ISO 16656:2016

Hydraulic fluid power - Single rod, short-stroke cylinders with bores from 32 mm to 100 mm for use at 10 MPa (100 bar) - Mounting dimensions

ISO 16656:2016 establishes mounting dimensions for single rod short-stroke cylinders with bores from 32 mm to 100 mm for use at 10 MPa (100 bar) with or without magnetic functions, as required for interchangeability of these commonly used hydraulic cylinders.

Transmissions hydrauliques — Vérins course courte à simple tige, d'alésages 32 mm à 100 mm, pour utilisation à 10 MPa (100 bar) — Dimensions d'interchangeabilité

Fluidna tehnika - Hidravlika - Kratkohodni valji z enostransko batnico s premeri 32 mm do 100 mm in za 10 MPa (100 bar) - Vgradne mere

General Information

• Status: Published
• Publication Date: 17-Jul-2016
• ICS: 23.100.20 - Cylinders
• Technical Committee: ISO/TC 131/SC 3 - Cylinders
• Drafting Committee: ISO/TC 131/SC 3/WG 1 - Hydraulic cylinder mounting dimensions
• Current Stage: 9093 - International Standard confirmed
• Start Date: 05-Nov-2021
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 16656:2021 - Hydraulic fluid power -- Single rod, short-stroke cylinders with bores from 32 mm to 100 mm for use at 10 MPa (100 bar) -- Mounting dimensions

Relations

• Revises: ISO 16656:2004 - Hydraulic fluid power - Single rod, short-stroke cylinders with bores from 32 mm to 100 mm for use at 10 MPa (100 bar) - Mounting dimensions
• Effective Date: 12-Feb-2014

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.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2021
Nadomešča:
SIST ISO 16656:2005
Fluidna tehnika - Hidravlika - Kratkohodni valji z enostransko batnico s premeri 32
mm do 100 mm in za 10 MPa (100 bar) - Vgradne mere
Hydraulic fluid power -- Single rod, short-stroke cylinders with bores from 32 mm to 100
mm for use at 10 MPa (100 bar) -- Mounting dimensions
Transmissions hydrauliques -- Vérins course courte à simple tige, d'alésages 32 mm à
100 mm, pour utilisation à 10 MPa (100 bar) -- Dimensions d'interchangeabilité
Ta slovenski standard je istoveten z: ISO 16656:2016
ICS:
23.100.20 Hidravlični valji Cylinders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 16656
Second edition
2016-08-01
Hydraulic fluid power — Single rod,
short-stroke cylinders with bores
from 32 mm to 100 mm for use
at 10 MPa (100 bar) — Mounting
dimensions
Transmissions hydrauliques — Vérins course courte à simple tige,
d’alésages 32 mm à 100 mm, pour utilisation à 10 MPa (100 bar) —
Dimensions d’interchangeabilité
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Bore sizes . 2
5 Nominal strokes . 2
6 Piston rod characteristics . 2
7 Dimensions . 2
8 Identification statement (reference to this International Standard) . 5
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 131, Fluid power systems, Subcommittee SC 3,
Cylinders.
This second editi
...

INTERNATIONAL ISO
STANDARD 16656
Second edition
2016-08-01
Hydraulic fluid power — Single rod,
short-stroke cylinders with bores
from 32 mm to 100 mm for use
at 10 MPa (100 bar) — Mounting
dimensions
Transmissions hydrauliques — Vérins course courte à simple tige,
d’alésages 32 mm à 100 mm, pour utilisation à 10 MPa (100 bar) —
Dimensions d’interchangeabilité
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Bore sizes . 2
5 Nominal strokes . 2
6 Piston rod characteristics . 2
7 Dimensions . 2
8 Identification statement (reference to this International Standard) . 5
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 131, Fluid power systems, Subcommittee SC 3,
Cylinders.
This second edition cancels and replaces the first edition (ISO 16656:2004), of which it constitutes a
minor revision.
iv © ISO 2016 – All rights reserved

Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure
within an enclosed circuit.
One component of such systems is the fluid power cylinder. This is a device that converts power int
...