SIST EN 2335:2006

• Abstract:

  This standard specifies the characteristics of spherical plain bearings in corrosion resisting steel, without assembly slot, with or without swaging groove, with or without lubrication holes and grooves, intended for use in fixed or moving parts of aircraft structure and control mechanisms.; They may be used in the temperature range from - 54 °C to 150 °C.; However, as they are lubricated with the following greases (see EN 2337):; - ester type very high pressure grease (code letter A), operating range from - 73 °C to 121 °C or,; - synthetic hydrocarbon type very high pressure grease general purpose (code letter B), operating range from - 54 °C to 177 °C.; Their field of application when lubricated with grease code letter A is limited to 121 °C.

• Status: Published
• Publication Date: 31-Aug-2006
• ICS: 49.035 - Components for aerospace construction
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2006
• Due Date: 01-Sep-2006
• Completion Date: 01-Sep-2006
• Ref Project: EN 2335:2005 - Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly slot - Dimensions and loads

• Replaces: SIST EN 2335:2001 - Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly slot - Dimensions and loads
• Effective Date: 01-Sep-2006
• Replaces: SIST EN 2335:2001/AC1:2001 - Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly slot - Dimensions and loads
• Effective Date: 01-Sep-2006
• Refers: SIST ISO 1132-1:2002 - Rolling bearings -- Tolerances -- Part 1: Terms and definitions
• Effective Date: 25-Aug-2026
• Refers: SIST EN 13522:2004 - Footwear - Test methods for uppers - Tensile strength and elongation
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Refers: SIST-TS CEN/TS 13130-12:2005 - Material and articles in contact with foodstuffs - Plastics substances subject to limitation - Part 12: Determination of 1,3-benzenedimethanamine in food simulants
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2337:2009 - Aerospace series - Spherical plain bearings - Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 6099:2021 - Aerospace series - Rod-end, spherical, plain bearing, metal to metal - Technical specification
• Effective Date: 28-Jan-2026

SIST EN 2335:2006 is the Slovenian adoption of EN 2335:2005 for aerospace spherical plain bearings in corrosion resisting steel without an assembly slot. It specifies dimensions, loads, material, surface treatment and marking for bearings used in aircraft structure and control mechanisms. Engineers, buyers and quality teams use it to select a bearing variant, write a purchase description and check that delivered parts match the agreed configuration.

What does SIST EN 2335:2006 specify?

SIST EN 2335:2006 covers spherical plain bearings in corrosion resisting steel, without assembly slot, with or without swaging groove, and with or without lubrication holes and grooves. The scope ties the standard to fixed or moving parts of aircraft structure and control mechanisms, so it is aimed at aerospace hardware rather than general-purpose bearings.

The document is organized into Scope, Normative references, Terms and definitions, Symbols and abbreviations, Required characteristics, Designation, Marking and Technical specification. The main body is in clauses 5 to 8, and the tables and figures carry the dimensional and load data that define each bearing variant.

What are the key requirements of SIST EN 2335:2006?

Clause 1 sets the intended use and temperature limits. The bearings may be used from -54 °C to 150 °C, but the grease used matters: code letter A limits the application to 121 °C, while code letter B covers a wider temperature range. In practice, the lubricant choice affects where the bearing can be used and what must be stated on the order.

Clause 5.1 defines the configuration, dimensions and masses. Figures 1 to 3 and Table 1 give the bearing variants and the dimensional code structure, and the dimensions apply after surface treatment. For a reader, this means the final treated part must still fit the coded size and shape in the table.

Clause 5.2 gives surface roughness requirements from Figures 1 and 2, and these values apply before surface treatment. That matters because the surface finish has to be controlled at the right production stage, not only on the finished lubricated part.

Clause 5.3 links internal clearances and permissible static loads to the diameter code. Table 2 sets the clearance codes and load values, and the note warns that bearings with swaging grooves may have lower push-out loads than the table values. This is the key selection point when the bearing has to resist a defined load in service.

Clause 5.4 fixes the materials and hardness ranges. The inner ring is specified to EN 2030, while the outer ring uses EN 3490 or EN 3161, with the stated hardness levels before swaging. That gives the buyer a material basis for procurement and inspection.

Clause 5.5 sets the surface treatment: the outer ring gets a dry-film lubricant on the spherical surface according to EN 2491, and the inner ring is passivated according to ISO 8075 with code letter T, or left without that treatment if no code letter is used. In practice, this is what controls corrosion resistance and anti-scoring performance.

Clause 6 defines the designation structure. The identity block combines the standard number, grease code, clearance code, diameter code, lubrication-hole code, swaging-groove code, surface-treatment code and dimensional variety code. That makes the designation usable as a procurement and traceability identifier.

