Impact Hardness Testers 
Series 640 
 
FEATURES
| Range | Accuracy | Application Range | Impact Devices | Impact Capacity | Code No. | 
| (170-960) HLD (17-68.5) HRC (19-651) HB | HLD: ±5 HRC: ±1 HB: ±4 | Test the normal smooth, flat surface | D | 11 Nmm | 640-17-1 | 
| (170-960) HLD (17-68.5) HRC (19-651) HB | HLD: ±5 HRC: ±1 HB: ±4 | Test hole or hollow cylindrical | DC | 11 Nmm | 640-17-2 | 
| (170-960) HLD (17-68.5) HRC (19-651) HB | HLD: ±5 HRC: ±1 HB: ±4 | Test small, light, thin parts and surface of hardened layer | C | 2.7 Nmm | 640-17-3 | 
| (170-960) HLD (17-68.5) HRC (19-651) HB | HLD: ±5 HRC: ±1 HB: ±4 | Test groove or re-entrant surface | D+15 | 11 Nmm | 640-17-4 | 
| (170-960) HLD (17-68.5) HRC (19-651) HB | HLD: ±5 HRC: ±1 HB: ±4 | Test slender narrow groove or hole | DL | 11 Nmm | 640-17-5 | 
| (170-960) HLD (17-68.5) HRC (19-651) HB | HLD: ±5 HRC: ±1 HB: ±4 | Test large, thick, heavy and rough surface steel | G | 90 Nmm | 640-17-6 | 
 Malaysia
Malaysia