Hydraulic fluid power -- Cylinders -- Piston seal housings incorporating bearing rings -- Dimensions and tolerances

Establishes the dimensions and associated tolerances for a series of housings for piston seals. Specifies the dimensions for a range of seal housings of 25 to 500 mm. It applies to piston-heads that may either be assembled from a number of components or made in one piece. A figure shows an example of housing.

Transmissions hydrauliques -- Vérins -- Logements de joints d'étanchéité à bagues de guidage pour pistons -- Dimensions et tolérances

Hidravlika - Valji - Ohišja batnih tesnil z ležajnimi obroči - Mere in tolerance

General Information

Status
Published
Publication Date
31-Oct-1995
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Nov-1995
Due Date
01-Nov-1995
Completion Date
01-Nov-1995

Overview

SIST ISO 6547:1995 is an international standard published by the International Organization for Standardization (ISO) that specifies dimensions and tolerances for piston seal housings incorporating bearing rings used in hydraulic fluid power cylinders. It defines precise dimensional guidelines for seal housings ranging from 25 to 500 mm nominal bore diameters. This standard applies to piston heads which can be either assembled from multiple components or manufactured as a single piece.

The standard aims to standardize the physical characteristics of piston seal housings to ensure compatibility, reliability, and performance in hydraulic systems. It does not cover seal design itself but focuses on housing geometry that supports seals and bearing rings, facilitating proper sealing and durable operation under pressure.

Key Topics

  • Scope and Range: Specifies dimensions and tolerances for piston seal housings with bearing rings, covering cylinders with bore sizes from 25 mm up to 500 mm.

  • Dimensional Parameters:

    • Outside diameter (D)
    • Inside diameter (d1, d2)
    • Radial width (s)
    • Axial lengths (L1 - seal groove length, L2 - bearing ring length, L3 - overall axial length)
    • Lead-in chamfer size and angle (between 20° and 30°)
    • Radius and chamfer details to avoid sharp edges and support seal extrusion resistance
  • Design Considerations:

    • Removes sharp edges and burrs to prevent seal damage
    • Lead-in chamfer on the piston or housing assists with seal fitting
    • Housing profile commonly of a “T” shape for designs incorporating bearing rings
  • Surface Finish: While specific requirements are application-dependent, the surface in contact with seals should be sufficiently smooth and agreed upon between manufacturer and user.

  • Application Scope: Applies equally to pistons constructed from multiple parts or machined as a single piece.

  • Reference to Related Standards: ISO 3320 (cylinder bore and piston rod diameters), ISO 5597 (seal housing dimensions), and ISO 5598 (fluid power systems glossary).

Applications

ISO 6547 is essential for designers, manufacturers, and engineers involved in the production and maintenance of hydraulic cylinders used in fluid power systems. Its practical applications include:

  • Seal Housing Manufacturing: Assists manufacturers in producing piston seal housings with consistent dimensions that ensure adequate fit and function with seals and bearing rings.

  • Hydraulic Cylinder Design: Provides designers with standard housing dimensions, saving redesign efforts and improving interchangeability of components.

  • Quality Assurance: Enables quality control teams to verify housing dimensions against internationally accepted tolerances to uphold system reliability.

  • Maintenance and Repair: Facilitates sourcing of replacement parts and seal housings by providing exact dimension standards ensuring compatibility with existing cylinders.

  • Industrial Sectors: Applies broadly in industries reliant on hydraulic systems such as mobile machinery, manufacturing equipment, aerospace, and automotive sectors.

Related Standards

To fully leverage ISO 6547 in hydraulic cylinder design and manufacturing, consider these associated ISO standards:

  • ISO 5597-1: Hydraulic fluid power - Cylinder rod and piston seals for reciprocating applications - Dimensions and tolerances of housings.

  • ISO 5598: Fluid power systems and components - Vocabulary providing terminology for fluid power technology.

  • ISO 3320: Fluid power cylinders - Cylinder bore and piston rod diameters - Metric series, for standard bore sizes.

  • ISO 286: System for Limits and Fits - Defines general tolerances and fits applicable to mechanical engineering components.

  • ISO 468: Surface roughness parameters and guidelines for specifying surface finish.


By complying with SIST ISO 6547:1995, manufacturers and engineers ensure compatible piston seal housing dimensions that aid in extending hydraulic cylinder lifespan, reduce leakage risk, and improve overall hydraulic system performance. This standard is integral to achieving uniformity and quality across fluid power systems worldwide.

