FLEXIBLE SHAFT COUPLING Reduce Vibration & Costly Transmission Repairs
R&D Flexible Couplings consist of a flexible disc machined from polyester elastomer. The disc gives clearance for bolt heads, and is able to flex freely to take up any temporary misalignment of the engine and shaft due to flexing of the boat structure or the engine moving on its mounts. Forward thrust is taken in compression on the disc between the two half couplings and reverse thrust is taken again in compression on the disc between the two fail safe straps. In the unlikely event of a severe impact, the steel straps make the coupling fail safe and ensure drive is maintained both forward and reverse. FEATURES • Reduce engine noise and transmission vibration • Reduce costly transmission repairs
• Fits most major transmission makes & models • Under compression load in both forward & reverse • Quick & easy installation • Periodically check alignment easily • Impervious to salt water, diesel and lubrication oils
SIMPLE MAINTENANCE Checking alignment on installation and during service checks is quick and easy without disassembly by using the red bolt as a reference and checking the gap while manually rotating the shaft. DURABLE The couplings are made from a polyester elastomer which is not affected by salt water, diesel and lubrication fluids.
EASY INSTALLATION The R&D Marine Flexible Shaft Coupling requires no machining and comes supplied with bolts to connect between the two existing shaft flanges. FITS MANY APPLICATIONS For engines 5 to 1,500 hp.
FAIL-SAFE DESIGN The polyester elastomer disc is backed up by two metal compression straps, one on either side of the flexible coupling. These metal straps hold the system in constant compression whether the drivetrain is in forward or reverse. This feature dramatically extends the life of the system. The aft steel strap bolted to the transmission acts as a backing plate to prevent reverse thrust from pulling the element apart.
Forward Steel Strap
Aft Steel Strap
Forward Steel Strap Bolted to the shaft coupling
Aft Steel Strap Bolted to the transmission output
TO ORDER VISIT WWW.PYIINC.COM OR CALL 425-355-3669
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