bs en1337-2

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d d C C o o p p y y : : N N g g a a P P h h a a m m , , M M a a y y 0 0 3 3 , , 2 2 0 0 0 0 2 2 , , U U n n c c o o n n t t r r o o l l l l e e d d C C o o p p y y , , ( ( c c ) ) B B S S I I

A single copy of this British Standard is licensed to

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on May 03, 2002

This is an uncontrolled copy. Ensure use of the most

current version of this document by searching British

Standards Online at bsonline.techindex.co.uk

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|| || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || || ||

The European Standard EN 1337-2:2000 has the status of a The European Standard EN 1337-2:2000 has the status of a British Standard British Standard ICS 91.010.30; 93.040 ICS 91.010.30; 93.040

Structural bearings Ð

Part 2: Sliding elements

s s e e d d C C o o p p y y : : N N g g a a P P h h a a m m , , M M a a y y 0 0 3 3 , , 2 2 0 0 0 0 2 2 , , U U n n c c o o n n t t r r o o l l l l e e d d C C o o p p y y , , ( ( c c ) ) B B S S I I

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This British Standard, having This British Standard, having been prepared under the been prepared under the direction of the Sector direction of the Sector

Committee for Building and Civil Committee for Building and Civil Engineering, was published under Engineering, was published under the authority of the Standards the authority of the Standards Committee and comes into effect Committee and comes into effect on 15 February 2001

on 15 February 2001

©

©_{BSI 02-2001}_{BSI 02-2001}

Amen

Amendmendments ts issued issued since since publicatpublicationion

Amd

Amd. . No. No. Date Date ComCommentmentss

National foreword

This British Standard is the official English language version of EN 1337-2:2000. This British Standard is the official English language version of EN 1337-2:2000. The UK participation in its preparation was entrusted to Technical Committee The UK participation in its preparation was entrusted to Technical Committee B/522, Structural bearings, which has the responsibility to:

B/522, Structural bearings, which has the responsibility to: Ð

Ð aid enquiraid enquirers to ers to undeunderstarstand the nd the texttext;;

Ð present to the responsible European committee any enquiries on the Ð present to the responsible European committee any enquiries on the

interpretation, or proposals for change, and keep the UK interests informed; interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate Ð monitor related international and European developments and promulgate

them in the UK. them in the UK. A list of

A list of orgaorganizanizations reprtions represenesented on ted on this commithis committee can be ttee can be obtaiobtained on ned on requrequest toest to its secretary.

its secretary.

Cross-references Cross-references

The British Standards which implement international or European publications The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue.

ªFindº facility of the BSI Standards Electronic Catalogue. A British Stand

A British Standard does not ard does not purppurport to ort to incluinclude all de all the necessthe necessary provisary provisions of ions of a a contract. Users of British Standards are responsible for their correct application. contract. Users of British Standards are responsible for their correct application.

Comp

Complianliance witce wit h h a a BritiBritish Standard does not of sh Standard does not of itself confer immunity itself confer immunity from legal obligations.

from legal obligations.

Summary of pages Summary of pages

This document comprises a front cover, an inside front cover, the EN title page, This document comprises a front cover, an inside front cover, the EN title page, page

pages 2 s 2 to 70, to 70, an inside back cover and an inside back cover and a a back coverback cover..

The BSI copyright notice displayed in this document indicates when the document The BSI copyright notice displayed in this document indicates when the document was last issued.

was last issued.

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NORME EUROPÉENNE

EUROPÄISCHE NORM

_{December 2000}

ICS 91.010.30 ICS 91.010.30

English version

Structural bearings - Part 2: Sliding elements

Appareils d'appui structuraux - Partie 2:

Appareils d'appui structuraux - Partie 2: Eléments deEléments de glissement

glissement Lager im Bauwesen - T eil 2: GleitteileLager im Bauwesen - Teil 2: Gleitteile

This European Standard was approved by CEN on

This European Standard was approved by CEN on 18 November 2000.18 November 2000. CEN members are bound

CEN members are bound to comply with the CEN/CENELEC to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Internal Regulations which stipulate the conditions for giving this EuropeanEuropean Standard the status of a

Standard the status of a national standard without any alteration. Up-to-date national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationallists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member.

standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three

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

versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION 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 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 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

Management Centre: Centre: rue rue de de Stassart, Stassart, 36 36 B-1050 BB-1050 Brusselsrussels

© 2000 CEN All rights of exploitatioAll rights of exploitation in any form and by any means reservn in any form and by any means reserveded Ref. No. EN 1337-2:2000 ERef. No. EN 1337-2:2000 E s s e e d d C C o o p p y y : : N N g g a a P P h h a a m m , , M M a a y y 0 0 3 3 , , 2 2 0 0 0 0 2 2 , , U U n n c c o o n n t t r r o o l l l l e e d d C C o o p p y y , , ( ( c c ) ) B B S S I I

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This European Standard shall be given the status of a national standard, either by publication of an identical text 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 2001, and conflicting national standards shall be withdrawn at the latest or by endorsement, at the latest by June 2001, and conflicting national standards shall be withdrawn at the latest by June 2001.

by June 2001.

This European Standard EN 1337 “Structural bearings”, consists of the following 11 Parts: This European Standard EN 1337 “Structural bearings”, consists of the following 11 Parts: Part 1: General design rules

Part 1: General design rules Part 2: Sliding elements Part 2: Sliding elements Part 3: Elastomeric bearings Part 3: Elastomeric bearings Part 4: Roller bearings Part 4: Roller bearings Part 5: Pot bearings Part 5: Pot bearings Part 6: Rocker bearings Part 6: Rocker bearings

Part 7: Spherical and cCylindrical PTFE bearings Part 7: Spherical and cCylindrical PTFE bearings Part 8: Guide bearings and restrain bearings Part 8: Guide bearings and restrain bearings Part 9: Protection

Part 9: Protection

Part 10: Inspection and maintenance Part 10: Inspection and maintenance Part 11: Transport, storage and installation Part 11: Transport, storage and installation

Further to CEN/TC 167’s decision Part 1and 2 form a package of standards and they come into Further to CEN/TC 167’s decision Part 1and 2 form a package of standards and they come into force together, while the other parts come into force separately after the publication of parts 1 and 2. force together, while the other parts come into force separately after the publication of parts 1 and 2. Annexes A, B, C and L are informative. Annexes D, E, F, G, H, J and K are normative.

Annexes A, B, C and L are informative. Annexes D, E, F, G, H, J and K are normative.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

Switzerland and the United Kingdom.

