ASTM D217: Penetration, Worked 60 Stroke only

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ASTM D217 Cone Penetration of Lubricating Grease

The consistency or firmness of a grease can help determine its suitability for a given application. If the consistency is too low, the grease may leak out of areas it is supposed to lubricate. If it is too high, it may not flow into areas that need lubrication. Grease that has received minimal disturbance, such as being moved from sample container to test container, is considered “unworked”. When grease is stroked (subjected to shearing action) it is considered “worked”. Stroking usually changes the consistency of grease, and grease stroked for prolonged periods of time may show further consistency changes.

This test is intended to determine the consistency of a grease by measuring the depth to which a standard cone will sink when allowed to fall according to the method. The depth is measured in tenths of a millimeter and reported as a unitless number. Worked stabilities use a standard grease worker to apply a shear stress to the sample prior to measuring the penetration. This method requires 1.1 pound (0.5 kilogram) of sample. If you have a smaller quantity, please consider ASTM D1403 .  For a more severe prolonged worked stability (100,000 stroke) penetration test, consider FTM 313.

Many options are available for this test. When requesting it, please choose from the following:

(1) unworked penetration – usually used for storage stability studies

(2) 60 stroke worked penetration – the standard usually used to compare various greases and to assign NLGI numbers.

(3) Worked stability (10,000 stroke) penetration – usually used to predict what will happen to grease during use.

(4) Prolonged worked stability (100,000 stroke) penetration – usually used to predict what will happen to grease during extended use.

(5) Low temperature worked penetration – usually used with greases intended for low temperature applications. Please specify the desired temperature.

(6) Worked penetration after cooling – usually used to predict how a grease will be affected by temperature changes.

Related tests offered by Petro-Lubricant Testing Laboratories:

ASTM D1403 Cone Penetration of Lubricating Grease Using One-Quarter and One-Half Scale Cone Equipment

D937 Cone Penetration of Petrolatum FTM 313 Penetration of Lubrication Greases After Prolonged Working

Price: $75.00

Sample size: 1 pint/ 500g

Related tests:

Petro-Lubricant Testing Laboratories, Inc.
116 Sunset Inn Road, Lafayette, NJ 07848, USA
Phone: +1 973-579-3448

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