Rocker Hardness Tester
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-6247-8_10084
n An instrument made up of two circular stainless runners connected through traverse bars spaced 25 mm apart. Rocking frequency is calibrated by weights on a glass standard. It works on the principle that a “soft” surface dampens the oscillations of a rocking wheel more than a “hard” one. Reference ASTM D 2134.
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© Springer Science+Business Media, LLC 2011