ASTM D7450-19
(Specification)Standard Specification for Performance of Rear Axle Gear Lubricants Intended for API Category GL-5 Service
Standard Specification for Performance of Rear Axle Gear Lubricants Intended for API Category GL-5 Service
SCOPE
1.1 This specification covers test methods and acceptance criteria for determining the acceptability of gear oils for applications that specify a lubricant meeting the performance requirements of API Category GL-5 service. Lubricants that meet these performance requirements are typically intended for use in automotive axles, particularly those containing hypoid gears, operating under various combinations of high-speed/shock-load and low-speed/high-torque conditions.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D7450 −19
Standard Specification for
Performance of Rear Axle Gear Lubricants Intended for API
1
Category GL-5 Service
This standard is issued under the fixed designation D7450; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Oxidative Stability of Lubricating Oils Used for Manual
Transmissions and Final Drive Axles
1.1 This specification covers test methods and acceptance
D6121 Test Method for Evaluation of Load-Carrying Capac-
criteria for determining the acceptability of gear oils for
ity of Lubricants Under Conditions of Low Speed and
applications that specify a lubricant meeting the performance
High Torque Used for Final Hypoid Drive Axles
requirements of API Category GL-5 service. Lubricants that
D7038 Test Method for Evaluation of Moisture Corrosion
meettheseperformancerequirementsaretypicallyintendedfor
Resistance of Automotive Gear Lubricants
use in automotive axles, particularly those containing hypoid
D7452 Test Method for Evaluation of the Load Carrying
gears, operating under various combinations of high-speed/
Properties of Lubricants Used for Final Drive Axles,
shock-load and low-speed/high-torque conditions.
Under Conditions of High Speed and Shock Loading
1.2 The values stated in inch-pound units are to be regarded
D8165 Test Method for Evaluation of Load-Carrying Capac-
as standard. The values given in parentheses are mathematical
ity of Lubricants Used in Hypoid Final-Drive Axles
conversions to SI units that are provided for information only
Operated under Low-Speed and High-Torque Conditions
and are not considered standard.
3
2.2 Military Standards:
1.3 This standard does not purport to address all of the
MIL-L-2105C Lubricating Oil, Gear, Multipurpose
safety concerns, if any, associated with its use. It is the
MIL-L-2105D Lubricating Oil, Gear, Multipurpose
responsibility of the user of this standard to establish appro-
MIL-PRF-2105E Lubricating Oil, Gear, Multipurpose
4
priate safety, health, and environmental practices and deter-
2.3 SAE Documents:
mine the applicability of regulatory limitations prior to use.
J306 Automotive Gear Lubricant Viscosity Classification
1.4 This international standard was developed in accor-
J2360 Lubricating Oil, Gear Multipurpose (Metric) Military
dance with internationally recognized principles on standard-
Use
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3. Terminology
mendations issued by the World Trade Organization Technical
3.1 Definitions:
Barriers to Trade (TBT) Committee.
3.1.1 ridging, n—on ring and pinion gears, an alteration of
the tooth surface to give a series of parallel raised and polished
2. Referenced Documents
ridges running diagonally in the direction of sliding motion,
2
2.1 ASTM Standards:
eitherpartiallyorcompletelyacrossthetoothsurfacesofgears.
D130 Test Method for Corrosiveness to Copper from Petro-
D6121
leum Products by Copper Strip Test
3.1.2 rippling, n—on ring and pinion gears, an alteration of
D892 Test Method for Foaming Characteristics of Lubricat-
the tooth surface to give an appearance of a more or less
ing Oils
regular pattern resembling ripples on water or fish scales.
D5704 Test Method for Evaluation of the Thermal and
D6121
3.1.3 pitting, n—on ring and pinion gears, small irregular
1
This specification is under the jurisdiction of ASTM Committee D02 on
cavities in the tooth surface, resulting from the breaking out of
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
small areas of surface metal. D6121
Subcommittee D02.B0 on Automotive Lubricants.
Current edition approved May 1, 2019. Published June 2019. Originally
approved in 2008. Last previous edition approved in 2013 as D7450 – 13. DOI:
3
10.1520/D7450-19. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.dodssp.daps.mil
4
Standards volume information, refer to the standard’s Document Summary page on Available from Society of Automotive Engineers (SAE), 400 Commonwealth
the ASTM website. Dr., Warrendale, PA 15096-0001, http://www.sae.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Ha
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7450 − 13 D7450 − 19
Standard Specification for
Performance of Rear Axle Gear Lubricants Intended for API
1
Category GL-5 Service
This standard is issued under the fixed designation D7450; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers test methods and acceptance criteria for determining the acceptability of gear oils for applications
that specify a lubricant meeting the performance requirements of API Category GL-5 service. Lubricants that meet these
performance requirements are typically intended for use in automotive axles, particularly those containing hypoid gears, operating
under various combinations of high-speed/shock-load and low-speed/high-torque conditions.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test
D892 Test Method for Foaming Characteristics of Lubricating Oils
D5704 Test Method for Evaluation of the Thermal and Oxidative Stability of Lubricating Oils Used for Manual Transmissions
and Final Drive Axles
D6121 Test Method for Evaluation of Load-Carrying Capacity of Lubricants Under Conditions of Low Speed and High Torque
Used for Final Hypoid Drive Axles
D7038 Test Method for Evaluation of Moisture Corrosion Resistance of Automotive Gear Lubricants
D7452 Test Method for Evaluation of the Load Carrying Properties of Lubricants Used for Final Drive Axles, Under Conditions
of High Speed and Shock Loading
D8165 Test Method for Evaluation of Load-Carrying Capacity of Lubricants Used in Hypoid Final-Drive Axles Operated under
Low-Speed and High-Torque Conditions
3
2.2 Military Standards:
MIL-L-2105C Lubricating Oil, Gear, Multipurpose
MIL-L-2105D Lubricating Oil, Gear, Multipurpose
MIL-PRF-2105E Lubricating Oil, Gear, Multipurpose
4
2.3 SAE Documents:
J306 Automotive Gear Lubricant Viscosity Classification
J2360 Lubricating Oil, Gear Multipurpose (Metric) Military Use
1
This specification is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.B0 on Automotive Lubricants.
Current edition approved May 1, 2013May 1, 2019. Published May 2013June 2019. Originally approved in 2008. Last previous edition approved in 20082013 as
D7450 – 08D7450 – 13. DOI: 10.1520/D7450-13.10.1520/D7450-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
http://www.dodssp.daps.mil
4
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7450 − 19
3. Terminology
3.1 Definitions:
3.1.1 ridging, n—on ring and pinion gears, an alteration of the tooth surface to give a series of parallel raised and polished
ridges running diagonally in the direction of sliding motion, either partially or completely across the tooth surf
...
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