Overview
ISO 16656:2016 specifies mounting dimensions for single-rod, short-stroke hydraulic cylinders with bores from 32 mm to 100 mm for use at 10 MPa (100 bar). The standard defines dimensional guidelines required for interchangeability of commonly used short-stroke cylinders, with or without magnetic functions. It is intended to provide consistent mounting interfaces while allowing manufacturers design flexibility.
Key Topics
- Scope and purpose: Establishes mounting dimensions to ensure interchangeability and compact mounting of cylinders used in hydraulic fluid power systems.
- Bore sizes covered: 32, 40, 50, 63, 80, 100 mm (in accordance with ISO 3320).
- Pressure rating: Intended for cylinders rated at 10 MPa (100 bar).
- Nominal strokes: Selections in accordance with ISO 4393; typical nominal strokes listed include: 5, 10, 16, 20, 25, 32, 40, 50 mm.
- Piston rod characteristics: Covers piston rods with shouldered male thread ends and female thread ends; figures illustrate male and female threaded rod options.
- Mounting types and dimensions: Includes through-bolt body mounting (MB1) details, associated figures (Figures 1 and 2) and dimension tables (Table 2). Pilot extensions are optional; when used, dimensions B and VD apply.
- Identification: Provides a recommended identification statement for catalogues and test reports when complying with the standard.
Practical notes: The standard references related ISO documents (e.g., ISO 3320, ISO 4393, ISO 4395, ISO 6099) for bore series, stroke series, rod end types, and identification coding.
Applications
ISO 16656:2016 is applicable where consistent, interchangeable mounting is required for compact hydraulic cylinder installations. Typical benefits and applications include:
- Faster equipment integration by using standardized mounting interfaces.
- Simplified spare-parts management and replacement of cylinders across machines.
- Space‑efficient machine design where short-stroke cylinders are preferred.
- Use in hydraulic systems requiring up to 10 MPa (100 bar) working pressure.
Common application areas: industrial automation, press and clamp devices, material handling equipment, and machines where short, repeatable linear motion is required.
Related Standards
ISO 16656 cross-references and aligns with several ISO standards that govern components and dimensions in hydraulic systems:
- ISO 3320 - cylinder bores and piston rod diameters (metric series)
- ISO 4393 - cylinder nominal strokes
- ISO 4395 - piston rod end types and dimensions
- ISO 6099 - identification code for mounting dimensions and types
- ISO 1179-1 / ISO 6149-1 - port and stud end connections referenced for ports in Table 2
Compliance with ISO 16656:2016 helps manufacturers and system designers achieve mechanical interchangeability and maintain compatibility with established hydraulic component series. For catalogs and technical literature, use the identification statement provided in the standard to indicate compliance.