Standard

ISO 6547:1981 - Hydraulic fluid power -- Cylinders -- Piston seal housings incorporating bearing rings -- Dimensions and tolerances

English language
3 pages
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Standard

ISO 6547:1981 - Transmissions hydrauliques -- Vérins -- Logements de joints d'étanchéité a bagues de guidage pour pistons -- Dimensions et tolérances

French language
3 pages
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Standard

ISO 6547:1981 - Transmissions hydrauliques -- Vérins -- Logements de joints d'étanchéité a bagues de guidage pour pistons -- Dimensions et tolérances

French language
3 pages
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Frequently Asked Questions

SIST ISO 6547:1995 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Hydraulic fluid power -- Cylinders -- Piston seal housings incorporating bearing rings -- Dimensions and tolerances". This standard covers: Establishes the dimensions and associated tolerances for a series of housings for piston seals. Specifies the dimensions for a range of seal housings of 25 to 500 mm. It applies to piston-heads that may either be assembled from a number of components or made in one piece. A figure shows an example of housing.

Establishes the dimensions and associated tolerances for a series of housings for piston seals. Specifies the dimensions for a range of seal housings of 25 to 500 mm. It applies to piston-heads that may either be assembled from a number of components or made in one piece. A figure shows an example of housing.

SIST ISO 6547:1995 is classified under the following ICS (International Classification for Standards) categories: 23.100.20 - Cylinders. The ICS classification helps identify the subject area and facilitates finding related standards.

You can purchase SIST ISO 6547:1995 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-november-1995
+LGUDYOLND9DOML2KLãMDEDWQLKWHVQLO]OHåDMQLPLREURþL0HUHLQWROHUDQFH
Hydraulic fluid power -- Cylinders -- Piston seal housings incorporating bearing rings --
Dimensions and tolerances
Transmissions hydrauliques -- Vérins -- Logements de joints d'étanchéité à bagues de
guidage pour pistons -- Dimensions et tolérances
Ta slovenski standard je istoveten z: ISO 6547:1981
ICS:
23.100.20 +LGUDYOLþQLYDOML Cylinders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDlZATION~ME)I(LlYHAPO,4HAR OPrAHM3AUMR fl0 CTAHAAPTM3AlJ’Wl~ORGANlSATION INTERNATIONALE DE NORMALISATION
Hydraulic fluid power - Cylinders - Piston seal housings
incorporating bearing rings - Dimensions and tolerantes
Transmissions h ydrauliques - Wrins - Logements de joints d%tanch&t& 2 bagues de guidage pour pistons - Dimensions et
tokrances
First edition - 1981-08-15
UDC 621.226 : 62-762.6 Ref. No. ISO 65474981 (E)
hydraulic fluid power, hydraulic cylinders, pistons, Piston rings, housings, Seals (Stoppers), dimensions, dimensional
Descriptors : fluid power,
tolerantes.
Price based on 3 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bedies). The work of developing Inter-
national Standards is carried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 6547 was developed by Technical Committee ISO/TC 131,
Fluid power Systems and components, and was circulated to the member bodies in
February 1980.
lt has been approved by the member bodies of the following countries :
Australia Finland Norway
Austria France Poland
Belgium Germany, F. R. Romania
Hungary South Africa, Rep. of
Brazil
Canada India Spain
China ltaly Sweden
Japan
Czechoslovakia USA
Egypt, Arab Rep. of Netherlands USSR
The member body of the following country expressed disapproval of the docu ment on
technical grounds
United Kingdom
0 International Organization for Standardkation, 1981
Printed in Switzerland
INTERNATIONAL STANDARD 60 6547-1981 (E)
Hydraulic fluid power - Cylinders - Piston seal housings
incorporating bearing rings - Dimensions and tolerantes
0 Introduction ISO 439411, Fluid power Systems and components - Cylinder
barrels - Part 7 : Requirements for steel tubes with specially
In hydraulic fluid power Systems, power is transmitted and finished bores.
controlled through a liquid under pressure within an enclosed
circuit. Sealing devices are used to contain the pressurized fluid ISO 5597/ 1, Hydraulic fluid power - Cylinder rod and Piston
within components having elements with relative motion, for Seals for reciprocating applications - Dimensions and
example, a linear movement within hydraulic cylinders. These tolerantes of housings - Part 7 : Normal series.
sealing devices are used with both cylinder rod and Piston seal
I S 0 5598, Fluid po wer s ys tems and componen ts -
housings. Glossary. 1)
ISO 5597/1 provides details of seal housings of a purely
rectangular Profile. However, where it is the practice to employ 3 Definitions
a design of Piston-head seal that incorporates bearing rings, the
Profile of the housing is basically of “T” form. This For definitions of terms used, see ISO 5598.
International Standard specifically relates to such applications.
4 Symbols
1 Scope and field of application
Symbols used in this International Standard are as follows :
1.1 This International Standard establishes the dimensions
D=
outside diameter (bare diameter or rod seal groove diam-
and associated tolerantes for a series of housings for hydraulic
eter) of the seal housing
cylinder Piston Seals that incorporate bearing rings.
s = radial width of the seal housing
1.2 lt specifies the dimensions for a range of seal housings
for cylinders of 25 to 500 mm.
d, = inside
...