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Introduction Introduction

This standard considers

This standard considers a minimum a minimum operating temperature operating temperature of –35°of –35°C.C. An extension down

An extension down to –40°to –40°C will be C will be considered in a considered in a future amendment.future amendment.

Applications beyond the range of temperature given in clause 1 need special consideration not covered by this Applications beyond the range of temperature given in clause 1 need special consideration not covered by this standard. Characteristics and requirements given in this standard do not apply in such cases.

standard. Characteristics and requirements given in this standard do not apply in such cases. 1

1 SSccooppee

This European Standard specifies the characteristics for the design and manufacture of sliding elements and This European Standard specifies the characteristics for the design and manufacture of sliding elements and guides which are not structural bearings but only parts of them for combination with structural bearings as guides which are not structural bearings but only parts of them for combination with structural bearings as defined in other Parts of this European Standard.

defined in other Parts of this European Standard.

Suitable combinations are shown in Table 1 of EN 1337-1:2000. Suitable combinations are shown in Table 1 of EN 1337-1:2000.

Sliding surfaces with a diameter of the circumscribing circle of single or multiple PTFE sheets less than 75 mm Sliding surfaces with a diameter of the circumscribing circle of single or multiple PTFE sheets less than 75 mm or greater than

or greater than 1500 mm, 1500 mm, or with effective bearinor with effective bearing temperatures g temperatures less than –35°less than –35°C or C or greater than greater than 48°48°C areC are outside the scope of this European Standard.

outside the scope of this European Standard.

Sliding elements for use as temporary devices during construction, for example during launching of the Sliding elements for use as temporary devices during construction, for example during launching of the superstructure, are also outside the scope of this European Standard.

superstructure, are also outside the scope of this European Standard.

In this standard the specification is also given for curved sliding surfaces which are not part of separate sliding In this standard the specification is also given for curved sliding surfaces which are not part of separate sliding elements but which are incorporated in cylindrical or spherical PTFE bearings as per EN 1337.

elements but which are incorporated in cylindrical or spherical PTFE bearings as per EN 1337. NOTE

NOTE The general The general principles detailed in principles detailed in this European Standard may this European Standard may be applied for sliding be applied for sliding elementselements outside this scope, but their suitability for the intended use should be proven.

outside this scope, but their suitability for the intended use should be proven. 2

2 NNoorrmmaattiivve e rreeffeerreenncceess

This European Standard incorporates, by dated or undated reference, provisions from other publications. These This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).

publication referred to applies (including amendments). E

EN N 11333377--11::22000000 SSttrruuccttuurraal l bbeeaarriinnggs s - - PPaarrt t 11: : GGeenneerraal l ddeessiiggn n rruulleess p

prrEEN N 11333377--33::11999966 SSttrruuccttuurraal l bbeeaarriinnggs s - - PPaarrt t 33: : EEllaassttoommeerriic c bbeeaarriinnggss E

EN N 11333377--77 SSttrruuccttuurraal l bbeeaarriinnggs s - - PPaarrt t 77: : SSpphheerriiccaal l aannd d ccyylliinnddrriiccaal l PPTTFFE E bbeeaarriinnggss E

EN N 11333377--99 SSttrruuccttuurraal l bbeeaarriinnggs s – – PPaarrt t 99: : PPrrootteeccttiioonn p

prrEEN N 11333377--1100::11999988 SSttrruuccttuurraal l bbeeaarriinnggs s -- PPaarrt t 1100: : IInnssppeeccttiioon n aannd d mmaaiinntteennaannccee E

EN N 11333377--1111::11999977 SSttrruuccttuurraal l bbeeaarriinnggs s - - PPaarrt t 1111: : TTrraannssppoorrtt, , ssttoorraagge e aanndd Installation

Installation E

ENNV V 11999922--11--11 EEuurrooccoodde e 22: : DDeessiiggn n oof f ccoonnccrreette e ssttrruuccttuurrees s - - PPaarrt t 11--11: : GGeenneerraal l rruullees s aanndd rules for building

rules for building

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E

ENNV V 11999933--11--11 EEuurrooccoodde e 33: : DDeessiiggn n oof f sstteeeel l ssttrruuccttuurrees s - - PPaarrt t 11--11: : GGeenneerraal l rruullees s aannd d rruulleess for building

for building E

EN N 101002025:5:1919990/0/AA1:1:19199933 HHot ot rorolllled ed prprododucucts ts of of nononn-a-allloloy y ststruructcturural al ststeeeells –s –TeTechchninicacal dl delelivivereryy conditions (includes amendment A1:1993)

conditions (includes amendment A1:1993) E

EN N 1100008888--22 SSttaaiinnlleesss s sstteeeells s – – PPaarrt t 22: : TTeecchhnniiccaal l ddeelliivveerry y ccoonnddiittiioonns s ffoor r sshheeeett//ppllaatte e aanndd strip for general purposes

strip for general purposes E

EN N 1100111133--11 HHoott--rroolllleed d pprroodduucctts s iin n wweellddaabblle e ffiinne e ggrraaiin n ssttrruuccttuurraal l sstteeeells s - - PPaarrt t 11: : GGeenneerraall delivery conditions

delivery conditions E

EN N 1100113377--11 PPllaattees s aannd d wwiidde e ffllaatts s mmaadde e oof f hhiiggh h yyiieelld d ssttrreennggtth h ssttrruuccttuurraal l sstteeeells s iin n tthhee quenched and tempered or precipitation hardened conditions – Part 1: quenched and tempered or precipitation hardened conditions – Part 1: General delivery conditions

General delivery conditions E

EN N 1100220044 MMeettaalllliic c pprroodduucctts s - - TTyyppees s oof f iinnssppeeccttiioon n ddooccuummeennttss

IISSO O 552277--22::11999933 PPllaassttiiccs s - - DDeetteerrmmiinnaattiioon n oof f tteennssiille e pprrooppeerrttiiees s - - PPaarrt t 22: : TTeessttiinng g ccoonnddiittiioonns s ffoorr moulding and extrusion plastics

moulding and extrusion plastics

IISSO O 11008833 SSpphheerrooiiddaal l ggrraapphhiitte e ccaasst t iirroon n - - CCllaassssiiffiiccaattiioonn

IISSO O 11118833 PPllaassttiiccs s - - MMeetthhoodds s ffoor r ddeetteerrmmiinniinng g tthhe e ddeennssiitty y aannd d rreellaattiivvee density of non-cellular plastics

density of non-cellular plastics

IISSO O 22003399--11 PPllaassttiiccs s - - DDeetteerrmmiinnaattiioon n oof f hhaarrddnneesss s - - PPaarrt t 11: : BBaalll l iinnddeennttaattiioon n mmeetthhoodd IISSO O 22113377 PPeettrroolleeuum m pprroodduucctts s - - LLuubbrriiccaattiinng g ggrreeaasse e aannd d ppeettrroollaattuum m

