Poldi Hardness Tester

Load is applied to the specimen and a standard test bar in a linear direction through a special Brin ell Ball of 10 mm dia. by a hammer blow. With the impact load being consistent, the extent of indentations obtai ned on the specimen and the test bar depend on their hardness, harder material gives less depth of indentation. The two diameters of indentations are measured by a special “Magnifiscope" measuring magnifier supplied with the tester. By referring to the table provided, the hardness of the specimen can be determined