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Asked: March 25, 20242024-03-25T07:17:08+05:30 2024-03-25T07:17:08+05:30In: Coupling

What are the advantages of Bush Pin coupling?

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johncarter · Answer 1 · 2024-03-25T11:05:01+05:30

Bush pin coupling is a flexible coupling. Flexible couplings are used when there is an imperfect alignment between two connecting shafts of rotating equipment. it permits relative displacements between driven and driven shafts.
Bush pin coupling tolerates the misalignment.
- Angular Misalignment:
  The elastomeric bush can flex slightly to accommodate minor angular deviations between the shafts.
- Parallel Misalignment:
  The design allows for a small amount of side-to-side (lateral) offset between the shafts.
- Axial Misalignment:
  Within limits, the bush can absorb some end-to-end misalignment (shaft overhang)
Bush pin coupling can tolerate up to 0.5 mm axial misalignment and 1.5 $^o \,$ angular misalignment between connecting shafts.
Vibration Damping: The elastomeric bush material in the coupling helps dampen vibrations transmitted between the connected shafts. This can be beneficial for protecting machinery from wear and tear and improving overall system smoothness.
Lubrication-Free Operation: Bush pin couplings generally don’t require lubrication, reducing maintenance requirements.
Simple in construction, easy to assemble and disassemble.
In summary, the elastomeric material (rubber) in the coupling dampens sudden increases in torque (shock loads) and allows for some misalignment between the connected shafts.