--Determination of cone penetration Determination of cone penetration

IISSO O 22117766 PPeettrroolleeuum m pprroodduucctts s - - LLuubbrriiccaattiinng g ggrreeaasse e - - DDeetteerrmmiinnaattiioon n oof f ddrrooppppiinng g ppooiinntt IISSO O 22440099 PPaaiinntts s aannd d vvaarrnniisshhees s - - CCrroossss--ccuutt--tteesstt

IISSO O 33001166 PPeettrroolleeuum m pprroodduucctts s - - DDeetteerrmmiinnaattiioon n oof f ppoouur r ppooiinntt

IISSO O 33552222 CCaasst t aalluummiinniiuum m aallllooyys s - - CChheemmiiccaal l ccoommppoossiittiioon n aannd d mmeecchhaanniiccaal l pprrooppeerrttiieess IISSO O 33775555 CCaasst t ccaarrbboon n sstteeeells s ffoor r ggeenneerraal l eennggiinneeeerriinng g ppuurrppoosseess

IISSO O 44228877 GGeeoommeettrriiccaal l pprroodduucct t SSppeecciiffiiccaattiioonns s ((GGPPSS) ) – – SSuurrffaacce e tteexxttuuttee: : PPrrooffiille e mmeetthhoodd – Terms, definitioons and surface texture parameters

– Terms, definitioons and surface texture parameters IISSO O 66115588 MMeettaalllliic c ccooaattiinnggs s - - EElleeccttrrooppllaatteed d ccooaattiinnggs s oof f cchhrroommiiuum m ffoorr

engineering purposes engineering purposes

IISSO O 66550066 MMeettaalllliic c mmaatteerriiaalls s – – BBrriinneelll l hhaarrddnneesss s tteesstt

IISSO O 66550077--11 MMeettaalllliic c mmaatteerriiaalls s – – VViicckkeerrs s hhaarrddnneesss s tteesst t - - PPaarrt t 11: : TTeesst t mmeetthhoodd

IISSO O 66550077--22 MMeettaalllliic c mmaatteerriiaalls s - - VViicckkeerrs s hhaarrddnneesss s tteesst t - - PPaarrt t 22: : VVeerriiffiiccaattiioon n oof f tteessttiinngg machine machine s s e e d d C C o o p p y y : : N N g g a a P P h h a a m m , , M M a a y y 0 0 3 3 , , 2 2 0 0 0 0 2 2 , , U U n n c c o o n n t t r r o o l l l l e e d d C C o o p p y y , , ( ( c c ) ) B B S S I I

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3

3 TeTermrms s anand d dedefifininititionons, s, sysymbmbolols s anand d ababbrbreveviaiatitiononss 3

3..11 TTeerrmms s aannd d ddeeffiinniittiioonnss

For the purposes of this European Standard, the following terms and definitions apply. For the purposes of this European Standard, the following terms and definitions apply. 3.1.1

3.1.1

backing plate backing plate

metallic component which supports sliding materials metallic component which supports sliding materials 3.1.2

3.1.2

coefficient of friction coefficient of friction

ratio of lateral force (resisting force) to the normal force. ratio of lateral force (resisting force) to the normal force. 3.1.3

3.1.3

composite material composite material

sliding material used in guides. sliding material used in guides. 3.1.4

3.1.4 guide guide

sliding element which restrains a sliding bearing from moving in one axis. sliding element which restrains a sliding bearing from moving in one axis. 3.1.5

3.1.5

hard chromium surface hard chromium surface

steel backing element plated with a hard chromium layer. steel backing element plated with a hard chromium layer. 3.1.6

3.1.6 lubricant lubricant

special grease used to reduce the friction and wear in the sliding surfaces. special grease used to reduce the friction and wear in the sliding surfaces. 3.1.7

3.1.7

mating surface mating surface

hard smooth metallic surface against which the PTFE or composite materials slide. hard smooth metallic surface against which the PTFE or composite materials slide. 3.1.8

3.1.8

polytetrafluoroethylene (PTFE) polytetrafluoroethylene (PTFE)

a thermoplastic material used for its low coefficient of friction. a thermoplastic material used for its low coefficient of friction. 3.1.9

3.1.9

sliding surface sliding surface

combination of a pair of flat or curved surfaces of different materials which allow relative displacements. combination of a pair of flat or curved surfaces of different materials which allow relative displacements.

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3.1.10 3.1.10

sliding materials sliding materials

materials which form sliding surfaces. materials which form sliding surfaces. 3

3..22 SSyymmbboollss

The most frequently occurring symbols are defined below. Those that are local, and unique to a particular The most frequently occurring symbols are defined below. Those that are local, and unique to a particular clause, are defined at their first appearance.

clause, are defined at their first appearance. 3.2

3.2.1.1 LatLatin uin upper pper case case letlettersters A

A cocontntacact art area oea of slf slididining sug surfrfacacee ... mmmm22 E

E momodudululus s of of elelasastiticicity .ty ... GPGPaa F

F acactitionon; fo; forcrce ...e ... N; N; kNkN G

G pepermrmananenent at actctioion .n ... N; N; kNkN L

L ddiiaammeetteer or of tf thhe ce ciirrccuummssccrriibbiinng cg ciirrcclle oe of sf siinngglle oe or mr muullttiippllee PTFE sheets (see Figures 3, 4 and 5); length of PTFE or PTFE sheets (see Figures 3, 4 and 5); length of PTFE or composite materials

composite materials sheets of sheets of guides (see guides (see Figure 6) Figure 6) ... mmmm M

M bebendndining mg momomenent .t ... NNxx mm; kN mm; kN xx m m

N

N axaxiial al foforcrce; e; foforcrce e nnorormamal l to to prpriincncipipaal l bbeaeariring ng susurfrfacace e ... NN; ; kNkN R

Ry5iy5i average surface roughness ...average surface roughness ...



