Bsi bs en 04537 2 2009

NORME EUROPÉENNEICS 49.035 English Version Aerospace series - Bushes, flanged in corrosion-resisting steel with self-lubricating liner, elevated load - Part 2: Dimensions and loads - Inc

This British Standard

was published under the

authority of the Standards

Policy and Strategy

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions

of a contract Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

NORME EUROPÉENNE

ICS 49.035

English Version

Aerospace series - Bushes, flanged in corrosion-resisting steel

with self-lubricating liner, elevated load - Part 2: Dimensions and

loads - Inch series

Série aérospatiale - Bagues, à épaulement en acier

résistant à la corrosion à garniture autolubrifiante, charge

élevée - Partie 2: Dimensions et charges - Série en inches

Luft- und Raumfahrt - Buchsen mit Flansch auskorrosionsbeständigem Stahl mit selbstschmierenderBeschichtung, erhöhte Belastung - Teil 2: Maße und

Belastungen - Inch Reihe

This European Standard was approved by CEN on 24 April 2009

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Management Centre: Avenue Marnix 17, B-1000 Brussels

Contents Page

Foreword 3

1 Scope 4

2 Normative references 4

3 Terms and definitions 4

4 Requirements 4

4.1 Configuration, dimensions and mass 4

4.2 Surface roughness 4

4.3 Materials 5

4.4 Surface treatment 5

5 Designation 18

6 Marking 18

7 Technical specification 19

8 Design recommendation 19

Foreword

This document (EN 4537-2:2009) has been prepared by the Aerospace and Defence Industries Association of

Europe - Standardization (ASD-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 ASD,

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 December 2009, and conflicting national standards shall be withdrawn

at the latest by December 2009

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

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom

1 Scope

This standard specifies the characteristics of flanged bushes in corrosion resisting steel with self-lubricating

liner elevated load for aerospace applications

The bushes are intended for use in fixed or moving parts of the aircraft structure and control mechanisms

They shall be used in the temperature range – 55 °C to 163 °C

The following referenced documents are indispensable for the application 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

TR 4475, Aerospace series — Bearings and mechanical transmissions for airframe applications —

ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual

tolerance indications

ISO 8075, Aerospace — Surface treatment of hardenable stainless steel parts

3 Terms and definitions

For the purposes of this document, the terms and definitions given in TR 4475 apply

4 Requirements

4.1 Configuration, dimensions and mass

According to Figures 1 and 2 and Tables 1, 2, 4 and 5 Dimensions apply after surface treatment Dimensions

and tolerances are expressed in millimetres (inches)

General tolerances shall be ISO 2768-m in accordance with ISO 2768-1

4.2 Surface roughness

According to Figures 1 and 2

1) Published as ASD Prestandard at the date of publication of this standard

2) Published as ASD Technical Report at the date of publication of this standard

4.3 Materials

Bush: Stainless steel according to EN 3161

Liner: Self-lubricating wear resistant material consistent with the requirements of EN 2311

4.4 Surface treatment

Code T: Passivation according to ISO 8075

Key

a

Chamfer machined before bonding

b Chamfer or radius at manufacturers option

Figure 1 — Configuration — Type D

− −00,013 − 0,510

max max

0 0,13

0,70 (0.028)

1,60 (0.063)

1,20 (0.047)

0,50

to 0,70 (0.020

to 0.030)

11,140 (0.4386)

20,64 (0.813)

17,506 (0.6892)

28,58 (1.125)

27,038 (1.0645)

41,28 (1.625)

1,00 (0.039)

1,00 (0.039)

16 (1.0000) 25,400 (1.0015) 25,438 (1.1898) 30,221 (1.750) 44,45

18 (1.1250) 28,575 (1.1265) 28,613 (1.3148) 33,396 (1.875) 47,63

2,39 (0.094)

20 (1.2500) 31,750 (1.2515) 31,788 (1.4398) 36,571 (2.000) 50,80

(1.3750)

34,963 (1.3765)

39,746 (1.5648)

53,98 (2.125)

57,208 (2.2523)

69,85 (2.750)

a Diameter code corresponds to nominal diameter d in 1/16 inch

b Min length code 010 or higher

− (−0.0040.016

− )