International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDlZATION~ME)I(LlYHAPO,4HAR OPrAHM3AUMR fl0 CTAHAAPTM3AlJ’Wl~ORGANlSATION INTERNATIONALE DE NORMALISATION
Hydraulic fluid power - Cylinders - Piston seal housings
incorporating bearing rings - Dimensions and tolerantes
Transmissions h ydrauliques - Wrins - Logements de joints d%tanch&t& 2 bagues de guidage pour pistons - Dimensions et
tokrances
First edition - 1981-08-15
UDC 621.226 : 62-762.6 Ref. No. ISO 65474981 (E)
hydraulic fluid power, hydraulic cylinders, pistons, Piston rings, housings, Seals (Stoppers), dimensions, dimensional
Descriptors : fluid power,
tolerantes.
Price based on 3 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bedies). The work of developing Inter-
national Standards is carried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 6547 was developed by Technical Committee ISO/TC 131,
Fluid power Systems and components, and was circulated to the member bodies in
February 1980.
lt has been approved by the member bodies of the following countries :
Australia Finland Norway
Austria France Poland
Belgium Germany, F. R. Romania
Hungary South Africa, Rep. of
Brazil
Canada India Spain
China ltaly Sweden
Japan
Czechoslovakia USA
Egypt, Arab Rep. of Netherlands USSR
The member body of the following country expressed disapproval of the docu ment on
technical grounds
United Kingdom
0 International Organization for Standardkation, 1981
Printed in Switzerland
INTERNATIONAL STANDARD 60 6547-1981 (E)
Hydraulic fluid power - Cylinders - Piston seal housings
incorporating bearing rings - Dimensions and tolerantes
0 Introduction ISO 439411, Fluid power Systems and components - Cylinder
barrels - Part 7 : Requirements for steel tubes with specially
In hydraulic fluid power Systems, power is transmitted and finished bores.
controlled through a liquid under pressure within an enclosed
circuit. Sealing devices are used to contain the pressurized fluid ISO 5597/ 1, Hydraulic fluid power - Cylinder rod and Piston
within components having elements with relative motion, for Seals for reciprocating applications - Dimensions and
example, a linear movement within hydraulic cylinders. These tolerantes of housings - Part 7 : Normal series.
sealing devices are used with both cylinder rod and Piston seal
I S 0 5598, Fluid po wer s ys tems and componen ts -
housings. Glossary. 1)
ISO 5597/1 provides details of seal housings of a purely
rectangular Profile. However, where it is the practice to employ 3 Definitions
a design of Piston-head seal that incorporates bearing rings, the
Profile of the housing is basically of “T” form. This For definitions of terms used, see ISO 5598.
International Standard specifically relates to such applications.
4 Symbols
1 Scope and field of application
Symbols used in this International Standard are as follows :
1.1 This International Standard establishes the dimensions
D=
outside diameter (bare diameter or rod seal groove diam-
and associated tolerantes for a series of housings for hydraulic
eter) of the seal housing
cylinder Piston Seals that incorporate bearing rings.
s = radial width of the seal housing
1.2 lt specifies the dimensions for a range of seal housings
for cylinders of 25 to 500 mm.
d, = inside diameter (rod diameter or Piston seal groove
diameter) of the seal housing
1.3 lt is not the intention of this International Standard to set
= axial length (Seal groove length) of the seal ring
forth details of seal design, since the manner of construction of Ll
Seals varies with each manufacturer. The design and material of
452 = axial length of the bearing ring
the seal and the incorporated bearing rings are determined by
conditions such as temperature and pressure.
L3 = Overall axial length of seal and bea
...


Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWlEIKJ’JYHAPO~HAR OPl-AHM3AL&lR fl0 CTAH~APTM3Al#4M.ORGANISATION INTERNATIONALE DE NORMALISATION
Transmissions hydrauliques - Vérins - Logements de
joints d’étanchéité à bagues de guidage pour pistons -
Dimensions et tolérances
Hydraulic fluid power - Cylinders - Piston seal housings incorporating bearing rings - Dimensions and tolerances
Premiere Édition - 198148-15
CDU 621.226 : 62-762.6
Réf. no : ISO 6547-1981 (FI
L
Descripteurs : transmission par fluide, transmission hydraulique, vérin hydraulique, piston, segment de piston, encastrement, joint d’étanchéité,
dimension, tolérance de dimension.
Prix basé sur 3 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 6547 a été élaborée par le comité technique ISO/TC 31,
Transmissions hydrauliques et pneumatiques, et a été soumise aux comités membres
en février 1980.
Les comités membres des pays suivants l’ont approuvée :
Afrique du Sud, Rép. d’ Égypte, Rép. arabe d’ Norvège
Allemagne, R. F.
Espagne Pays- Bas
Australie Finlande Pologne
Autriche France Roumanie
Belgique Hongrie Suède
Brésil Inde Tchécoslovaquie
Canada Italie URSS
Chine
Japon USA
Le comité membre du pays suivant l’a désapprouvée pour des raisons techniques :
Royaume-Uni
0 Organisation internationale de normalisation, 1981
Imprimé en Suisse
ISO 65474981 (F)
NORME INTERNATIONALE
:a
Transmissions hydrauliques - Vérins - Logements de
joints d’étanchéité à bagues de guidage pour pistons -
Dimensions et. tolérances
0 Introduction ISO 439411, Transmissions hydrauliques et pneumatiques -
Tubes pour vérins - Partie 7 : Caracteristiques des tubes en
Dans les systémes de transmissions hydrauliques, l’énergie est
acier à alésage de finition spéciale.
transmise et commandée par l’intermédiaire d’un fluide sous
pression circulant en circuit fermé. Les joints d’étanchéité
ISO 5597/1, Transmissions hydrauliques - Joints d’étanchéite
servent a maintenir le fluide sous pression dans les composants
pour tiges de piston et pistons de V&ins hydrauliques à
ayant des élements animés d’un mouvement relatif, par Dimensions et tolerances des logements - Partie I :
piston -
exemple, un mouvement lineaire dans les vérins hydrauliques. Skie normale.
Ces joints d’étanchéité sont utilisés dans des logements
aménagés sur la tige et le piston du vérin. I SO 5598, Transmissions hydrauliques et pneumatiques -
Vocabulaire. 1)
L’ISO 5597/1 fournit les détails des logements pour joints
d’étanchéité de section purement rectangulaire. Toutefois,
3 Définitions
lorsqu’il y a lieu d’utiliser un joint d’étanchéité comportant des
bagues de guidage, le logement est usine en forme de «T)). La
Pour la définition des termes utilisés, voir ISO 5598.
présente Norme internationale concerne spécifiquement de
telles applications.
4 Symboles littéraux
1 Objet et domaine d’application
Les symboles littéraux utilisés dans la présente Norme interna-
tionale sont les suivants :
1.1 La présente Norme internationale fixe les dimensions et
les tolérances correspondantes pour les pistons de vérins
diamétre extérieur du logement de joint (diamètre d’alé-
D=
hydrauliques comportant des bagues de guidage.
sage ou diamétre en fond de gorge pour joints de tige)
1.2 Elle spécifie les dimensions d’une série de logements
S = largeur radiale du logement de joint
pour vérins de 25 à 500 mm de diamétre.
= diamétre intérieur du logement de joint (diamètre de la
dl
tige ou diametre en fond de gorge pour joint de piston)
1.3 II n’est pas prévu dans cette Norme internationale de
préciser les details de construction des joints, car le mode de
= longueur axiale du logement de joint (longueur de la
construction varie avec chaque fabricant. La forme du joint et le 4
gorge pour joint)
matériau utilisé, ainsi que les paliers complémentaires sont
déterminés en fonction des conditions d’emploi, notamment
L* = longueur axiale du logement de la bague de guidage
pression et température.
La = longueur axiale totale du logement de joint et des bagues
1.4 Elle s’applique aux pistons formés d’un assemblage de
de guidage (a ti
...


Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWlEIKJ’JYHAPO~HAR OPl-AHM3AL&lR fl0 CTAH~APTM3Al#4M.ORGANISATION INTERNATIONALE DE NORMALISATION
Transmissions hydrauliques - Vérins - Logements de
joints d’étanchéité à bagues de guidage pour pistons -
Dimensions et tolérances
Hydraulic fluid power - Cylinders - Piston seal housings incorporating bearing rings - Dimensions and tolerances
Premiere Édition - 198148-15
CDU 621.226 : 62-762.6
Réf. no : ISO 6547-1981 (FI
L
Descripteurs : transmission par fluide, transmission hydraulique, vérin hydraulique, piston, segment de piston, encastrement, joint d’étanchéité,
dimension, tolérance de dimension.
Prix basé sur 3 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 6547 a été élaborée par le comité technique ISO/TC 31,
Transmissions hydrauliques et pneumatiques, et a été soumise aux comités membres
en février 1980.
Les comités membres des pays suivants l’ont approuvée :
Afrique du Sud, Rép. d’ Égypte, Rép. arabe d’ Norvège
Allemagne, R. F.
Espagne Pays- Bas
Australie Finlande Pologne
Autriche France Roumanie
Belgique Hongrie Suède
Brésil Inde Tchécoslovaquie
Canada Italie URSS
Chine
Japon USA
Le comité membre du pays suivant l’a désapprouvée pour des raisons techniques :
Royaume-Uni
0 Organisation internationale de normalisation, 1981
Imprimé en Suisse
ISO 65474981 (F)
NORME INTERNATIONALE
:a
Transmissions hydrauliques - Vérins - Logements de
joints d’étanchéité à bagues de guidage pour pistons -
Dimensions et. tolérances
0 Introduction ISO 439411, Transmissions hydrauliques et pneumatiques -
Tubes pour vérins - Partie 7 : Caracteristiques des tubes en
Dans les systémes de transmissions hydrauliques, l’énergie est
acier à alésage de finition spéciale.
transmise et commandée par l’intermédiaire d’un fluide sous
pression circulant en circuit fermé. Les joints d’étanchéité
ISO 5597/1, Transmissions hydrauliques - Joints d’étanchéite
servent a maintenir le fluide sous pression dans les composants
pour tiges de piston et pistons de V&ins hydrauliques à
ayant des élements animés d’un mouvement relatif, par Dimensions et tolerances des logements - Partie I :
piston -
exemple, un mouvement lineaire dans les vérins hydrauliques. Skie normale.
Ces joints d’étanchéité sont utilisés dans des logements
aménagés sur la tige et le piston du vérin. I SO 5598, Transmissions hydrauliques et pneumatiques -
Vocabulaire. 1)
L’ISO 5597/1 fournit les détails des logements pour joints
d’étanchéité de section purement rectangulaire. Toutefois,
3 Définitions
lorsqu’il y a lieu d’utiliser un joint d’étanchéité comportant des
bagues de guidage, le logement est usine en forme de «T)). La
Pour la définition des termes utilisés, voir ISO 5598.
présente Norme internationale concerne spécifiquement de
telles applications.
4 Symboles littéraux
1 Objet et domaine d’application
Les symboles littéraux utilisés dans la présente Norme interna-
tionale sont les suivants :
1.1 La présente Norme internationale fixe les dimensions et
les tolérances correspondantes pour les pistons de vérins
diamétre extérieur du logement de joint (diamètre d’alé-
D=
hydrauliques comportant des bagues de guidage.
sage ou diamétre en fond de gorge pour joints de tige)
1.2 Elle spécifie les dimensions d’une série de logements
S = largeur radiale du logement de joint
pour vérins de 25 à 500 mm de diamétre.
= diamétre intérieur du logement de joint (diamètre de la
dl
tige ou diametre en fond de gorge pour joint de piston)
1.3 II n’est pas prévu dans cette Norme internationale de
préciser les details de construction des joints, car le mode de
= longueur axiale du logement de joint (longueur de la
construction varie avec chaque fabricant. La forme du joint et le 4
gorge pour joint)
matériau utilisé, ainsi que les paliers complémentaires sont
déterminés en fonction des conditions d’emploi, notamment
L* = longueur axiale du logement de la bague de guidage
pression et température.
La = longueur axiale totale du logement de joint et des bagues
1.4 Elle s’applique aux pistons formés d’un assemblage de
de guidage (a ti
...

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