oSIST prEN 14865-1:2007
Railway Applications - Axlebox lubricating greases - Part 1: Method to test the ability to lubricate ordinary-speed vehicles with speeds up to 200 km/h and high-speed vehicles with speeds up to 300 km/h
Railway Applications - Axlebox lubricating greases - Part 1: Method to test the ability to lubricate ordinary-speed vehicles with speeds up to 200 km/h and high-speed vehicles with speeds up to 300 km/h
Bahnanwendungen - Schmierfette für Radsatzlager - Teil 1: Prüfung der Schmierfähigkeit von Radsatzlagern von Schienenfahrzeugen für normale Geschwindigkeiten bis 200 km/h und für Hochgeschwindigkeitsfahrzeuge bis 300 km/h
Applications ferroviaires - Graisses lubrifiantes pour boîtes d'essieux - Partie 1 : Méthode d'essai d'aptitude a lubrifier les véhicules circulant a des vitesses classiques jusqu'a 200 km/h et les véhicules circulant a grande vitesse jusqu'a 300 km/h
Železniške naprave - Maziva za ležaje kolesnih dvojic - 1. del: Preskusna metoda za ugotavljanje zmožnosti mazanja pri klasičnih vozilih za hitrosti do 200 km/h in pri vozilih za velike hitrosti do 300 km/h
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 14865-1:2007
01-april-2007
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]DXJRWDYOMDQMH]PRåQRVWLPD]DQMDSULNODVLþQLKYR]LOLK]DKLWURVWLGRNPKLQ
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Railway Applications - Axlebox lubricating greases - Part 1: Method to test the ability to
lubricate ordinary-speed vehicles with speeds up to 200 km/h and high-speed vehicles
with speeds up to 300 km/h
Bahnanwendungen - Schmierfette für Radsatzlager - Teil 1: Prüfung der
Schmierfähigkeit von Radsatzlagern von Schienenfahrzeugen für normale
Geschwindigkeiten bis 200 km/h und für Hochgeschwindigkeitsfahrzeuge bis 300 km/h
Applications ferroviaires - Graisses lubrifiantes pour boîtes d'essieux - Partie 1 : Méthode
d'essai d'aptitude a lubrifier les véhicules circulant a des vitesses classiques jusqu'a 200
km/h et les véhicules circulant a grande vitesse jusqu'a 300 km/h
Ta slovenski standard je istoveten z: prEN 14865-1
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
75.100 Maziva Lubricants, industrial oils and
related products
oSIST prEN 14865-1:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
DRAFT
prEN 14865-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2006
ICS 45.040; 75.100
English Version
Railway Applications - Axlebox lubricating greases - Part 1:
Method to test the ability to lubricate ordinary-speed vehicles
with speeds up to 200 km/h and high-speed vehicles with
speeds up to 300 km/h
Applications ferroviaires - Graisses lubrifiantes pour boîtes
d'essieux - Partie 1 : Méthode d'essai d'aptitude à lubrifier
les véhicules circulant à des vitesses classiques jusqu'à
200 km/h et les véhicules circulant à grande vitesse jusqu'à
300 km/h
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 256.
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 Management Centre 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, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14865-1:2006: E
worldwide for CEN national Members.
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prEN 14865-1:2006 (E)
Contents Page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 Symbols .7
5 Testing principle .8
6 Reagents and material .8
7 Test equipment .8
7.1 Test rig FE8 .8
7.2 Test bearings.9
7.3 Measuring equipment.10
7.3.1 General.10
7.3.2 Rolling element wear.11
7.3.3 Electric measuring of frictional forces .11
7.3.4 Temperature measurement.11
8 Sampling.11
9 Testing procedure.11
9.1 Washing procedure .11
9.2 Assembly .11
9.3 Running the test.11
10 Evaluation.12
10.1 Recording .12
10.2 Test result.12
10.2.1 Rolling element wear.12
10.2.2 Testing temperature and frictional moment .13
11 Precision.13
11.1 General.13
11.2 Repeatability.13
11.3 Reproducibility.14
12 Test report .14
Annex A (informative) Maintenance.15
Annex B (informative) Round Robin test .16
B.1 Result .16
B.2 Symbols in the Figures B.1 and B.2.16
B.3 Test data distribution .17
Annex C (informative) Precision calculation examples.18
C.1 Repeatability example .18
C.2 Reproducibility example .18
Bibliography .19
2
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prEN 14865-1:2006 (E)
Foreword
This document (prEN 14865-1:2006) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
Part 1: Method to test the ability to lubricate ordinary-speed vehicles with speeds up to 200 km/h and
high-speed vehicles with speeds up to 300 km/h;
Part 2: Method to test the mechanical stability to cover vehicle speeds up to 200 km/h.
3
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prEN 14865-1:2006 (E)
Introduction
This European Standard standardizes a test method and acceptance criteria for the demand in EN 12081 for
testing the ability to lubricate axlebox lubricating greases. It addresses the issue of lubricating ability of
lubricating greases operating under severe conditions.
All lubricants have three main functions – to form a lubricating film that separates rolling elements and
raceways, to protect the bearing from corrosion and give good longevity. For lubricating greases in axleboxes
there is also the demand that the product must keep the lubricating ability, sometimes without relubrication,
during very long periods of time under arduous operating and environmental conditions.
The testing procedure in this European Standard is severe and is used to discriminate between lubricating
greases of different lubricating ability.
