Presentation Profile

Design & Development of a New Innovative Test Method to Quantify Tackiness on a Wider Range of Greases

Main Author
Dr. Raj Shah - Koehler Instrument Company, Inc.

Additional Authors
  • Stanley Zhang - Koehler Instrument Company, Inc.
  • Stefan Lim - Koehler Instrument Company, Inc.
Abstract Number: 126
Abstract:

Greases are utilized in a wide range of applications to increase equipment efficiency or protect the components from friction and wear. Ensuring that adequate quantities of grease remain adhered to motile parts is critical to maintain performance and integrity. Determining grease tackiness which is, a measure of the adhesive properties of a grease sample, can provide crucial information about the compatibility of a certain grease with a specific task. Adhesive properties are the result of the high-weight polymers that greases are comprised of. Currently, the most common method of testing a grease’s tackiness is to use the finger test. The finger test is a qualitative test in which the tester places an unspecified amount of sample between their thumb and index finger and pulls them apart to determine if a grease is of low, moderate, or high tackiness. In this poster, we discuss the development of a new instrument and procedure analogous to the finger test, but with quantitative results. The principle of pulling apart grease with one’s fingers is standardized with two metal plates that can accurately measure the force exerted to separate the sample. We have run tests on numerous grease samples with our new instrument in an attempt to generate a new test procedure along with repeatability and reproducibility for this refined and unique technique.

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