ASTM D1478-11(2017)e1
Standard Test Method for Low-Temperature Torque of Ball Bearing Grease

Standard No.

ASTM D1478-11(2017)e1

Release Date

2011

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D1478-18

Latest

ASTM D1478-20

Scope

5.1 This test method was developed using greases having very low torque characteristics at8201;−548201;°C (−658201;°F). Specifications for greases of this type commonly require testing at this temperature. Specifications for greases of other types can require testing at temperatures from8201;−758201;°C to8201;−208201;°C (−1008201;°F to 08201;°F).

5.2 This test method has proved helpful in the selection of greases for low-powered mechanisms, such as instrument bearings used in aerospace applications. The suitability of this test method for other applications requiring different greases, speeds, and temperatures should be determined on an individual basis.

5.3 Test Method D4693 may be better suited for applications using larger bearings or greater loads. However, greases having such characteristics that permit torque evaluations by either this test method or Test Method D4693 will not give the same values in the two test methods (even when converted to the same torque units) because the apparatus and test bearings are different.

1.1 This test method covers the determination of the extent to which a grease retards the rotation of a slow-speed ball bearing by measuring starting and running torques at low temperatures (below8201;−208201;°C (08201;°F)).

1.1.1 Torque measurements are limited by the capacity of the torque-measuring equipment.

Note 1: When initially developed, the original dynamometer scale limited the torque capacity to approximately 308201;0008201;g·cm; the original dynamometer scale is obsolete, however. The suggested replacement scale has not been evaluated; it could extend the limit to approximately 758201;0008201;g·cm.

1.2 The values stated in SI units are to be regarded as standard.

1.2.1 Exceptions—The values given in parentheses are for information only. The exception is torque values that are given in cgs-metric units, which are universally used in grease specifications.

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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard and warning statements, see 6.1.1, 7.2, 7.4, 8.7, and 8.11.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the......

ASTM D1478-11(2017)e1 Referenced Document

• ASTM D4693 Standard Test Method for Low-Temperature Torque of Grease-Lubricated Wheel Bearings

ASTM D1478-11(2017)e1 history

• 2020 ASTM D1478-20 Standard Test Method for Low-Temperature Torque of Ball Bearing Grease
• 2018 ASTM D1478-18 Standard Test Method for Low-Temperature Torque of Ball Bearing Grease
• 2011 ASTM D1478-11(2017)e1 Standard Test Method for Low-Temperature Torque of Ball Bearing Grease
• 2011 ASTM D1478-11 Standard Test Method for Low-Temperature Torque of Ball Bearing Grease
• 2007 ASTM D1478-07 Standard Test Method for Low-Temperature Torque of Ball Bearing Grease
• 2002 ASTM D1478-02 Standard Test Method for Low-Temperature Torque of Ball Bearing Grease
• 1991 ASTM D1478-91(1997) Standard Test Method for Low-Temperature Torque of Ball Bearing Grease