ISO 13726:2026

International
Standard
ISO 13726
Third edition
Hydraulic fluid power — Single
2026-03
rod cylinders, 16 MPa (160 bar)
compact series with bores from
250 mm to 500 mm — Accessory
mounting dimensions
Transmissions hydrauliques — Vérins à simple tige, série
compacte 16 MPa (160 bar) d'alésages 250 mm à 500 mm —
Dimensions d'interchangeabilité des accessoires
Reference number
© ISO 2026
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Accessory mounting dimensions . 1
5 Requirements for cross-sections . 2
6 Application instructions . 2
6.1 General requirement .2
6.2 Installation .2
6.3 Lubrication .2
7 Designation . 2
8 Identification statement (reference to this document) . 2
Bibliography . 8

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 3,
Cylinders.
This third edition cancels and replaces the second edition (ISO 13726:2008), which has been technically
revised.
The main changes are as follows:
— Accessory with code of AA4-R has been added in the Scope;
— List of standards has been updated in Clause 2;
— 4.2 has been replaced by a Note;
— Clause 5 has been updated to delete the requirement on yield strength of the material;
— A new Subclause 6.1 has been added;
— Designation format in Clause 7 have been changed to align with ISO 8132 and ISO 8133;
— Figure 1 to Figure 4 have been modified;
— Dimension NT has been added in Table 1 and Table 2;
— Dimension CV has been changed to a reference dimension in Table 1 and Table 2;
— Unit of the nominal force has been changed to kN in Table 1 to Table 5;
— Figure 6 have been added for accessory type AA4-R.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
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 device converts hydraulic power into linear
mechanical force and motion. It consists of a movable element, i.e. a pis
...