The hardness is one of the important criteria of the mechanical functions of the materials, and the hardness test is the important means to judge the quality of the metallic materials or parts, As the metallic hardness ha mutual correspondent relations with other mechanical functions, the majority of the metallic materials can calculate the other mechanical functions such as the strength, the fatigue, the evolutionary change and the degree of being worn out can be approximately inferred from the hardness shown by the test.
- The manual Rockwell hardness fester is a popularly-used hardness testing instrument to measure the Rockwell hardness of the materials. The speed of loading the test force is regulated by the buffer whereas the change of the test force is made by rotating the carriage-changing hand-wheel. The operation of the present instrument is simple, its functions are stable, and its use is, therefore, widely spread.
Technical specifications
- The initial test force: 98.07N(10kg)
- The Total Test force: 588.4N(60kg), 980.7N(100kg), 1471N(150kg)
- The specifications of the indenter:
3.1 Diamond Rockwell indenter
3.2 Ball indenter ∮1.588mm
- Rockwell hardness testing range: (20~88) HRA
(20~100) HRB
(20~70) HRC
- The max height of the specimens: 170mm
- The distance from the center of the indenter to the instrument body: 165mm
- Overall dimension: 463×241×660mm
- The total weight: 78kg
- Scale, Indenter, Test Force and Application Field of the Rockwell Test
| Scale | Type of Indenter | Initial Test Force | Total Test Force （N） | Application Field |
|
HRA |
Diamond indenter | 98.07 N
（10kg） |
588.4（60kg） | Hard Alloys, Tempered steel with carbonized surface, Hardened Steel Plates |
| HRD | 980.7（100kg） | Thin steel plates, steel with tempered surface | ||
|
HRC |
1471（150kg） | Quenched steel, tempered steel, hard cast iron | ||
| HRF | Ball indenter φ1.5875m（1/16inches） | 588.4（60kg） | Cast iron, aluminum-magnesium alloy, bearing alloy, annealed copper alloy, thin and soft steel plate | |
|
HRB |
980.7（100kg） | Soft steel, aluminum alloy, copper alloy, forgeable cast iron, annealed steel | ||
| HRG | 1471（150kg） | Phosphorus bronze, beryllium bronze, forgeable cast iron | ||
| HRH | Ball indenter φ3.175mm （1/8 inches） | 588.4（60kg） | Aluminum, Zinc, Lead | |
| HRE | 980.7（100kg） | Bearing alloy, tin, hard plastic materials | ||
| HRK | 1471（150kg） |
Accessories (the Packing List)
Besides the main instrument, there are provided the following accessories:
| NO. | Name (specifications) | Quantity |
| 1 | Rockwell Diamond Indenter | 1 |
| 2 | Ball Indenter φ1.5875mm | 1 |
| 3 | Big Testing Table | 1 |
| 4 | Middle-sized Testing Table | 1 |
| 5 | “V”-shaped Testing Table | 1 |
| 6 | Rockwell standard Blocks | |
| 7 | High & Low HRC | 2 blocks in all |
| 8 | HRB Blocks | 1 |
| 9 | Sets of weights A、B、C | 3 sets in all |
| 10 | Protective Plastic Corer | 1 |
| 11 | Instruction Manual | 1 copy |
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