Flexible Coupling For Boat Propeller Shaft-(shaft Saver) on 2040-parts.com
Fernandina Beach, Florida, United States
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Manufactured by R&D
Marine, the flexible coupling fits between the boat propeller shaft coupling
and the Yanmar KM or KBW gearbox output coupling. This flexible coupling
consists of a contoured flexible disc molded in tough yet resilient new type
Polyester Elastomer. The contoured coupling disc gives clearance for bolt
heads, and allows the coupling to flex freely to take up any temporary
misalignment of the engine and propeller shaft, due to flexing of the boat
structure or the engine moving on its rubber engine mountings. Forward thrust
is taken in compression on the coupling disc between the two shaft half
couplings and reverse thrust is taken again in compression on the coupling disc
between the two fail safe straps. A safety feature of the R&D 910 series
flexible couplings is that in the unlikely event of a coupling disc failure,
the steel straps make the coupling fail safe and ensure propeller shaft drive
is maintained in both forward and reverse
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