prEN 2288

• Status: Not Published
• Publication Date: 15-Nov-2027
• ICS: 49.030.99 - Other fasteners
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3/S 1 - Parts of Mechanical Systems
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 17-Sep-2026
• Completion Date: 17-Sep-2026
• Ref Project: oSIST prEN 2288:2026 - Aerospace series - Bush, flanged, corrosion resisting steel, with self-lubricating liner - Dimensions and loads

• Revises: EN 2288:2019 - Aerospace series - Bush, flanged, corrosion resisting steel, with self-lubricating liner - Dimensions and loads
• Effective Date: 03-May-2023

prEN 2288 is a draft European Standard from CEN for flanged bushes in corrosion resisting steel with a self-lubricating liner. It specifies the bush dimensions, loads, materials, surface treatment, marking and designation used for aerospace applications. The bushes are intended for interference-fit assembly in fixed and moving aerospace parts over the temperature range of −55 °C to 163 °C.

What does prEN 2288 specify?

prEN 2288 specifies the characteristics of flanged bushes in corrosion resisting steel with a self-lubricating liner, and it also gives a design recommendation for the matching shafts and housings. In practice, this is the document a designer or buyer uses to select a standard bush size and to understand the mounting conditions needed to achieve the stated loads.

The document is organized into nine clauses:

• Clause 1 Scope
• Clause 2 Normative references
• Clause 3 Terms and definitions
• Clause 4 Requirements
• Clause 5 Designation
• Clause 6 Marking
• Clause 7 Technical specification
• Clause 8 Design recommendation
• Clause 9 Quality management system

It also includes Figure 1, Table 1, Table 2, Table 3 and Figure 2.

What are the key requirements of prEN 2288?

Clause 4 sets the main product requirements, and Clauses 5 to 9 cover identification, installation and production control. The most important points are:

• Configuration, dimensions and masses - Clause 4.1 ties the bush geometry to Figure 1 and Table 1, and the masses apply after surface treatment. This matters because the standardized sizes and mass limits define what can be treated as a standard bush.
• Surface roughness - Clause 4.2 requires surface roughness to match Figure 1. That matters because liner performance and fit depend on surface finish.
• Materials - Clause 4.3 requires the bush steel to be selected from EN 3490, EN 3161, 1.4044 per WL1.4044, or an equivalent in TR 4661, and the liner to be a self-lubricating wear-resistant material consistent with EN 2311. This gives the buyer the acceptable material choices and the designer the basis for compatibility.
• Surface treatment - Clause 4.4 allows no surface treatment or code T, where T means passivation to AMS 2700 by Method 1 types 6, 7 or 8, or Method 2. In practice, the designation must show whether the bush is untreated or passivated.
• Designation - Clause 5 uses a fixed-format designation with codes for diameter, length, surface treatment and technology. The technology code identifies a bonded fabric liner, an injection moulded liner, or no code when both are acceptable.
• Marking - Clause 6 requires the identity block from Clause 4 on each bush and its package, with the technology used stated in that block. Small bushes may be marked on the package only, and EN 2424 governs the marking method.
• Design recommendation - Clause 8 says these bushes are intended for interference fit, with housing diameter H7 and shaft diameter f6 in Figure 2, and with shaft hardness of at least 50 HRC. This matters because the load ratings in Table 2 depend on the recommended mounting conditions.
• Quality management system - Clause 9 requires the manufacturer to be an approved production organization for aerospace products and to maintain a quality management system such as EN 9100 or an equivalent aerospace-accepted system.

What terms does prEN 2288 define?

prEN 2288 has no listed terms and definitions in Clause 3, but the document uses several important terms in its requirements:

• Flanged bush - A bush with a flange, used as a bearing or support element in aerospace assemblies.
• Self-lubricating liner - The liner material inside the bush that reduces friction during service.
• Interference fit - A fit in which the bush is installed tightly into the housing so it stays in place under load.
• Passivated - A surface treatment state identified by code T and linked to AMS 2700.
• Technology code - The designation code that identifies the liner technology used, such as bonded fabric liner or injection moulded liner.
• Quality management system (QMS) - The controlled production system the manufacturer must maintain for aerospace supply.

