ASTM D6121-05a

Standard Test Method for Evaluation of the Load Carrying Capacity of Lubricants Under Conditions of Low Speed and High Torque Used for Final Hypoid Drive Axles

SCOPE
1.1 This test method is commonly referred to as the L-37 test. This test method covers a test procedure for evaluating the load-carrying, wear, and extreme pressure properties of a gear lubricant in a hypoid axle under conditions of low-speed, high-torque operation.
1.2 This test method also provides for the running of the low axle temperature (Canadian) L-37 test. The procedure for the low axle temperature (Canadian) L-37 test is identical to the standard L-37 test with the exceptions of the items specifically listed in . The procedure modifications listed in refer to the corresponding section of the standard L-37 test method.
1.3 &inch-pound-units;
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific warning information is given in Sections 4 and 7.

General Information

• Status: Historical
• Publication Date: 31-Oct-2005
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.B0.03 - Automotive Gear Lubricants & Fluids

Relations

• Replaces: ASTM D6121-05 - Standard Test Method for Evaluation of the Load Carrying Capacity of Lubricants Under Conditions of Low Speed and High Torque Used for Final Hypoid Drive Axles
• Effective Date: 01-Nov-2005
• Replaced By: ASTM D6121-06 - Standard Test Method for Evaluation of Load-Carrying Capacity of Lubricants Under Conditions of Low Speed and High Torque Used for Final Hypoid Drive Axles
• Effective Date: 01-May-2006
• Referred By: ASTM D8165-22 - Standard Test Method for Evaluation of Load-Carrying Capacity of Lubricants Used in Hypoid Final-Drive Axles Operated under Low-Speed and High-Torque Conditions
• Effective Date: 01-Nov-2005
• Referred By: ASTM D7450-19 - Standard Specification for Performance of Rear Axle Gear Lubricants Intended for API Category GL-5 Service
• Effective Date: 01-Nov-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation:D6121–05a
Standard Test Method for
Evaluation of Load-Carrying Capacity of Lubricants Under
Conditions of Low Speed and High Torque Used for Final
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Hypoid Drive Axles
This standard is issued under the fixed designation D 6121; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 235 Specification for Mineral Spirits (Petroleum Spirits)
(Hydrocarbon Dry Cleaning Solvent)
1.1 This test method is commonly referred to as the L-37
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2.2 Military Specification:
test. This test method covers a test procedure for evaluating
MIL-PRF-2105E Lubricating Oil, Gear, Multipurpose
the load-carrying, wear, and extreme pressure properties of a
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2.3 AGMA National Standard:
gear lubricant in a hypoid axle under conditions of low-speed,
Nomenclature of Gear Tooth Failure Modes
high-torque operation.
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2.4 SAE Standard:
1.2 Thistestmethodalsoprovidesfortherunningofthelow
SAE J308 Information Report on Axle and Manual Trans-
axle temperature (Canadian) L-37 test. The procedure for the
mission Lubricants
low axle temperature (Canadian) L-37 test is identical to the
SAE J2360 Lubricating Oil, Gear Multipurpose (Metric)
standard L-37 test with the exceptions of the items specifically
Military Use
listed in Annex A6. The procedure modifications listed in
Annex A6 refer to the corresponding section of the standard
3. Terminology
L-37 test method.
3.1 Definitions of Terms Specific to This Standard:
1.3 The values stated in inch-pound units are to be regarded
3.1.1 abrasive wear, n—on ring and pinion gears, removal
as standard. The values given in parentheses are mathematical
of material from the operating surface of the gear caused by
conversions to SI units that are provided for information only
lapping of mating surfaces by fine particles suspended in
and are not considered standard.
lubricant, fuel, or air or imbedded in a surface.
1.4 This standard does not purport to address all of the
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CRC Rating Manual No. 21
safety concerns, if any, associated with its use. It is the
3.1.2 adhesive wear, n—on ring and pinion gears, removal
responsibility of the user of this standard to establish appro-
of material from the operating surface of the gear caused by
priate safety and health practices and determine the applica-
shearing of junctions formed between operating surfaces in
bility of regulatory limitations prior to use. Specific warning
direct metal-to-metal contact; sheared-off particles either re-
information is given in Sections 4 and 7.
main affixed to the harder of the mating surfaces or act as wear
2. Referenced Documents particles between the surfaces. CRC Rating Manual No. 21
3 3.1.3 burnish, n—on ring and pinion gears, an alteration of
2.1 ASTM Standards:
the original manufactured surface to a dull or brightly polished
condition. CRC Rating Manual No. 21
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3.1.4 corrosion, n—in final drive axles, a general alteration
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
of the finished surfaces of bearings or gears by discoloration,
D02.B0 on Automotive Lubricants.
accompanied by roughening not attributable to mechanical
Current edition approved Nov. 1, 2005. Published November 2005. Originally
action. CRC Rating Manual No. 21
approved in 1997. Last previous edition approved in 2005 as D 6121–05.
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Until the next revision of this test method, the ASTM Test Monitoring Center
(TMC) will update changes in this test method by means of Information Letters.
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This edition includes all Information Letters through No. 05–1. Information Letters AvailablefromStandardizationDocumentsOrderDesk,Bldg4,SectionD,700
may be obtained from the ASTM Test Monitoring Center, 6555 Penn Ave, Robbins Avenue, Philadelphia, PA 19111–5098.
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Pittsburgh, PA15206,Attn:Administrator. The TMC is also the source of reference American Gear Manufacturers Assn. (AGMA), 1500 King St., Suite 201,
oils. Alexandria, VA 22314.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001.
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Standards volume information, refer to the standard’s Document Summary page on Available from Coordinating Research Council (CRC), 219 Perimeter Ctr.
the ASTM website. Pkwy., Atlanta, GA 30346.
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