mm

S

S sshhaappe e ffaaccttoorr T

T tetempmpererataturure e ... °°CC V

V trtranansvsvererse se or or shsheaear r foforcrce ...e ... N; N; kNkN 3.2

3.2.2.2 LatiLatin lon lower cwer case lase lettettersers a

a ssmmaalllleesst t ddiimmeennssiioon n oof f PPTTFFE E sshheeeettss;; minor side

minor side of rectangular pof rectangular plates or lates or sheets sheets ... mmmm b

b mamajojor r siside de of of rerectctanangugullar ar pplalatetes s or or shsheeeets .ts ... mmmm c

c cclleeaarreeanance ce bebetwtweeeen n sslliiddiinng g cocompmpoonneenntts s (d(diiffffeerreenncce e iin n wwididtth h bbeetwtweeeen n kekeyy and

and keyway)keyway) ... mmmm d

d didiamameteterer, , didiagagononal al ... mmmm e

e ececcecentntriricicity .ty ... mmmm ff nonomiminanal l cocompmpreressssiivve e ststrerengngth th ... MPMPaa h

h prprototrurusision on of of PTPTFE FE shsheeeet t frfroom m iits ts rerececessss... mmmm n

n nnuummbbeer r oof f ccyycclleess s

s slslididining g didiststanance ce ... mmmm tt ththicicknknesess, s, titime me ... mmmm; ; s; s; hh u

u peperirimemeteter r oof f PPTFTFE sheE sheet..et... mmmm v

v slslididining g spspeeeed d ... mmmm/s/s w

w ddeeffoorrmmaattiioonn x

x lloonnggiittuuddiinnaal l aaxxiiss y

y ttrraannssvveerrsse e aaxxiiss

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z

z aaxxiis s nnoorrmmaal l tto o tthhe e pprriinncciipplle e bbeeaarriinng g ssuurrffaaccee 3.

3.2.2.33 GreGreek ek lelettettersrs



angle...angle... radrad



partial safety factorpartial safety factor



elongation at elongation at break ...break ... %%



zz mmaaxxiimmuum m ddeevviiaattiioon n oof f ppllaanne e oor r ccuurrvveed d sslliiddiinngg surfaces

surfaces from theoretical from theoretical surface ...surface ... mmmm



ratio, coefficientratio, coefficient



coefficient of frictioncoefficient of friction



11 initial coefficient of friction; i.e. the maximum coefficient of friction occurring during the firstinitial coefficient of friction; i.e. the maximum coefficient of friction occurring during the first

movement at the start or restart of any test movement at the start or restart of any test



TT maximum coefficient of friction during a given temperature phasemaximum coefficient of friction during a given temperature phase



mass mass density ...density ... kg/mkg/m33



normal normal pressure ...pressure ... MPaMPa 3.

3.2.2.44 SuSubsbscricriptspts a

a aavveerraaggee

b

b bbaacckkiinng g ppllaattee c

c ccoonnccrreettee

C

CMM ccoommppoossiitte e mmaatteerriiaallss d d ddeessiiggnn d dyynn ddyynnaammiicc G G ppeerrmmaanneennt t aaccttiioonn g g ggeeoommeettrriiccaall k

k cchhaarraacctteerriissttiicc M

M mmaatteerriiaall

m

maaxx mmaaxxiimmuumm m

miinn mmiinniimmuumm n n ccyycclle e nnuummbbeerr p p PPTTFFEE p pll pprreellooaadd Q

Q vvaarriiaabblle e aaccttiioonn R

R rreessiissttaannccee

rr rreedduucceedd

S

S iinntteerrnnaal l ffoorrccees s aannd d mmoommeenntts s ffrroom m aaccttiioonnss s

s ssttaattiicc

tt tteennssiioonn

T

T tteemmppeerraattuurree u

u uullttiimmaattee

x

x, , yy, , zz ccoooorrddiinnaatteess

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3

3..33 AAbbbbrreevviiaattiioonnss C

CMM CCoommppoossiitte e MMaatteerriiaall P

PTTFFEE PPoollyytteettrraafflluuoorrooeetthhyylleennee

4

4 FFuunnccttiioonnaal l rreeqquuiirreemmeennttss NOTE

NOTE Sliding elements and Sliding elements and guides permit movements in guides permit movements in plane or curved sliding surfaces wplane or curved sliding surfaces with a minimumith a minimum of friction. Specific verification of frictional resistance is required, as verification of mechanical and physical of friction. Specific verification of frictional resistance is required, as verification of mechanical and physical properties alone is

properties alone is not sufficient not sufficient to ensure that to ensure that these components will have the these components will have the required characteristics.required characteristics. The performance of the sliding elements and guides is deemed to be satisfactory if standardized The performance of the sliding elements and guides is deemed to be satisfactory if standardized specimens shown in annex D of specified material combinations meet the requirements of this clause specimens shown in annex D of specified material combinations meet the requirements of this clause when tested as specified in specific friction tests described in annex D

when tested as specified in specific friction tests described in annex D 4.

4.11 SlSlididining eleg elemements ants and gund guidides ines incocorporporatratining slig slididing sung surfrfaceaces wits with PTFh PTFE shE sheeeetsts 4.1.1

4.1.1 RequireRequirements ments in sin short tehort term frrm friction iction teststests

The coefficients of friction in each phase of friction testing shall not exceed the values given in Table 1. The coefficients of friction in each phase of friction testing shall not exceed the values given in Table 1.

Table

Table 1 1 -- Maximum Maximum coefficcoefficients oients of frictf friction in shoion in short term tesrt term tests of PTFE ts of PTFE sheetssheets in combination with hard chromium plating, austenitic steel or in combination with hard chromium plating, austenitic steel or aluminium alloy used for curved or plane sliding surfaces.

aluminium alloy used for curved or plane sliding surfaces. Test

Test See annex D See annex D

T

Teemmppeerraattuurree HaHarrd d cchhrroommiiuum m oorr austenitic steel austenitic steel Aluminium Aluminium alloy alloy



_s,1_s,1



_dyn,1_dyn,1



_s,T_s,T



_dyn,T_dyn,T



_s,1_s,1



_dyn,1_dyn,1



_s,T_s,T



_dyn,T_dyn,T

C C + + 221 1 °°CC 00,,001122 00,,000055





00,,001188 00,,000088





D D - - 335 5 °°CC 00,,003355 00,,002255





00,,005533 00,,003388





E E 0 0 °°CC 00,,001188 00,,001122





00,,002277 00,,001188





E E - - 335 5 °°CC





00,,001188 00,,001122





0,,0002277 00,,001188 NOTE

NOTE



s,1s,1 is is the the static static coefficient coefficient of of friction friction at at the the first first cycle.cycle.



dyn,1dyn,1 is the is the dynamic coefficient dynamic coefficient of friction at of friction at the first cyclthe first cycle.e.



s,Ts,T is is the the static static coefficient coefficient of of friction friction at at subsequent subsequent cycles.cycles.



dyn,Tdyn,T is the is the dynamic coefficient dynamic coefficient of friction at of friction at subsequent cycles.subsequent cycles.

