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