handle a maximum working pressure of 1,000 kPa (10 bar), these cylinders deliver consistent and dependable operation in demanding conditions. Their compact design does not compromise strength or reliability, making them a go-to choice for engineers seeking space-saving solutions without sacrificing performance.

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ISO 6431

Emerson ISO 6431 Pneumatic Cylinders are built to meet the rigorous specifications defined by the ISO 6431 standard, which provides a comprehensive framework for the metric series of mounting and dimensional guidelines. This includes everything from bore sizes and stroke lengths to mounting styles and piston rod dimensions—ensuring full interchangeability with other ISO-compliant cylinders across a wide range of pneumatic systems.

Designed to operate at a maximum working pressure of 1,000 kPa (10 bar), these cylinders are ideal for medium- to heavy-duty industrial applications where consistency, reliability, and ease of integration are essential. ISO 6431 cylinders from Emerson provide seamless compatibility and are widely adopted in sectors such as automotive manufacturing, packaging, machine tooling, and material handling.

By adhering to this globally recognised standard, Emerson ensures that their ISO 6431 cylinders deliver not just robust performance, but also standardised installation, allowing for effortless replacement and upgrades with minimal downtime.

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ISO 6432

Emerson ISO 6432 Pneumatic Cylinders conform to the requirements of ISO 6432:2015, an internationally recognised standard that specifies the mounting dimensions for metric round body cylinders. This standard plays a critical role in ensuring interchangeability, enabling quick and easy integration into a wide variety of pneumatic systems without the need for custom fittings or adaptors.

Designed for a maximum working pressure of 1,000 kPa (10 bar), these stainless steel-bodied cylinders are widely used in compact automation, light-duty industrial applications, and OEM machinery. They are particularly well-suited to applications that demand space efficiency, reliability, and fast response times, while maintaining full compliance with ISO standards.

Available in bore sizes typically ranging from 8 mm to 25 mm, Emerson’s ISO 6432 cylinders offer high-quality performance in a slim, lightweight package—ideal for use in tight spaces or mobile equipment.

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Cylinder Standards

ISO Standard Cylinder Type Body Style Typical Bore Range Max Pressure Application Type Key Features
ISO 6432 Miniature Round Cylinder Round stainless/aluminium 8 mm – 25 mm 10 bar Light-duty, compact automation Compact size, round body, ideal for tight spaces and OEM machinery
ISO 21287 Compact Cylinder Short-body profile 20 mm – 100 mm 10 bar Medium-duty, space-saving applications Short overall length, compact design, single-rod configuration
ISO 6431 Standard Profile Cylinder Tie rod or profile barrel 32 mm – 320 mm 10 bar General industrial use Interchangeable mounting, robust for medium to heavy-duty applications
ISO 15552 Standard Profile Cylinder Profile barrel (updated ISO 6431) 32 mm – 320 mm 10 bar Industrial automation & machinery Backward compatible with ISO 6431, wide mounting options, enhanced tolerances

FAQs

An ISO standard pneumatic cylinder is a type of actuator that complies with specific international standards (e.g., ISO 15552, ISO 6432) to ensure uniformity in mounting dimensions, bore sizes, and stroke lengths for easy interchangeability across manufacturers.

The most widely used standards include:

  • ISO 15552 – Profile cylinders with tie rods

  • ISO 6431 – Predecessor to ISO 15552

  • ISO 21287 – Compact cylinders

  • ISO 6432 – Round body miniature cylinders

ISO compliance ensures that pneumatic cylinders from different manufacturers can be interchanged without modifying the system layout. This simplifies maintenance, upgrades, and sourcing replacement parts.

ISO pneumatic cylinders are used in automation, packaging, food processing, automotive manufacturing, pharmaceuticals, and general machinery where reliability and consistency are crucial.

Most ISO cylinders are designed to operate up to 1,000 kPa (10 bar), suitable for a wide range of industrial pneumatic applications.

ISO 15552 replaced ISO 6431 and includes updated mounting dimensions and tolerances. It’s backward-compatible in most cases but offers a more modern, refined design standard.

No, ISO 21287 defines compact cylinders with shorter lengths, whereas ISO 15552 applies to standard profile cylinders. While they share similar bore sizes, their overall dimensions and mounting styles differ.
ISO 6432 cylinders are round body, miniature cylinders and are best suited for light-duty tasks due to their smaller bore sizes and compact design. They’re not ideal for heavy-load applications.
ISO cylinders are commonly constructed from aluminium, stainless steel, or a combination, with options like anodised bodies and corrosion-resistant piston rods depending on the environment.
Thanks to standardised dimensions, ISO cylinders support a wide range of mounting styles, including front/rear flange, foot mount, trunnion, clevis, and pivot mounts, depending on the standard.
Yes, that’s one of the main benefits. If your current setup uses ISO dimensions, you can swap out your cylinder with another ISO-compliant model without changing the mounting or setup.
Bore sizes vary by standard:ISO 6432: Typically 8–25 mmISO 21287: 20–100 mmISO 15552 / ISO 6431: 32–320 mm This range allows for flexibility across different force and space requirements.
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Pneumatic ISO Standard Cylinders