| Introduction | | | | measuring the rebound hardness of a wide variety of |
| Explore, as you will, the relationship between rebound | | | | metallic parts, only that the size of the sample |
| hardness and Scleroscope, you shall be introduced to | | | | material should be large enough to cause maximum |
| a rather unique hardness measure test - the Rebound | | | | possible bounce. Well-finished, smooth metal rolls give |
| Hardness Test or the Dynamic Hardness Test. The | | | | the best rebound hardness measures as part of the |
| Rebound Hardness Test measures hardness of | | | | Scleroscope test. |
| materials in terms of the 'height of rebound of the | | | | The Scleroscope test is a non-marking test and since |
| indenter' dropped on the materials surface with the | | | | it does not leave any indent on the sample material, |
| help of a special device known as the 'Scleroscope'. | | | | it can be used immediately after the test without |
| Put in other words, the Scleroscope measures | | | | any refinishing. |
| hardness in terms of the elasticity of the material, | | | | Updates On The Scleroscope |
| where the hardness number is dependent on the | | | | The Scleroscope test has been used to the greatest |
| height to which the hammer rebounds. The harder | | | | advantage in the development of electronic |
| the material, the higher is the rebound. | | | | instruments for measuring rebound hardness of |
| The Scleroscope test to determine rebound hardness | | | | materials. These electronic devices make use of a |
| involves dropping a diamond tipped hammer (falling | | | | spring to get a spherical, tungsten carbide tipped |
| under the force of its own weight from a fixed | | | | object moving towards the sample material surface. |
| height) on the sample material. The height of the | | | | The other difference is that unlike Scleroscopes, |
| rebound travel of the hammer is measured on a | | | | these instruments measure the loss of energy of the |
| graduated scale, depending on the model being used. | | | | impact body. Thus, they measure the two velocities - |
| The C Scleroscope testers make use of a glass tube | | | | the velocity of the body before and after the |
| graduated from 0 to 140 to measure the height of | | | | impact. The difference between the two velocities |
| rebound and the D model had a 0 to 120 dial-gauge | | | | (or the loss of speed) gives the hardness number of |
| to determine the rebound height. | | | | the material and it can be arrived at by using any of |
| Application and Advantages of Scleroscope Test | | | | the common hardness scales like the Brinell or |
| Being portable, the Scleroscopes are used for | | | | Rockwell scales. |