ISO 19291:2016

INTERNATIONAL ISO
STANDARD 19291
First edition
2016-12-01
Lubricants — Determination of
tribological quantities for oils and
greases — Tribological test in the
translatory oscillation apparatus
Lubrifiants — Détermination de quantités tribologiques d’huiles et de
graisses — Essais tribologiques dans l’appareil translation-oscillation
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 3
6 Apparatus . 4
7 Test pieces . 5
7.1 General . 5
7.2 Test ball . 6
7.3 Disk . 6
8 Preparation of apparatus . 6
8.1 Installing the specimen holders and test specimen in the test chamber . 6
8.2 Test conditions . 7
9 Test procedure . 7
9.1 General . 7
9.2 Friction and wear . 8
9.3 Extreme pressure test . 8
9.4 Calibration and inspection . 8
9.5 Determining the tribological quantities . 8
9.5.1 General. 8
9.5.2 Wear scar diameter of ball. 8
9.5.3 Wear volume of ball . . 8
9.5.4 Wear volume of disk . 8
9.5.5 Optional . 8
10 Expression of results . 9
10.1 General . 9
10.2 Friction and wear testing . 9
10.3 Extreme pressure testing . 9
11 Precision . 9
11.1 General . 9
11.2 Repeatability, r .9
11.3 Reproducibility, R .9
12 Test report .10
Annex A (informative) Translations of terms .11
Annex B (informative) Compilation of test results for filing.12
Bibliography .13
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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The committee responsible for this document is ISO/TC 28, Petroleum and related products from
synthetic or biological origin.
iv © ISO 2016 – All rights reserved

Introduction
Liquid lubricants (oils) and consistent lubricants (greases) reduce friction and wear and/or prevent
adhesive wear (scuffing, galling). In order to establish the tribological profile of a lubricant adequate
tribometric, test methods are required. The test method described in this document can be regarded
as an evaluation tool for the determination of the lubricant-related contribution to friction, wear, load
carrying capacity and extreme pressure behaviour.
This test method is dedicated to a translatory oscillation apparatus which is fully computer controlled.
This test method harmonizes the following national test methods using the ball-on-disk contact
geometry:
[1]
a) DIN 51834-2 (oil, coefficient of friction and wear);
[2]
b) ASTM D6425 (oil, coefficient of friction and wear);
[4]
ASTM D7421 (oil, pass load/O.K. load);
[6]
ASTM D5706 (grease, pass load/O.K. load);
[8]
ASTM D5707 (grease, coefficient of friction and wear);
[9]
c) SH/T 0721 (grease, coefficient of friction and wear);
[7]
SH/T 0784 (grease, pass load/O.K. load);
[3]
NB SH/T 0847 (oil, coefficient of friction and wear);
[5]
NB/SH/T 0882 (oil, pass load/O.K. load).
The harmonization is also related to the use of only one type of cleaning solvent.
Users of this test method should determine whether the results obtained from this method correlate
with field performance or other applications.
It is the responsibility of the operator to ensure that all local legislative and statutory requirements
are met.
INTERNATIONAL STANDARD ISO 19291:2016(E)
Lubricants — Determination of tribological quantities
for oils and greases — Tribological test in the translatory
oscillation apparatus
1 Scope
This document describes test methods based on a high-frequency, linear-oscillation test machine to
determine tribological quantities like friction, wear, load carrying capacity and extreme pressure
behaviour of liquid lubricants (oils) and consistent lubricants (greases) in the ball-on-disk contact
geometry.
[1] [3]
NOTE This method is technically equivalent to DIN 51834–2/ASTM D6425 (NB/SH/T 0847 ) and
[4] [5] [6] [7] [8]
ASTM D7421 (NB/SH/T 0882 ) for oils, as well as ASTM D5706 (SH/T 0784 ) and ASTM D5707
[9]
(SH/T 0721 ) for greases.
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.
ISO 683-17, Heat-treated steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing steels
IEC 584-1, Thermocouples — Part 1: Reference tables
IEC 584-2, Thermocouples — Part 2: Tolerances
IEC 751, Industrial platinum resistance thermometer and platinum temperature sensors
ASTM D7755, Standard Practice for Determining the Wear Volume on Standard Test Pieces Used by High-
Frequency, Linear-Oscillation (SRV) Test Machine
DIN 51631:1999-04, Mineral spirits — Special boiling point spirits — Requirements
DIN 51834-3, Testing of lubricants — Tribological test in the translatory oscillation apparatus — Part 3:
Determination of tribological behaviour of materials in cooperation with lubricants
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp/
...