Hydrodynamic Brake


Our Hydrodynamic Brake consists of a stationary half (stator) and a rotary half (rotor). The stator is bolted into the housing while the rotor is coupled to the shaft, during normal operation the rotor spins freely. When the unit goes into backspin, the rotor begins to rotate in the counter clockwise direction, allowing the working fluid to be forced to the outside of the rotor, creating a circular flow path inside the brake cavity.  As the energized fluid from the rotor comes into contact with the stationary fins of the stator, the energy is transferred to the stator and back to the working fluid as heat. Small amounts of working fluid are continually removed from the system and replaced with new fluid. The working fluid contained in the drivehead reservoir is used as the braking medium, which allows the energy stored in the fluid column and rod string to safely dissipate without the drivehead reaching excessive backspin speeds.


  • Non friction brake eliminates wear on brake components
  • Brake capable of 1,420 ft – lbs (minimum) resisting torque at 500 rpm (M-60 & M-100)
  • Brake capable of 1,575 ft – lbs (minimum) resisting torque at 500 rpm (M-150 & M-300)
  • Reliable and repeatable braking
  • Backspin energy is absorbed by the working fluid
  • Heat generated by braking is dissipated by the fluid reservoir
  • Consistent braking with minimal maintenance throughout the life of the drivehead