Poldi Hardness Tester
Poldi Hardness
The hammer type Poldi Impact Hardness Tester is useful for simple and quick determination of Brinell hardness of metals such as steel, cast iron, brass, aluminum, copper etc. Due to easy handling and maneuverability, this tester is most suitable for testing heavy castings and other components.
Overview
Specifications
| Brinell Ball | 10 mm dia. Fixed in a special holder with a spring-loaded plunger |
|---|---|
| Standard Test Bar | Each bar individually calibrated with multiplying factor markings |
| Magnifiscope | Measuring magnifier with 7mm scale |
| Range | 7 mm |
| Scale graduations | 0.1 mm |
| Magnification | 10 x |
| Accuracy of Measurement | 0.05 mm |
| Hardness tables | Comparison Tables for finding hardness |
| Separate Tables | Steel, Cast Iron, Brass, Copper and Aluminum |
| Gross dimensions | 170 x 65x 40 mm (approx.) |
Features
Load is applied to the specimen and a standard test bar in a linear direction through a special Brinell Ball of 10 mm dia. by a hammer blow. With the impact load being consistent, the extent of indentations obtained 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.
Images