Hydrodynamic Brake Electric Driveheads

We provide a complete line of electric driveheads for all your production needs.

Image of an Electric Driveheads Oil Frame in a field

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, and during normal operation the rotor spins freely. When the unit goes into backspin, the rotor begins to rotate in the counterclockwise direction, allowing the working fluid to be forced to the outside of the rotor and 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, enabling the energy stored in the fluid column and rod string to safely dissipate without the drivehead reaching excessive backspin speeds.


  • Nonfriction brake eliminates wear on brake components
  • Brake capable of 1,420 ft-lb (minimum) resisting torque at 500 RPM (M-60 and M-100)
  • Brake capable of 1,575 ft-lb (minimum) resisting torque at 500 RPM (M-150 and 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