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Block shaft coupling advantages and disadvantages.

By Mike Santora | October 12, 2016

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Coupling Tips

oep-block-coupling-imageAdvantages:

  • Protects shaft-support bearings by exerting consistently low reactive forces, even under large misalignments
  • Homokinetic transmission – driving and driven shafts rotate at exactly the same speed at all times
  • Zero backlash and high torsional stiffness
  • Electrical insulation
  • Accommodates moderate radial misalignment in a short length
  • Accommodates relatively large axial misalignment
  • Easy installation in blind or difficult installations – all block couplings have through bores
  • Inexpensive replaceable wear element
  • Internal grease reservoir provides continuous flow of lubrication driven by centrifugal force, allowing coupling to survive harsh, dirty environments
  • Somewhat “failsafe”, in the sense that the driving hub will continue to turn the driven hub after failure of the midsection

Disadvantages:

  • Accommodates a relatively small angular misalignment
  • No mechanical “fuse” feature – unlike standard Oldham designs, under overload, all subcomponents of this coupling must be replaced, rather than one inexpensive wear element

Typical applications:

  • Submersible pumps, agricultural and garden equipment

OEP Couplings
www.oepcouplings.com

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