Marland has been producing overrunning clutches since 1931. The Marland principle of rollers on inclined cam planes has proven its dependability for nearly 75 years in worldwide installations ranging from food processing to equipment used in steel mills and heavy mining industries.

HB Clutches

HB Clutches are the only one-way clutch for your hydro-dynamic drilling rigs. Consist of an automatic freewheel clutch mounted on a hydrodynamic brake. Allows brake to work only when lowering loads from drawworks cable reel.

  • Uniform Load Distribution
  • No Loose Parts
  • No Backlash
  • Long Service Life
  • Superior Roller Design

HB Clutch
Uniform Load Distribution is assured by full-phase true cylindrical rollers enclosed in a cage to act in unison on flat cam surfaces. The cage forces all the rollers to engage simultaneously, accurately maintaining their relative positions, thereby assuring that each roller will carry an equal share of the load.

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