4,76 5,56 6,35 7,14 7,94 8,73 9,53 11,11 12,70 14,29 15,88 17,46 19,05 22,23 25,40 (0.188) (0.219) (0.250) (0.281) (0.313) (0.344) (0.375) (0.438) (0.500) (0.563) (0.625) (0.688) (0.750) (0.875) (1.000)

a Diameter code corresponds to nominal diameter d in 1/16 inch

b Length code corresponds to length l1 in 1/32 inch

Table 3 — Loads — Type D

Radial load

Axial static load

Diameter code a

Length code

Permissible radial load

Radial load

Axial static load

Radial load

Axial static load

Diameter code a

Length code

Permissible radial load

Radial load

Axial static load

Radial load

Axial static load

Diameter code a

Length code

Permissible radial load

Radial load

Axial static load

— permissible bending stress: 1 350 MPa

— permissible shear stress: 1 200 MPa

Key

b Chamfer or radius at manufacturers option

Figure 2 — Configuration — Type F

Table 4 — Dimensions and tolerances — Type F

− −00,013 −00,51

max max

0 0,13

− ± 0,13

± 2° (−00.001) −00.0005 (−00.020) (−00.005) ( ± 0.005)

(0.2500)

6,388 (0.2515)

9,550 (0.3760)

12,70 (0.500)

0,70 (0.028)

0,70 (0.028)

1,60 (0.063)

0,25 (0.010)

0,50 to 0,75 (0.020 to 0.030)

15°

05 (0.3125) 7,938 (0.3140) 7,976 (0.4386) 11,140 (0.563) 14,29 (0.020) 0,50

06 (0.3750) 9,525 (0.3765) 9,563 (0.5012) 12,730 (0.625) 15,88

0,65 (0.026)

07 (0.4375) 11,113 (0.4390) 11,151 (0.5638) 14,321 (0.750) 19,05

(0.5000)

12,738 (0.5015)

15,913 (0.6265)

22,23 (0.875)

27,038 (1.0645)

31,75 (1.250)

1,00 (0.039)

1,00 (0.039)

16 (1.0000) 25,400 (1.0015) 25,438 (1.1898) 30,221 (1.375) 34,93

18 (1.1250) 28,575 (1.1265) 28,613 (1.3148) 33,396 (1.625) 41,28

2,39 (0.094)

20 (1.2500) 31,750 (1.2515) 31,788 (1.4398) 36,571 (1.750) 44,45

(1.3750)

34,963 (1.3765)

39,746 (1.5648)

47,63 (1.875)

Table 5 — Mass — Type F

−

− (−0.0040.016

− )

4,76 5,56 6,35 7,14 7,94 8,73 9,53 11,11 12,70 14,29 15,88 17,46 19,05 22,23 25,40 (0.188) (0.219) (0.250) (0.281) (0.313) (0.344) (0.375) (0.438) (0.500) (0.563) (0.625) (0.688) (0.750) (0.875) (1.000)

− (−0.0040.016

− )

28,58 31,75 34,93 38,10 41,28 44,45 47,63 50,80 53,98 57,15 60,33 63,50 69,85 (1.125) (1.250) (1.375) (1.500) (1.625) (1.750) (1.875) (2.000) (2.125) (2.250) (2.375) (2.500) (2.750)

a Diameter code corresponds to nominal diameter d in 1/16 inch

b Length code corresponds to length l1 in 1/32 inch

Table 6 — Loads — Type F

Radial load

Axial static load

Diameter code a

Length code

Permissible radial load

Radial load

Axial static load

Radial load

Axial static load

Diameter code a

Length code

Permissible radial load

Radial load

Axial static load

Radial load

Axial static load

Diameter code a

Length code

Permissible radial load

Radial load

Axial static load

— permiss ble bending stress: 1 350 MPa

— permiss ble shear stress: 1 200 MPa

Identity block EN4537-2D04T006

Number of this standard

Type (see Figures 1 and 2)

Diameter code (see Tables 1 and 4)

Surface treatment (see 4.4)

Length code (see Tables 2 and 5)

NOTE If necessary, the code I9005 shall be placed between the description block and the identity block

6 Marking

According to EN 2424 for diameter code < 08 or length code < 008: style G

for diameter code ≥ 08 and length code ≥ 008: style A

Figure 3 — Install recommendation

Hardness of the shaft: 50 HRC min Surface roughness of the shaft: according to Figure 3

The reduction in nominal diameter d (see Figures 1 and 2), due to interference fit of the bush in the housing,

has been taken into account when selecting tolerances for the shaft: f6 (clearance fit)

When applied in actual usage, the coefficient of friction under load could be different from that defined in

EN 2311 since it depends on the following shaft definitions: materials, hardness, surface finish, surface treatment and installation conditions

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