Who uses prEN 2288?

prEN 2288 is used by aerospace designers, component manufacturers, procurement teams, quality managers and test or approval staff. Designers use it to select the bush size, load capability and installation fit; manufacturers use it to make and mark conforming parts; buyers use it to define what they are ordering; and quality teams use it to check material choice, surface treatment and production control.

What changed in prEN 2288 from the previous edition?

prEN 2288 supersedes EN 2288:2019. The foreword states these significant changes:

• normative references updated
• Clause 3 “Terms and definitions” added
• Clause 4 “Requirements” updated with surface treatment requirements
• Clause 4.3 “Materials” updated
• Clause 4.4 “Surface treatment” added
• bibliography updated
• editorial revision

Which standards are used with prEN 2288?

Standard	What it contributes
EN 2311	Technical specification for bushes with self-lubricating liner, and the basis for load definitions
EN 2424	Marking of aerospace products
EN 3161	Acceptable steel option for the bush
EN 3490	Acceptable steel option for the bush
AMS 2700	Passivation requirements for corrosion resisting steels
WL1.4044	Material option for stainless heat-treatable chromium steel
TR 4661	Reference for equivalent materials and surface treatments

Clause 9 also points to EN 9100 as an example of an acceptable aerospace quality management system.

What does the prEN 2288 document contain?

The document contains one configuration figure, one installation recommendation figure, three tables and a bibliography. Figure 1 and Table 1 define the bush geometry, tolerances, recommended sizes and masses. Table 2 gives permissible axial and radial loads for the sizes covered, and Table 3 identifies the technology codes used in designation. Figure 2 shows the shaft and housing arrangement needed to achieve the stated load capability.

SLOVENSKI STANDARD
01-september-2026
Aeronavtika - Puše s prirobnico iz korozijsko odpornega jekla s samomazalno
oblogo - Mere in obremenitve
Aerospace series - Bush, flanged, corrosion resisting steel, with self-lubricating liner -
Dimensions and loads
Luft- und Raumfahrt - Buchse mit Flansch aus korrosionsbeständigem Stahl mit
selbstschmierender Beschichtung - Maße und Belastungen
Ta slovenski standard je istoveten z: prEN 2288
ICS:
49.030.99 Drugi vezni elementi Other fasteners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2026
ICS 49.030.99 Will supersede EN 2288:2019
English Version
Aerospace series - Bush, flanged, corrosion resisting steel,
with self-lubricating liner - Dimensions and loads
Luft- und Raumfahrt - Buchse mit Flansch aus
korrosionsbeständigem Stahl mit selbstschmierender
Beschichtung - Maße und Belastungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 2288:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 4
4.1 Configuration — Dimensions — Masses . 4
4.2 Surface roughness . 4
4.3 Material . 5
4.4 Surface treatment . 5
5 Designation . 9
6 Marking . 10
7 Technical specification . 10
8 Design recommendation . 10
9 Quality management system. 11
Bibliography. 12

European foreword
This document (prEN 2288:2026) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 2288:2019.
— normative references updated;
— Clause 3 “Terms and definitions” added;
— Clause 4 “Requirements” updated with surface treatment requirements;
— 4.3 “Materials” updated;
— 4.4 “Surface treatment” added;
— bibliography updated;
— document editorially revised.
1 Scope
This document specifies the characteristics of flanged bushes in corrosion resisting steel with self-
lubricating liner and the design recommendation of shafts and housings.
The bushes are intended for operation within the temperature range of −55 °C to 163 °C and assembly
with an interference fit into fixed and moving aerospace parts.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2311, Aerospace series — Bushes with self-lubricating liner — Technical specification
EN 2424, Aerospace series — Marking of aerospace products
EN 3161, Aerospace series — Steel FE-PM3801 (X5CrNiCu17-4) — Air melted, solution treated and
precipitation treated, bar a or D ≤ 200 mm, R ≥ 930 MPa
m
EN 3490, Aerospace series — Steel X15CrNi17-3 (1.4057) — Air melted — Hardened and tempered —
Bars for machining — D ≤ 200 mm — 900 MPa ≤ R ≤ 1 100 MPa
e m
AMS 2700, Passivation of Corrosion Resistant Steels
WL1.4044, Stainless heat-treatable chromium steel with about 0.2 C-17 Cr-2 Ni;rods and forgings
TR 4661, Aerospace series — Bearings, flight controls — Materials and surface treatments
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Re
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