(see also annex D, Figures D.4 and D.6) (see also annex D, Figures D.4 and D.6) 4.1.2

4.1.2 RequireRequirements ments in loin long terng term frm friction iction teststests

The coefficients of friction of the sliding material combinations shall not exceed the values listed in Tables 2 and The coefficients of friction of the sliding material combinations shall not exceed the values listed in Tables 2 and 3.

3. 4.

4.22 GuGuidides ies incncororpoporaratiting cng comompoposisite mte matatereriaials Cls CM1 aM1 and Cnd CM2M2 4.2.1

4.2.1 RequireRequirements ments in shorin short term t term friction friction testtest

The maximum static or dynamic coefficient of friction shall not exceed 0,15. The maximum static or dynamic coefficient of friction shall not exceed 0,15.

(13)

Table

Table 2 2 -- The coefficiThe coefficients of friction in long term tests of PTFE sheets inents of friction in long term tests of PTFE sheets in combination with austenitic steel used for plane sliding surfaces.

combination with austenitic steel used for plane sliding surfaces.

Temperature

Temperature Total slide pathTotal slide path

5

5113322mm 1100224422mm



_s,T_s,T



_dyn,T_dyn,T



_s,T_s,T



_dyn,T_dyn,T

--3355°°CC 00,,003300 00,,002255 00,,005500 00,,004400 --2200°°CC 00,,002255 00,,002200 00,,004400 00,,003300 0 0°°CC 00,,002200 00,,001155 00,,002255 00,,002200 + +2211°°CC 00,,001155 00,,001100 00,,002200 00,,001155 NOTE

NOTE



s,Ts,T and and



dyn,Tdyn,T are the static and dynamic coefficient of friction respectively at the are the static and dynamic coefficient of friction respectively at the

relevant temperatures. relevant temperatures.

Table 3

Table 3 -- Maximum coeMaximum coefficiefficients of friction in long term tests of PTFE shents of friction in long term tests of PTFE sheets inets in combination with hard chromium plating, austenitic steel or combination with hard chromium plating, austenitic steel or aluminium alloy used for curved sliding surfaces.

aluminium alloy used for curved sliding surfaces.

Temperature

Temperature Total slide path 2 066 mTotal slide path 2 066 m

A

Auusstteenniittiic c sstteeeel l oor r hhaarrd d cchhrroommiiuumm AAlluummiinniiuum m aallllooyy



s,Ts,T



dyn,Tdyn,T



s,Ts,T



dyn,Tdyn,T

--3355°°CC 00,,003300 00,,002255 00,,004455 00,,003388 --2200°°CC 00,,002255 00,,002200 00,,003388 00,,003300 0 0°°CC 00,,002200 00,,001155 00,,003300 00,,002222 + +2211°°CC 00,,001155 00,,001100 00,,002222 00,,001155 4.2.2

4.2.2 RequireRequirements ments in loin long terng term frm friction iction testtest

Maximum static or dynamic coefficients of friction shall not exceed the values listed in Table 4. Maximum static or dynamic coefficients of friction shall not exceed the values listed in Table 4.

(14)

Table

Table 4 4 -- Maximum staMaximum static or dynamic coeftic or dynamic coefficientficients of frictions of friction TT in long in long

term tests of composite material CM1 and CM2 in combination term tests of composite material CM1 and CM2 in combination with austenitic steel used for plane sliding surfaces in guides with austenitic steel used for plane sliding surfaces in guides

Temperature

Temperature Total slide pathTotal slide path

2 066 m 2 066 m



TT --3355°°CC 00,,220000 --2200°°CC 00,,115500 0 0°°CC 00,,110000 + +2211°°CC 00,,007755 5

5 MMaatteerriiaal l pprrooppeerrttiieess

In the absence of specific Standards, material testing shall be in accordance with the procedures given in In the absence of specific Standards, material testing shall be in accordance with the procedures given in annexes D to H.

annexes D to H. 5

5..11 PPTTFFE E sshheeeettss 5.1

5.1.1.1 MateMateriarial spel specifcificaticationion

The raw material for PTFE sheets shall be pure polytetrafluoroethylene free sintered without regenerated or filler The raw material for PTFE sheets shall be pure polytetrafluoroethylene free sintered without regenerated or filler materials.

materials. 5.1.2

5.1.2 MechanicMechanical al and and physicaphysical l propertiepropertiess

The characteristics of PTFE shall be in accordance with Table 5. The characteristics of PTFE shall be in accordance with Table 5.

Table 5 - Mechanical and physical properties of PTFE. Table 5 - Mechanical and physical properties of PTFE.

P

Prrooppeerrttyy TTeessttiinng g SSttaannddaarrdd RReeqquuiirreemmeenntt m

maasss s ddeennssiittyy IISSO O 11118833



pp = = 2211440 0 tto o 22220000 kkgg//mm 3 3

tteennssiille e ssttrreennggtthh IISSO O 552277--22 ffptkptk= = 29 29 to to 40 40 MPaMPa

e

elloonnggaattiioon n aat t bbrreeaakk IISSO O 552277--22



pp



3 30000 %%

b

baalll l hhaarrddnneessss IISSO O 22003399--11 HH113322//660 0 = = 223 3 tto o 333 3 MMPPaa

The test specimens shall be prepared from fully finished sheet but without impressed dimples. They shall be The test specimens shall be prepared from fully finished sheet but without impressed dimples. They shall be tested

tested at 2at 23°3°CC



2°C. 2°C.

Mass density shall be determined on three specimens. Mass density shall be determined on three specimens.

(15)

Tensile strength test and elongation at break shall be conducted on five specimens type 1 (in accordance with Tensile strength test and elongation at break shall be conducted on five specimens type 1 (in accordance with Figure 1 of ISO 527-2:1993). The thickness of the specimens shall be 2 mm

Figure 1 of ISO 527-2:1993). The thickness of the specimens shall be 2 mm



0,2 mm and the speed of testing 0,2 mm and the speed of testing shall be 50 mm/min (speed E as defined in ISO 527-2).

shall be 50 mm/min (speed E as defined in ISO 527-2).

A total of 10 ball hardness tests shall be conducted using at least three specimens with a minimum of three tests A total of 10 ball hardness tests shall be conducted using at least three specimens with a minimum of three tests per specimen ; the thickness of the specimens shall be at least 4,5 mm.

per specimen ; the thickness of the specimens shall be at least 4,5 mm. All specimens shall pass all the tests conducted on them.

