Overview
ISO 6022:2006 - Hydraulic fluid power - Mounting dimensions for single rod cylinders, 25 MPa (250 bar) series specifies standardized mounting dimensions to ensure interchangeability of single‑rod hydraulic cylinders rated for 25 MPa (250 bar) service. The standard provides dimensional guidance (figures and tables) for heads, caps, rod ends, trunnions, ports and flanges, together with stroke‑dependent tolerances and identification guidance. ISO 6022:2006 replaces earlier editions and allows manufacturers flexibility while establishing a common mounting basis for design and procurement.
Key topics and technical requirements
- Scope and intent: Defines mounting dimensions required for interchangeability of single‑rod cylinders for use at 25 MPa (250 bar).
- Bore sizes covered: 50, 63, 80, 100, 125, 140, 160, 180, 200, 250, 320 mm (aligned with ISO 3320).
- Mounting types (coded per ISO 6099):
- MF3 - Head, circular flange
- MF4 - Cap, circular flange
- MP3 - Cap, fixed plain eye
- MP4 - Cap, detachable plain eye
- MP5 - Cap, fixed eye with spherical bearing
- MP6 - Cap, detachable eye with spherical bearing
- MT4 - Intermediate fixed or movable trunnion (male)
- Piston rod characteristics: Includes shouldered male thread rod ends; compatibility with ISO 4395 rod end types and ISO 8132 accessory mounting dimensions.
- Ports and flanges: Specifies port/flange sizes and references ISO 1179‑1, ISO 6149‑1, ISO 6162‑1/2 and ISO 6164. Includes a caution about pressure intensification in the rod cavity and guidance to select higher‑pressure flange series when required.
- Tolerances and stroke: Stroke‑dependent tolerances for key mounting dimensions (see Tables 6 and 7). Piston stroke tolerances are listed and must not be added to mounting tolerance values.
- Identification statement: Provides the recommended declaration for catalogs and test reports when complying with ISO 6022:2006.
Applications and who uses this standard
- Hydraulic cylinder manufacturers - to design 25 MPa single‑rod cylinders that are interchangeable with industry components.
- Machine builders and OEMs - to specify compatible cylinders for mobile equipment, industrial presses, injection moulders and other high‑pressure hydraulic systems.
- Purchasing and maintenance teams - to verify replacement cylinder dimensions, ensure correct mounting type, and select appropriate ports/flanges.
- Design engineers - to coordinate mounting interfaces, rod threads and tolerance stacks when integrating cylinders into systems.
Related standards
Keywords: ISO 6022:2006, hydraulic cylinders, mounting dimensions, 25 MPa, 250 bar, single rod cylinders, interchangeability, bore sizes, mounting types, piston rod threads, ports and flanges, tolerances.
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