are trusted equipment to test and determine the resistance to degradation by impact and abrasion of hard lumpy ores like various Iron oxides, Sinter and Pellets, etc.
The test sample is placed in a standard Tumbler Drum and rotated for a specified number of revolutions. The sample is removed and screened by means of standard sieves. The individual size fractions are weighed. From the masses of the different size fractions obtained after sieving the Tumbler and Abrasion indices are calculated.
The equipment complies with IS:6495