All specimens shall pass all the tests conducted on them. 5.1

5.1.3.3 GeomGeometretrical ical propropertpertiesies 5.

5.1.1.3.3.11 ToTolelerarancnce oe on thn thicicknknesesss

The admissible tolerance on thickness of single PTFE sheets or associated multiple sheets is

The admissible tolerance on thickness of single PTFE sheets or associated multiple sheets is ₀₀0,30,3mmmm or sheets or sheets with a diameter L less than 1200 mm and

with a diameter L less than 1200 mm and ₀₀0,40,4mmmm for larger sheets.for larger sheets. 5.

5.1.1.3.3.22 DDimimpple le papatttterernn

Dimples and dimple pattern shall be in accordance with Figure 1. Dimples and dimple pattern shall be in accordance with Figure 1.

Where dimples are produced by hot pressing, the temperature during the pressing process shall not exceed Where dimples are produced by hot pressing, the temperature during the pressing process shall not exceed 200°C. 200°C. Dimensions in millimetres Dimensions in millimetres Key Key 1

1 main main direction direction of of slidingsliding

Figure 1 - Pattern of dimples in recessed PTFE sheets Figure 1 - Pattern of dimples in recessed PTFE sheets

(16)

5.1

5.1.4.4 SuiSuitabtabiliility as slidity as sliding mateng materialrial

PTFE shall be tested in accordance with annex D and shall meet the requirements of 4.1.1 and 4.1.2. PTFE shall be tested in accordance with annex D and shall meet the requirements of 4.1.1 and 4.1.2. Lubricant shall be in accordance with 5.7.

Lubricant shall be in accordance with 5.7.

The mating surfaces for the short term friction test shall be austenitic steel or hard chromium and for the long The mating surfaces for the short term friction test shall be austenitic steel or hard chromium and for the long term friction test austenitic steel in accordance with 5.3 and 5.4.

term friction test austenitic steel in accordance with 5.3 and 5.4. 5

5..22 CCoommppoossiitte e mmaatteerriiaallss 5.2

5.2.1.1 ComComposposite ite matmateriaerial CM1l CM1

This is a composite material consisting of three layers: a bronze backing strip and a sintered interlocking porous This is a composite material consisting of three layers: a bronze backing strip and a sintered interlocking porous matrix, impregnated and overlaid with a PTFE / lead mixture.

matrix, impregnated and overlaid with a PTFE / lead mixture. The material shall conform to the characteristics listed in Table 6. The material shall conform to the characteristics listed in Table 6.

In addition, the condition of the material and its surface finish shall be checked visually. In addition, the condition of the material and its surface finish shall be checked visually.

Table 6 - Characteristics of CM1. Table 6 - Characteristics of CM1. B

Brroonnzze e bbaacckkiinngg mmaatteerriiaall: : CCuuSSn n 66 c coommppoossiittiioon n bby y mmaassss SSnn 5 5 tto o 77,,5500 %% P P



00,,3355 %% Pb Pb



00,,1100 %% Fe Fe



00,,1100 %% Zn + Ni Zn + Ni



00,,3300 %% Remainder Cu Remainder Cu tthhiicckknneessss ((22,,11



0 0,,1155)) mmmm h

haarrddnneesss s HHB B - - IISSO O 66550066 880 0 tto o 116600 B

Brroonnzze ie inntteerrllaayyeerr mamatteerriiaall: : CCuuSSn n 1100 c coommppoossiittiioon n bby y mmaassss SSnn 110 0 tto o 1122 %% Pb Pb



11,,0000 %% P P 00,,2255ttoo00,,44 %% Si Si



00,,1177 %% Fe Fe



00,,1155 %% Ni Ni



00,,1155 %%

saturation with PTFE - Pb



2525 %%

thickness thickness

0,0

0,15

+

0,25

mmmm S

Suurrffaacce e llaayyeerr mmaatteerriiaall: : PPTTFFEE//PPbb c

coompmpoossiittiioon n bby y vvoolluumeme PPb b 220 0 %%, , rreemamaiinnddeer r PPTTFFEE thickness thickness

0,0

0,02

+

0,01

mmmm total thickness total thickness

0,0

0,1

+

2,4

mmmm o

ovveerrllaay y aaddhheessiioon n - - IISSO O 22440099 GGT T 22

(17)

5.2

5.2.2.2 ComComposposite ite matmateriaerial CM2l CM2

The material shall consist of a flexible metal mesh which is sintered into a PTFE compound with the bearing or The material shall consist of a flexible metal mesh which is sintered into a PTFE compound with the bearing or sliding surface having the thicker PTFE coat.

sliding surface having the thicker PTFE coat.

The metal mesh shall be CuSn6 stabilised mesh from 0,25 mm diameter wires which are linked at intersections The metal mesh shall be CuSn6 stabilised mesh from 0,25 mm diameter wires which are linked at intersections and which has a thickness after calendering of approximately 0,4 mm. The mesh count in warp and weft and which has a thickness after calendering of approximately 0,4 mm. The mesh count in warp and weft direction shall be 16

direction shall be 16



1 per 10 mm. 1 per 10 mm.

The PTFE compound shall be PTFE with 30%



2% filler content, consisting of glass fibres and graphite. 2% filler content, consisting of glass fibres and graphite. The material is to conform to the characteristics listed in Table 7.

The material is to conform to the characteristics listed in Table 7.

In addition, the condition of the material and its surface finish shall be checked visually. In addition, the condition of the material and its surface finish shall be checked visually.

Table 7 - Characteristic of CM2. Table 7 - Characteristic of CM2. D Deennssiittyy 44110000kkgg//mm33to 4400 kg/mto 4400 kg/m33 T Teennssiille e ssttrreennggtthh > > 445 5 MMPPaa E Elloonnggaattiioonn >> 1100%% T Thhiicckknneessss ((00,,4488



0,2) mm 0,2) mm

Overlay adhesion (in accordance with ISO Overlay adhesion (in accordance with ISO 2409)

2409)

GT2 GT2

5.2

Composite materials CM1 and CM2 shall be tested in accordance with annex D and shall meet the requirements Composite materials CM1 and CM2 shall be tested in accordance with annex D and shall meet the requirements of 4.2.1 and 4.2.2.

of 4.2.1 and 4.2.2.

The mating austenitic steel sheet and the lubricant to be used in the test shall both be in accordance with this The mating austenitic steel sheet and the lubricant to be used in the test shall both be in accordance with this European Standard.

