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ASTM G182-2013 Standard Test Method for Determination of the Breakaway Friction Characteristics of Rolling Element Bearings

Standard Number:  ASTM G182-2013
Title:  Standard Test Method for Determination of the Breakaway Friction Characteristics of Rolling Element Bearings
Language:  English
Replacing Standard:  ASTM G182-06

Execute Date:  2013/11/15
Status:  Current
International Classification for Standards (ICS)MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE>>Bearings>>Rolling bearings
Publisher:  American Society for Testing Material (ASTM)
Price:  
Number of Pages:  

Description:

Scope

1.1 This test method is an extension of Test Method G164 and uses an inclined plane and a paperclip rider to detect the presence or absence of lubricants on the surfaces of flexible webs. A study to identify free spinning or low rolling friction bearings indicated that the paperclip friction test could be used for rolling friction by simply replacing the paperclip with a rolling element bearing on an axle. The angle of the inclined plane at initiation of rolling is the breakaway angle. This test method can be used to measure the angle at breakaway of small diameter (up to 100 mm outside diameter) rolling element bearings. The bearings that have been tested in the development of this method are conventional ball bearings with different separators, seals, and different conditions of lubrication (none, oil, greases, and so forth), but there is no technical reason why this test method would not work with bearings of other design, including plain bearings. Rolling element bearings like any sliding system can have friction characteristics at breakaway that are different than rolling continuously. As is the case with most inclined plane friction tests, the test only produces the friction characteristic at the onset of measurable rolling, using the angle (θ) when measurable rolling commences. The objective of this test is an assessment of breakaway rolling friction characteristics to assist machine designers in the selection of rolling element bearings for instrument pivots and the like where breakaway friction is a concern.

  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  183KB
Tile in English:  Standard Test Method for Determination of the Breakaway Friction Characteristics of Rolling Element Bearings

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