Rockwell hardness tester

Range of application
The hardness testers of the ZHR product family cover the following methods:
• Classical Rockwell methods (ZHR4150)
  according to ISO 6508 and ASTM E 18
  Pre-load: 10 kg. Test load: 60, 100,150 kg
  Scales: A B C D E F G H K L M P R S T V
• Superficial Rockwell (ZHR4045)
  according to ISO 6508 and ASTM E 18
  Pre-load: 3 kg. Test load: 15, 30, 45 kg
  Scales: N T W X Y
• Universal Rockwell (ZHR8150)
  according to ISO 6508 and ASTM E 18
  Pre-load: 3, 10 kg.
  Test load: 15, 30, 45, 60, 100, 150 kg
  Scales: A B C D E F G H K L M N P R S T V W X Y
• Rockwell Plastics (LKP)
  according to ISO 2039-2 and ASTM D785 (A & B)