European Standard. 5

5..33 AAuusstteenniittiic sc stteeeel sl shheeeett 5.3

5.3.1.1 MateMateriarial spel specifcificaticationion Steel in accordance w

Steel in accordance with EN 10088-2 ith EN 10088-2 1.4401 + 2B shal1.4401 + 2B shall be used.l be used.

The contact surface shall be ground and if necessary machine polished. The contact surface shall be ground and if necessary machine polished. 5.3

5.3.2.2 SurSurface cface charaharactercteristiisticscs

After the surface treatment the roughness R

After the surface treatment the roughness Ry5iy5i shall not exceed 1 shall not exceed 1



m in accordance with ISO 4287 and them in accordance with ISO 4287 and the

hardness shall be in the range 150 HV1 to 220 HV1, according to ISO 6507-2. hardness shall be in the range 150 HV1 to 220 HV1, according to ISO 6507-2. 5

5..44 HHaard rd cchrhromomiium um ppllaateted sd sururfafacceess

The entire curved surface of the backing plate shall be hard chromium plated. The entire curved surface of the backing plate shall be hard chromium plated.

The hard chromium plating process shall comply with the requirements of ISO 6158. The hard chromium plating process shall comply with the requirements of ISO 6158.

(18)

5.4

5.4.1.1 MateMateriarial spel specifcificaicationtion

The substrate for hard chromium plated sliding surfaces shall be steel in accordance with EN The substrate for hard chromium plated sliding surfaces shall be steel in accordance with EN 10025:1990/A1:1993 grade S 355 J2G3 or fine grain steel of the same or higher grade in accordance with EN 10025:1990/A1:1993 grade S 355 J2G3 or fine grain steel of the same or higher grade in accordance with EN 10113-1.

10113-1.

Hard chromium plating shall be free from cracks and pores. Hard chromium plating shall be free from cracks and pores.

The surface of the base material shall be free from surface porosity, shrinkage cracks and inclusions. The surface of the base material shall be free from surface porosity, shrinkage cracks and inclusions. Small defects may be repaired e.g. by pinning prior to hard chromium plating.

Small defects may be repaired e.g. by pinning prior to hard chromium plating. 5.4

5.4.2.2 SurSurface cface charaharactercteristiisticscs 5

5..44..2.2.11 RRoouughghnneessss

The final surface roughness R

The final surface roughness Ry5iy5i in accordance with ISO 4287 of the plated surface shall not exceed 3 in accordance with ISO 4287 of the plated surface shall not exceed 3



m.m.

NOTE

NOTE Both the bBoth the base material and ase material and hard chromium plating may hard chromium plating may be polished to be polished to achieve the specifiedachieve the specified surface roughness.

surface roughness. 5

5..44..2.2.22 ThThiiccknkneessss

The thickness of the hard chromium plating shall be at least 100



m.m.

5.

5.4.4.2.2.33 ViVisusual al ininspspecectitionon

The hard chromium surface shall be visually inspected for cracks and pores. The hard chromium surface shall be visually inspected for cracks and pores. 5.

5.4.4.2.2.44 FeFerrrroxoxyyl l tetestst

In addition to the visual inspection, the absence of defects shall be verified by a Ferroxyl test in accordance with In addition to the visual inspection, the absence of defects shall be verified by a Ferroxyl test in accordance with Annex E.

Annex E.

If the visual inspection of the surfaces reveals any potential defects, the Ferroxyl test shall be applied over the If the visual inspection of the surfaces reveals any potential defects, the Ferroxyl test shall be applied over the entire affected area.

entire affected area.

If any defects are detected by Ferroxyl test, the hard chrome plating shall be rejected. If any defects are detected by Ferroxyl test, the hard chrome plating shall be rejected. 5.

5.55 FeFerrrrouous ms matatereriaials ls fofor br bacackiking ng plplatateses

Steel plates in accordance with EN 10025:1990/A1:1993 or EN 10137-1, cast iron in accordance with ISO 1083, Steel plates in accordance with EN 10025:1990/A1:1993 or EN 10137-1, cast iron in accordance with ISO 1083, cast carbon steel in accordance with ISO 3755 or stainless steel in accordance with EN 10088 shall be used for cast carbon steel in accordance with ISO 3755 or stainless steel in accordance with EN 10088 shall be used for the backing plates with flat or curved surfaces, as appropriate.

the backing plates with flat or curved surfaces, as appropriate. 5

5..66 AAlluummiinniiuum m aallllooyy 5.6.1

5.6.1 Material Material specispecification fication for bacfor backing king platesplates

Aluminium alloy may be used only for the convex element of spherical or cylindrical PTFE bearings Aluminium alloy may be used only for the convex element of spherical or cylindrical PTFE bearings The alloy shall be Al-Mg6M or Al-Si7MgTF in accordance with the requirements of ISO 3522. The alloy shall be Al-Mg6M or Al-Si7MgTF in accordance with the requirements of ISO 3522. 5.6

5.6.2.2 SurSurface face treatreatmentmentt

The curved surface shall be anodized after machining. The curved surface shall be anodized after machining. The minimum average thickness of the coating shall be 15

The minimum average thickness of the coating shall be 15



m.m.

The minimum local thickness of the coating shall be 14



m.m.

Thickness measurements shall be carried out according to the method described in annex F. Thickness measurements shall be carried out according to the method described in annex F. The surface may be polished if necessary to achieve the finish required in 5.6.3.

The surface may be polished if necessary to achieve the finish required in 5.6.3. 5.6.3

5.6.3 CharactCharacteristiceristics s of sof sliding liding surfacessurfaces The surface roughness R

The surface roughness Ry5iy5i after anodizing shall not exceed 3 after anodizing shall not exceed 3



m in accordance with ISO 4287.m in accordance with ISO 4287.

(19)

The surface shall be free from injurious defects, such as cracks and significant porosity. The surface shall be free from injurious defects, such as cracks and significant porosity. 5.6

Aluminium alloy shall be tested in accordance with annex D and meet the requirements of 4.1. Aluminium alloy shall be tested in accordance with annex D and meet the requirements of 4.1. 5

5..77 LLuubbrriiccaanntt NOTE

NOTE The purpose of the lubricant is to reduce the frictional The purpose of the lubricant is to reduce the frictional resistance and wear of the PTFE.resistance and wear of the PTFE. 5.7

5.7.1.1 GeneGeneral ral ReqRequireuirementmentss

Lubricant shall retain its properties within the specified temperature range and shall not resinify nor attack other Lubricant shall retain its properties within the specified temperature range and shall not resinify nor attack other materials at the sliding interface.

materials at the sliding interface. 5.