4
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prEN 14865-1:2006 (E)
1 Scope
This European Standard specifies a testing method and sets the acceptance criteria for the determining of the
lubrication ability of lubricating greases intended for the lubrication of axle box bearings. The testing method is
referred to in EN 12081. The lubricating ability, primarily related to the capability of lubricating greases to
protect against wear, is determined in a roller bearing lubricant test rig. Wear of the rolling bearing rollers, the
frictional behaviour and temperature during the test are used to discriminate between lubricating greases.
The method is carried out in order to test axlebox greases for ordinary-speed vehicles, with speeds up to
200 km/h, and for greases intended for high-speed vehicles, with speeds up to 300 km/h. The method is a
discriminating process, and accepted lubricating greases will be subject to more extensive performance tests
according to EN 12082.
For purpose of quality assurance and quality control, this test method is also used for batch testing of
lubricating greases.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For
dated references, only the edition cited applies. For undated references, the latest edition of the document
(including any amendments) applies.
ISO 3170, Petroleum liquids — Manual sampling
EN ISO 4259:1995, Petroleum products — Determination and application of precision data in relation to
methods of test
ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic
method for the determination of repeatability and reproducibility of a standard measurement method
ISO 5725-6:1994, Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in
practice of accuracy values
3 Terms and definitions
For the purposes of this European Standard, the following definitions apply.
3.1
lubricating grease
semi-solid product consisting of a mixture of liquid lubricant and thickened with soaps or other thickeners, and
may also contain other ingredients, imparting special properties (additives)
3.2
grease lubricating ability
lubricating ability of the grease during the stressing duration of the test, see 3.3, determined as the mean
rolling elements wear rate from tests with four tapered roller bearings.
NOTE In the FE8 test, the lubricating ability of grease is determined by wear and not by the service life of the grease.
3.3
stressing duration
period of time, t, during which the lubricating grease sample is stressed dynamically and thermally until the
test is terminated by the first failure of the test bearings or by the end of the testing period, see 3.4
5
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prEN 14865-1:2006 (E)
3.4
testing period
time required for testing, t , until failure occurs of one of the test bearings or 500 hours if a test run without
p
interruption
NOTE For approval, the required time for a test is always 500 hours (plus an initial operation during 24 hours at
750 r/min in the 1 500 r/min test). If a bearing will fail earlier, the test is failed.
3.5
frictional moment
torque acting as a mechanical resistance to rotation, resulting from bearing friction
3.6
frictional moment of the test bearing arrangement
torque, M, required for driving the two test bearings, see Figure 1, obtained by measuring the force for
r
retaining the bearing housing when the shaft is rotating
3.7
frictional moment of the test bearing arrangement at start
torque, M , of the test bearing arrangement immediately after starting the test
rs
3.8
run-in period
period of time, E , from the start of the test until the steady-state is reached
p
NOTE 1 During the run-in period, the grease is distributed and the run-in wear occurs. Due to the smoothing of the
contacting areas, the ratio of the lubricant film thickness to the sum of the roughness of the contact areas increases,
thereby increasing the separating effect of the lubricant film. Depending on the smoothing of the contacting surfaces, the
frictional moment is continuously reduced during the run-in process.
NOTE 2 For the test run at 1 500 r/min, there is a special run-in period of 24 hours before the real test starts. This run-
in is carried out with the lower speed 750 r/min and with the axial load Fa = 10 kN.
3.9
Frictional moment of the test bearing arrangement at steady-state
torque, M is obtained after the run-in period and is reached when the frictional moment stabilizes at a fairly
rb
constant value (variation can be 20 %)
3.10
steady-state temperature
temperature, θ , obtained at the end of the run-in period
B
3.11
test temperature
temperature, θ , measured at the outer ring of the spring-side test bearing
NOTE Owing to better heat dissipation, the bearing at the drive side may be 2 to 5 °C cooler.
3.12
rolling element wear
wear loss in weight, m , during the stressing period due to wear caused by rolling and sliding movements in
w
the rolling element raceway contacts and rolling element wear from cage contacts
NOTE The loss in weight is determined by weighing the rolling elements on a precision balance before and after the
stressing period. A change of the magnetic properties, which may occur during the stressing time of steel parts, can affect
the weighing result when an electronic balance is used. To avoid possible weighing errors, the rolling bearing part to be
weighed has to be placed at a proper distanced from the electronics, e.g. by suitable equipment.
6
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prEN 14865-1:2006 (E)
3.13
mean rolling element wear
mean rolling element wear in weight, m , from two tests according to this European Standard, each with two
wm
bearings, carried out in the same test rig and with lubricating grease from the same sample
3.14
combined mean rolling element wear from repeatability tests
mean rolling element wear in weight, m , from four or more tests, each with two bearings, carried out in the
r
same test rig and with lubricating grease from the same sample
3.15
combined mean rolling element wear from reproducibility tests
mean rolling element wear in weight, m , from tests, each with two bearings, carried out with two or more tests
R
in different laboratories and with lubricating grease from the same sample
3.16
test speed
operating speed, n, of the test bearing arrangement
3.17
test load
load, F , constant in size and acting on the test bearings in axial direction
a
3.18
outlier
a deviating test value that is not fulfilling the statistical criteria specified in ISO 5725-2
4 Symbols
For the purposes of this European Standard, the following symbols apply:
E run-in period, in hours
p
F test load, in newtons
a
M frictional moment of the test bearing arrangement, in newton metres
r
M frictional moment of the test bearing arrangement at steady-state, in newton metres
rb
M frictional moment of the test bearing arrangement at start, in newt
...
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