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Plug-flex Coupling 
The
ESBI PLUG-FLEX is a highly flexible plug-in type coupling which creates a torsionally
soft connection between I.C. Engine & driven machines. The
inside diameter of the rubber disc element is vulcanized directly to a taper hub
or on a metal sleeve. The metal sleeve is bolted to a hub in pilot bored condition.
On its outer diameter, the rubber disc is engaged into an internally toothed aluminum
casing making a backlash free plug-in connection.  Plug-flex
shaft coupling design PFS is for shaft-to-shaft connection. Advantages
of highly flexible Plugflex couplings : - Torsionally
very soft.
- High damping capacity of torsional vibrations
and shock loads.
- Designed for blind mounting with an axial
float.
- Backlash free.
- Accepts
high misalignment.
- Protects the drive against overloads.
The above characteristics of the coupling find itself
to be very suitable for internal combustion engine drives apart from motor drives. Plugflex
coupling is suitable for a wide range of applications, which includes, gensets,
compressors (rotary, reciprocating), marine propulsions, pumps, blowers, etc. 
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