Forum Class 4 to Class 6 & 7 Gearbox Adaptor

Class 7 requires 35,000Nm to achieve this with a stand alone tool requires a very large tool which even with an ROV is not easy to manoeuver. To overcome this issue the convertor tool is used. The tool contains a class 7 output interface and a receptacle for a class 4 torque tool, in between the two is a multiplication gearbox. The tool provides the required torque but maintains all the control (torque and turns) of a class 4 torque tool.


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  • ISO 13628-8 class 7
  • Up to 35,000Nm / 25,814 ft lbs
  • Class 4 torque tool input
  • Built in compensator
  • Two different nose lengths supplied