Rockwell 4JR (+/- 1945 - 1960)

Rockwell 4JR (+/- 1945 - 1960)
  • Analog Rockwell Hardness Tester
  • Scales: HRA, HRB, HRC, etc
  • Rockwell: 60, 100 and 150 kgf
  • Today's Tester: Rockwell™ 574 & 2000
Rockwell 504R (+/- 1960 - 2000)

Rockwell 504R (+/- 1960 - 2000)
  • Analog Rockwell Hardness Tester
  • Regular Scales: HRA, HRB, HRC
  • Superficial Scales: HR15N, HR30T
  • Rockwell: 10, 30, 45, 60, 100 and 150 kgf
  • Today's Tester: Rockwell™ 574 & 2000
Rockwell 524T (+/- 1970 - 2005)

Rockwell 524T (+/- 1970 - 2005)
  • Digital read-out Rockwell Hardness Tester
  • Regular Scales: HRA, HRB, HRC, etc
  • Superficial Scales: HR15N, HR30T, etc
  • Rockwell: 10, 30, 45, 60, 100 and 150 kgf
  • Today's Tester: Rockwell™ 574 & 2000