The Initial Test Force: 98.07N; Tolerance: ± 2.0%
2. The Total Test Force: 588.4N, 980.7N, 1471N; Tolerance: 2.0%
3. The Indenter Specifications:
3.1 The φ3.175mm ball indenter
3.2 The φ6.35mm ball indenter
3.3 The φ12.7mm ball indenter
4. The Power Source: AC220V±5%, 50-60 HZ
5. Time-delayed control: 2-60 seconds, adjustable
6. The Max. Height of the Specimen Tested: 175 mm
7. The Distance from the Ball Indenter Center to the Instrument Body: 165mm.
8. The Overall Dimension (Length×Width ×Height): 520×215×700 (mm)
9. The Net Weight of the Tester: 78Kg (Approx)
10. The tolerances of displaying value and the repetition of the plastics Rockwell hardness tester
Scales | Hardness Range of Standard Hardness Blocks | Allowed Tolerance of Displaying Value | Max. Repetition of Displaying Value |
HRE | 70~94HRE | ±2.0HRE | 2.5HRE |
HRL | 100~120HRL | ±1.2HRL | 1.5HRL |
HRM | 85~110HRM | ±1.5HRM | 2.0HRM |
HRR | 114~125HRR | ±1.2HRR | 1.5HRR |
11. The Scales, Indenters, Test Force Values and Usage Ranges of the Plastics Rockwell Hardness Test
Scales | Ball Indenters | Initial Test Force (N) | Total Test Force (N) | Usage Ranges |
HRE | φ3.175mm (1/8 inch) | 98.07 | 980.7 | Hard plastics, hard rubbers, aluminum, tin, copper, mild steel, synthetic resin and friction materials |
HRL | φ6.35mm (1/4 inch) | 588.4 |
HRM | φ6.35mm (1/4 inch) | 980.7 |
HRR | φ12.7mm (1/2 inch) | 588.4 |