Clause 7 requires marking to EN 2424, style A, with the marking position left to the manufacturer. Clause 8 points to EN 2337 for the technical specification that supports the bearing family.

What terms does SIST EN 2335:2006 define?

• spherical plain bearing - a bearing with spherical sliding contact surfaces, used here for aircraft structure and control mechanisms.
• assembly slot - the standard covers bearings without this slot, so the part is specified as a closed configuration.
• swaging groove - a groove variant that changes the bearing configuration and can affect push-out load behavior.
• lubrication holes and grooves - passages and grooves that help distribute grease through the bearing.
• code letter A - the grease code for ester type very high pressure grease, used where the lower temperature limit matters.
• code letter B - the grease code for synthetic hydrocarbon type very high pressure grease, used when a wider operating range is needed.
• code letter N - the code for normal internal clearance.
• code letter P - the code for reduced internal clearance.
• code letter T - the code used for passivated inner rings.

Who uses SIST EN 2335:2006?

SIST EN 2335:2006 is used by aerospace bearing manufacturers, aircraft designers, procurement teams and quality inspectors. It helps them specify the bearing type, select the right clearance and grease code, and verify material, surface treatment, dimensions and marking for aircraft structure and control mechanisms.

What changed in SIST EN 2335:2006 from the previous edition?

SIST EN 2335:2006 supersedes EN 2335:1988.

Which standards are used with SIST EN 2335:2006?

• ISO 1132-1 - provides the rolling bearing terms and definitions used in Clause 3.
• ISO 8075 - gives the surface treatment method used for inner ring passivation.
• EN 2030 - specifies the steel for the inner ring.
• EN 2337 - provides the technical specification for spherical plain bearings and the grease references used in the scope and designation.
• EN 2424 - gives the marking rules for aerospace products.
• EN 2491 - gives the coating methods for the dry-film lubricant on the outer ring.
• EN 3161 and EN 3490 - specify the steels used for the outer ring.

What does the SIST EN 2335:2006 document contain?

The document includes three bearing configuration figures and two main data tables. Figure 1 and Figure 2 show variants with and without swaging grooves, and Figure 3 shows variants with lubrication holes and grooves. Table 1 gives the dimensional code system, tolerances and masses, while Table 2 gives the internal clearances and permissible static loads used for selection and verification.

Clauses 6 and 7 provide the designation and marking rules, which are the parts most often used in purchasing and traceability. Clause 8 points users to EN 2337 for the technical specification that completes the bearing family requirements.

SLOVENSKI STANDARD
01-september-2006
Aeronavtika – Ležaji, krogelni, drsni, iz korozijsko odpornega jekla brez utora –
Mere in nosilnosti
Aerospace series - Bearings, spherical plain in corrosion resisting steel without assembly
slot - Dimensions and loads
Luft- und Raumfahrt - Gelenklager aus korrosionsbeständigem Stahl ohne Einführnut -
Maße und Belastungen
Série aérospatiale - Rotules lisses en acier résistant a la corrosion sans encoche
d'assemblage - Dimensions et charges
Ta slovenski standard je istoveten z: EN 2335:2005
ICS:
49.035
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 2335
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 49.035 Supersedes EN 2335:1988
English Version
Aerospace series - Bearings, spherical plain in corrosion
resisting steel without assembly slot - Dimensions and loads
Série aérospatiale - Rotules lisses en acier résistant à la Luft- und Raumfahrt - Gelenklager aus
corrosion sans encoche d'assemblage - Dimensions et korrosionsbeständigem Stahl ohne Einführnut - Maße und
charges Belastungen
This European Standard was approved by CEN on 26 October 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2335:2005: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope.4
2 Normative references.4
3 Terms and definitions.4
4 Symbols and abbreviations.5
5 Required characteristics.5
6 Designation.9
7 Marking.9
8 Technical specification.9

Foreword
This European Standard (EN 2335:2005) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
AECMA, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2006, and conflicting national standards shall be withdrawn at
the latest by June 2006.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This European Standard supersedes EN 2335:1988.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
1 Scope
This standard specifies the characteristics of spherical plain bearings in corrosion resisting steel, without
assembly slot, with or without swaging groove, with or without lubrication holes and grooves, intended for use
in fixed or moving parts of aircraft structure and control mechanisms.
They may be used in the temperature range from – 54 °C to 150 °C.
However, as they are lubricated with the following greases (see EN 2337):
 ester type very high pressure grease (code letter A), operating range from – 73 °C to 121 °C or,
 synthetic hydrocarbon type very high pressure grease general purpose (code letter B), operating range
from – 54 °C to 177 °C.
Their field of application when lubricated with grease code letter A is limited to 121 °C.
2 Normative references
The following referenced documents are indispensable for the application of this documen
...