5.7.7.22 PrPropeopertirtieses

The characteristics of lubricant shall be in accordance with Table 8. The characteristics of lubricant shall be in accordance with Table 8.

An IR spectral analisis shall be carried out for the purpose of identification. An IR spectral analisis shall be carried out for the purpose of identification.

Table 8 - Physical and chemical properties of lubricant. Table 8 - Physical and chemical properties of lubricant. P

Prrooppeerrttiieess TTeessttiinng g ssttaannddaarrdd RReeqquuiirreemmeennttss W

Woorrkkeed d ppeenneettrraattiioonn IISSO O 21213377 2266,,5 5 tto o 2299,,55 mmmm D

Drrooppppiinng g ppooiinntt IISSO O 22117766



1 18800 °°CC

O

Oiil l sseeppaarraattiioon n aafftteer r 224 4 h h aat t 110000°°CC AAnnnneex x GG



3 % (mass) 3 % (mass) Oxidation resistance pressure drop

Oxidation resistance pressure drop after 1

after 100 h at 00 h at 160°160°CC

Annex H



0 0,,11 MMPPaa

P

Poouurr--ppooiinnt t oof f bbaasse e ooiill IISSO O 33001166 bbeelloow w ––6600 °°CC 5.7.3

5.7.3 SuitaSuitability bility for usfor use in e in sliding sliding elementselements

When tested in accordance with annex D, the lubricant shall meet the friction requirements given in 4.1.1 and When tested in accordance with annex D, the lubricant shall meet the friction requirements given in 4.1.1 and 4.1.2.

4.1.2.

For the short term friction test the mating sliding surface shall be made of hard chromium in accordance with 5.4 For the short term friction test the mating sliding surface shall be made of hard chromium in accordance with 5.4 or austenitic steel in accordance with 5.3 and for the long term friction test of austenitic steel in accordance with or austenitic steel in accordance with 5.3 and for the long term friction test of austenitic steel in accordance with 5.3.

5.3. 5.

5.88 AAdhdhesesivive fe for or bobondndining ag aususteteninititic sc steteel el shsheeeetsts NOTE

NOTE The main function of the adhesive is to join austenitic steel sheets to the baThe main function of the adhesive is to join austenitic steel sheets to the backing plate in such acking plate in such a way that shear is transmitted without relative movement.

way that shear is transmitted without relative movement. The adhesive shall be solvent free.

The adhesive shall be solvent free. 5.8

5.8.1.1 ReqRequireuirementments in shors in short term tet term testst

The short term test shall be carried out in accordance with annex J on five specimens. The short term test shall be carried out in accordance with annex J on five specimens.

When tested without ageing, the lap shear strength of the fastening of each specimen shall not be less than 25 When tested without ageing, the lap shear strength of the fastening of each specimen shall not be less than 25 MPa. MPa. d d C C o o p p y y : : N N g g a a P P h h a a m m , , M M a a y y 0 0 3 3 , , 2 2 0 0 0 0 2 2 , , U U n n c c o o n n t t r r o o l l l l e e d d C C o o p p y y , , ( ( c c ) ) B B S S I I

(20)

5.8

5.8.2.2 ReqRequireuirementments in long tes in long term tesrm testt

The long term test shall be carried out in accordance with annex J on each of five specimens. The long term test shall be carried out in accordance with annex J on each of five specimens.

When tested after accelerated ageing in accordance with J 4.2.1 and J 4.2.2, the average lap shear strength of When tested after accelerated ageing in accordance with J 4.2.1 and J 4.2.2, the average lap shear strength of the fastening from both sets of five specimens shall not be less than 25 MPa.

the fastening from both sets of five specimens shall not be less than 25 MPa. 6

6 DDeessiiggn n rreeqquuiirreemmeennttss

This clause deals with all the design details, design data and dimensioning. This clause deals with all the design details, design data and dimensioning. 6.

6.11 CoCombmbininatatioion n of of slslididining g mamateteririalalss

The sliding materials shall be combined as shown in Table 9. Only one combination shall be used in a sliding The sliding materials shall be combined as shown in Table 9. Only one combination shall be used in a sliding surface.

surface.

The sliding surface shall be lubricated in accordance with 7.4. The sliding surface shall be lubricated in accordance with 7.4.

Table

Table 9 9 -- PermissPermissible ible combinaticombination on of of materiamaterials ls for for permanenpermanentt applications as sliding surfaces.

applications as sliding surfaces. P

Pllaanne e ssuurrffaaccee CCuurrvveed d ssuurrffaaccee GGuuiiddeess austenitic steel

austenitic steel undimpledundimpled_PTFE_PTFE Dimpled Dimpled PTFE PTFE Austenitic Austenitic steel steel Dimpled Dimpled PTFE

PTFE hhaarrd d cchhrroommiiuumm CCMM11

Austenitic Austenitic

steel steel a

alluummiinniiuumm CCMM22 6

6..22 PPTTFFE E SShheeeettss 6.2

6.2.1.1 RecRecesseessed Pd PTFE TFE shesheetsets

The PTFE sheets shall be recessed into a backing plate as shown in Figure 2. The PTFE sheets shall be recessed into a backing plate as shown in Figure 2.

Dimensions in millimetres Dimensions in millimetres

NOTE

NOTE A fixed value for the depth of the A fixed value for the depth of the relief is given to facilitate the measurement of the PTFErelief is given to facilitate the measurement of the PTFE protrusion “h” after installation. For section x –x, see Figure 3.

protrusion “h” after installation. For section x –x, see Figure 3. Key

Key 1

1 SShhaarrp p eeddggee

Figure 2 - Details of PTFE recess and relief Figure 2 - Details of PTFE recess and relief

bs en1337-2

A single copy of this British Standard is licensed to

A single copy of this British Standard is licensed to

Nga Pham

Nga Pham

on May 03, 2002

on May 03, 2002

This is an uncontrolled copy. Ensure use of the most

This is an uncontrolled copy. Ensure use of the most

current version of this document by searching British

current version of this document by searching British

Standards Online at bsonline.techindex.co.uk

Structural bearings Ð

Structural bearings Ð

Part 2: Sliding elements

Part 2: Sliding elements

National foreword

National foreword

NORME EUROPÉENNE

NORME EUROPÉENNE

EUROPÄISCHE NORM

EUROPÄISCHE NORM

December 2000

December 2000

English version

English version

Structural bearings - Part 2: Sliding elements

Structural bearings - Part 2: Sliding elements

Contents

Contents

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_{December 2000}

_{December 2000}